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Fixed Resistors Product Data Short Form Belief in Technology 1 Fixed Resistors TT electronics plc is a global electronics company. Within its electronic components group are multiple manufacturing facilities for fixed resistors and dedicated engineering teams providing custom solutions. Welwyn Components, IRC and BI Technologies are three market leading companies within this group, each with a 70-year track record of resistive component innovation. TT electronics offers the full spectrum of resistor technologies and a broad standard product range, in addition to providing custom engineered solutions. Medical Application A manufacturer of portable automatic external defibrillators (AEDs) needed a compact high voltage resistor for use in the charge regulation circuit. Standard products from other sources were proving unreliable under conditions of sustained high humidity and high voltage loading. The precision and stability with time and temperature were critical as they directly impact the tight error budget for delivered energy dosage. TT electronics engineers solved this problem with a planar resistor with optimised thick-film element design and a high integrity epoxy coating and supported the customer through their rigorous approval process. Other innovations in this area include pulse withstanding chip resistors for monitor circuit protection and a 200J energy dump resistor based on reinforced wirewound technology to enable daily self-test diagnostic cycles. Aerospace Application A designer working on an anti-ice aircraft surface heating system had to meet stringent safety requirements in the event of failure of a heating circuit. The failure mode to be mitigated was an “always on” condition, and this called for a single shot disconnection switch. TT electronics engineers were contacted to help identify a solution, but nothing was available off the shelf. A set of potential solutions was proposed and the preferred option was a combination of selfswitching resistive heater and thermal fuse. This was developed from concept into a fully qualified component within the required timescale. The compact format of the design also contributed significantly to the customer’s mass reduction target. Consumer Application Safety is becoming increasingly important in consumer products and a key aspect is protection against fire by the use of fusing line input resistors. With one component it is possible to reduce inrush current, protect against power line surges and give flameproof circuit opening under fault conditions. One company working in this area had a further need for fusing to be inaudible and invisible to the consumer. TT electronics devised a solution using a wirewound resistor with impact absorbing coating which contains the fused element without fragmenting. Other innovations include the offer of UL1412 recognised fusing resistors. Fixed Resistors Industrial Application High-end industrial circuit breakers need to give reliable long-term performance under harsh conditions. In particular, transient surges caused by switching of inductive loads present a challenge. When a designer of industrial circuit breakers needed to modernise a design to SMT format, a through-hole wirewound protection resistor was proving hard to replace without filling a very large area with chip resistors. TT electronics developed a solution whereby an axial part is leadformed and packed in blister tape. The resulting “Z-form” component can be picked, placed and reflowed as an SMT part. Using the Short Form 1. 2. 3. Choose the right technology - page 3 Find the best resistor technology for the set of features your design needs Choose the right product series - pages 3 & 4 Use the SMT and Through Hole selector guides to identify a series which has the required ratings, precision and value range Choose the right product type - pages 5 to 16 Refer to product tables to select the correct size and link to further data Or, if you know the product series, use the Quick Find index. Quick Find Series Page Series Page Series Page 1600/1900 2500 3810 4500 4530 4800 BCS BHPR BPC BPR CAR CC CHP CR CRT DSC EMC F FCR FM GC GCF 9 5 6 6 6 12 5 9 9 10 12 8 8 15 16 9 14 6 14 14 7 16 HTCR HVC HVP LHVC LOB LRCS LRF LRF3W LRZ MAR MFP MFR MFR4P MF-S MH MHP OAR OARS OLV PCF PCFH PCFP 10 7 7 7 5 5 5 5 16 12 10 15 16 10 7 10 5 5 5 13 13 13 PFC PFC-HF PFC-HT PFC-A PFC-D PHVD PHVP PLO PR PTCR PWC PWRL RC RCP RTD SC3 SMHP SMP SOT143 SOT23 SQM SQP 15 15 15 13 13 7 8 6 13 15 9 6 13 13 15 10 10 11 13 13 11 11 HR 7 PCR 13 T 8 Series TD4 ULR ULW VRW W20 W30 WA80Z WA84F WBC WCCHB/WCDH WCR WDBR WH WHPC WHVL WL4 WMO-S WNCR WP-S WPYP WRM WSM Page 15 6 14 8 11 9 11 14 14 11 16 11 12 12 8 16 12 16 9 8 14 12 2 3 Fixed Resistors Technology and Product Selector Guides Technology Thick Film Thick Film on Steel Metal Film Metal Oxide Carbon Film Carbon Composition Wirewound Metal Alloy Metal Foil Low values Good Poor Fair Poor Poor Poor Excellent Excellent Poor High values Excellent Poor Good Fair Fair Poor Poor Poor Poor Tolerance Good Poor Excellent Poor Poor Poor Fair Fair Excellent TCR Fair Poor Excellent Fair Poor Poor Good Fair Excellent Power rating Good Excellent Fair Good Fair Fair Excellent Fair Poor Voltage rating Excellent Fair Fair Good Fair Poor Poor Poor Fair Stability Fair Fair Good Fair Fair Poor Fair Fair Excellent Overload Good Excellent Fair Good Fair Fair Good Fair Poor Surge Good Good Poor Good Fair Excellent Good Good Fair High Temp. Good Excellent Fair Good Fair Poor Good Good Fair Cs: Current Sense Hv: High Value / Voltage Fu: Fusible Pr: Precision Gp: General Purpose Sg: Surge / Pulse Hp: High Power Ts: Temperature Sensor Hr: High Reliability Zo: Zero-ohm Jumper Series 100G 10G Category Thick Film Power MELF Professional chip Trimmable chip Double-sided chip Fusible chip High value chip High temperature High voltage chip Lower range HVC Current sense sm. Current sense Current sense 3W High current link Semi-precision PTC sensor chip Pulse chip Power chip 3W TO-263 power SOIC power General chip Power chip Chip array Thin Film Precision chip High temp. PCF Passivated PCF Platinum sensor MELF TaN Thin Film Precision chip Attenuator chip Divider chip High freq. PFC High temp. PFC Divider / array Divider Wirebond chip Metal Alloy High power chip Open air J-lead Flat chip Wirewound Z-form w/w Moulded w/w 1G 100M 10M 1M 100K 10K 1K 100R 10R 1R R1 R01 R001 Value (Ω) ≥5 1-2 0.25- 0.5 ≤0.1 Tol. (%) ≥100 50 25 10 - 15 ≤5 TCR (ppm/°C) 100K 10K 1000 100 10 LEV (V) 100 10 1 0.1 Power (W) 0.01 Surface Mount Products Sg Hr Gp Sg Fu Hv Hp Hv Hv Cs Cs Cs Zo Pr Ts Sg Hp Hp Hp Gp Hp Gp CHP CR CRT DSC FCR HR HTCR HVC LHVC LRCS LR(F) LRF3W LRZ PCR PTCR PWC SC3 SMHP SMP WCR WHPC WNCR Pr Pr Hr Ts Pr PCF PCFH PCFP RTD WRM Hr Pr Pr Pr Pr Pr Pr Pr PFC PFC-A PFC-D PFCHF PFCHT SOT143 SOT23 WBC Cs Cs Cs BCS OARS ULR Hp Hp WA80Z WSM Fixed Resistors Cs: Current Sense Hv: High Value / Voltage Fu: Fusible Pr: Precision Gp: General Purpose Sg: Surge / Pulse Hp: High Power Ts: Temperature Sensor Hr: High Reliability Zo: Zero-ohm Jumper Series 100G 10G 100T→ Category Thick Film Ultra-high ohmic HV SIL resistor HV SIL divider TO227 power Power SIL Robust power SIL HV axial Compact HV axial Compact HV SIL TO-126, 220, 247 Precision SIL div. Precision SIL res. Ultra-HV axial ¼ – 1W HV axial Steel power res. Precision HV axial Metal Film Low value High precision UL1412 inrush Fusible film Ultra precision Small flameproof Professional film 0.6W 0207 film Flameproof film High voltage film Semi-precision Precision Power precision Nickel film sensor Metal Oxide Ceramic box vert. Ceramic box hor. Flameproof coat Carbon Film Lacquer coat Carbon Comp Moulded axial Wirewound Vitreous tubular Low val. hor. box Low val. vert. box Ceramic box vert. Ceramic box hor. UL1412 inrush Vitreous axial Flameproof pulse Flameproof fusing Low profile AI case Al clad power Flameproof coat Capacitor mount Metal Alloy Low value axial Low value open Wire shunt 0207 & wire links Metal Foil Ultra precision 1G 100M 10M 1M 100K 10K 1K 100R 10R 1R R1 R01 R001 Value (Ω) ≥5 1-2 0.25- 0.5 ≤0.1 Tol. (%) ≥100 50 25 10 - 15 ≤5 TCR (ppm/°C) 100K 10K 1000 100 10 LEV (V) 100 10 1 0.1 Power (W) 0.01 Through-hole & Off-PCB Products Hv Hv Hv Hp Hp Hp Hv Hv Hv Hp Hv Hv Hv Hv Hp Hv 3810 4500 4530 BHPR BPC BPR F GC HVP MHP PHVD PHVP T VRW WDBR WHVL Cs Pr Fu Fu Pr Hp Hr Gp Hp Hv Pr Pr Pr Ts 2500 CAR EMC FM MAR MFP MFR MFR4P MF-S MH PR RC RCP TD4 Hp Hp Hp SQM 1of2 SQP 1of2 WMO-S Gp GCF Sg CC Hp Cs Cs Hp Hp Fu Hp Sg Fu Hp Hp Sg Hv 1600 PLO PWRL SQM 2of2 SQP 2of2 ULW W20 W30 WA84F WCCHB.... WH WP-S WPYP Cs Cs Cs Zo LOB OAR OLV WL4 Pr 4800 4 5 Fixed Resistors Current Sense 2500 Series Low Value Metal Film Resistors Type Power Res. Range (watts) (ohms) 2 R025 - 1R0 2504 Tolerance % Max Volts 1, 2, 5, 10 - TCR Dim.(mm) l, dia (ppm/°C) +370 14.5 x 5.3 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/2500.PDF BCS Series 8W Current Sense Metal Alloy Resistors Type Power Res. Range (watts) (ohms) 8 R0005 - R01 BCS8 Tolerance % Max Volts 1, 5 - TCR Dim.(mm) l, h, t (ppm/°C) 50 12.8, 6.4, 2.5 Datasheet - http://www.bitechnologies.com/pdfs/BCS.PDF LOB Series Low Resistance Metal Element Resistors Power (watts) 1 1 1 Res. Range TCR Tolerance % Max Volts (ohms) (ppm/°C) 0.005 - 0.1 1-5 0.005 - 0.1 1-5 0.005 - 0.1 1-5 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/LOB.PDF Power (watts) 0.063 0.1 0.125, 0.25 Res. Range TCR Tolerance % Max Volts (ohms) (ppm/°C) R05 – 1R0 1, 5 200 – 400 R02 – 1R0 1, 5 200 – 600 R02 – 1R0 1, 5 200 - 600 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/LRCS.pdf Power (watts) 0.5 1.0 1.5/2.0 Res. Range TCR Tolerance % Max Volts (ohms) (ppm/°C) 0R003 - 1R 1, 2, 5 ±100 0R003 - 1R 1, 2, 5 ±100 0R003 - 1R 1, 2, 5 ±100 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/LRC-LRF.PDF Power Res. Range Type LOB-1 LOB-1 LOB-1 LRCS Series 0402 0603 0805 LR (F) Series Dim. (mm) l, w, h 1, 0.5, 0.32 1.6, 0.8, 0.45 2, 1.25, 0.55 Low Value Flat Chip Resistor Type 1206 2010 2512 Dim.(mm) l, w, h 3.2, 1.63, .8 5.23, 2.64, .8 6.5, 3.25, .8 Low Range 3 Watt SMT Chip Resistor LRF3W Series LRF3W 9.9, 3.6 9.9, 3.6 9.9, 3.6 Small Size Low Value Chip Resistor Type Type Dim.(mm) l, Dia (watts) 3 TCR Tolerance % Max Volts (ppm/°C) (ohms) 0R003 - 1R to ±1% 50 ±100 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/LRF3W.PDF Power Res. Range Dim.(mm) l, w, h 3.25, 6.5, 0.9 OAR Series Type OAR-1 OAR-2 OAR-3 Open Air Sense Resistors TCR OARS / OARS-XP Series Type Power (watts) OARS1 2 OARSXP 4 Dim.(mm) l, w, h Tolerance % Max Volts (ppm/°C) (ohms) 0R005 - 0.10 1, 5 to ±20 0R005 - 0.10 1, 5 to ±20 0R005 - 0.05 1, 5 to ±20 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/OAR.PDF (watts) 1 3 5 11.43, 1.65, 8.26 15.24, 1.65, 28.58 20.32, 1.65, 28.58 Surface Mount Sense Resistors Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) 1 - ±20 11.18, 3.175, 3.05 1, 5 - ±20 12, 6.4, 4.6 0R003 to 0R050 0R001 to 0R025 Dim.(mm) l, w, h Datasheet - http://www.welwyn-tt.com/pdf/datasheet/OARS.PDF Not for sale in Germany OLV Series Alloy Wire Shunt Resistors Type Power (watts) Res. Range (ohms) Tolerance % OLV1 OLV2 OLV3 1 2 3 R005 -R025 R005 - R05 R005 - 0R1 5 5 5 Max Volts TCR (ppm/°C) Pitch, h - 200 200 200 11.4, 7.6 12.7, 14.6 15.2, 22.6 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/OLV.PDF Fixed Resistors PLO Series Type PLO-3 PLO-5 PLO-7 PLO-10 Low Resistance Power Wirewound Resistors Power (watts) 3 5 7 10 TCR Tolerance % Max Volts (ppm/°C) (ohms) R005 - R18 1, 2, 3, 5, 10 30 - 500 R005 - R18 1, 2, 3, 5, 10 30 - 500 R01 - R18 1, 2, 3, 5, 10 30 - 500 R01 - R18 1, 2, 3, 5, 10 30 - 500 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/PLO.PDF Res. Range PWRL Series Dim.(mm) l, w, h 22.4, 7.87, 7.87 22.4, 9.65, 8.89 35.3, 9.65, 8.89 47.8, 9.65, 8.89 Low Resistance Stand-up Power Wirewound Resistors Type Power (watts) PWRL 3, 5, 7, 10 Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) 0R01 - 0R18 1, 2, 3, 5, 10 50 - 500 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/PWRL.PDF ULR Series Dim.(mm) l, w, 25.4, 12 (3W) Metal Strip Current Sense Resistors Surface Mount Type Power (watts) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, w, h ULR1S ULR1 ULR15S ULR2 ULR25 ULR3 1 1.0 1.5 2.0 2.5 3.0 R001 – R01 R0005 - R015 R001 – R01 R0005 - R01 R0035 - R006 R0005 - R003 1, 5 1, 5 1, 5 1, 5 1, 5 1, 5 - 50 50, 75, 100, 150 50 50 50 50, 75, 100 3.2, 1.6, 0.6 6.4, 3.2, 1.4 5.1, 2.5, 0.6 6.4, 3.2, 1.4 6.4, 3.2, 1.4 6.4, 3.2, 1.4 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/ULR.PDF High Value / Voltage 3810 Series Ultra-High Value Precision Resistors Type Power (watts) Res. Range (ohms) 3810 3811 3812 - 100M - 1T 100M - 1T 1T - 100T Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, dia 10, 20 1, 2, 5, 10 2, 5, 10 500 1000 1000 -500 to -3500 -500 to -3500 -500 to -3500 25, 6 42.9, 6 48, 6 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/3810.PDF 4500 Series High Voltage Planar Resistors Type Power (watts) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, w, h 4501 4502 4503 4504 4505 4506 1 1.7 2 3 2.8 3.6 20K - 500M 36K - 750M 36K - 750M 62K - 1G 51K - 1G 82K - 1G 1, 2, 5 1, 2, 5 1, 2, 5 1, 2, 5 1, 2, 5 1, 2, 5 10000 10000 15000 15000 20000 20000 100, 150 100, 150 100, 150 100, 150 100, 150 100, 150 25.7, 2, 9 25.7, 2, 13 38.7, 2, 9 38.7, 2, 13 51.2, 2, 9 51.2, 2, 13 4507 4.5 180K - 1.5G 1, 2, 5 20000 100, 150 51.2, 2, 25.7 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/4500.PDF 4530 Series High Voltage Planar Dividers Type Power (watts) Res. Range (ohms) 4531 4532 4533 4534 4535 4536 4537 1.0 1.7 2.0 3.0 2.8 3.6 4.5 20K - 130M 36K - 250M 36K - 250M 62K - 450M 51K - 370M 82K - 660M 180K - 1.4G Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, w, h 1, 2, 5 1, 2, 5 1, 2, 5 1, 2, 5 1, 2, 5 1, 2, 5 1, 2, 5 6500 6500 10000 10000 15000 15000 15000 100 100 100 100 100 100 100 25.7, 2, 9 25.7, 2, 13 38.7, 2, 9 38.7, 2, 13 51.2, 2, 9 51.2, 2, 13 51.2, 2, 25.7 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/4530.PDF F Series High Voltage Thick Film Resistors Type Power (watts) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, Dia F43 F44 0.7 1.3 2M - 100G 2M - 150G 2, 5, 10 2, 5, 10 4000 14000 -2000 -2000 25.4, 8.4 50.8, 8.4 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/F.PDF 6 7 Fixed Resistors GC Series High Value Thick Film Resistors Type Power (watts) Res. Range (ohms) Tolerance % GC55 GC65 GC70 0.25 0.5 1.0 47K - 1G 47K - 1G 47K - 1G 1, 2, 5 1, 2, 5 1, 2, 5 Max Volts TCR (ppm/°C) Dim.(mm) l, dia 1700 3500 10000 100 100 100 6.2, 2.5 9, 3.6 14.5, 5.3 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/GC.PDF HR Series High Value Surface Mount Resistors Type Power (watts) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, w, h 0503 0805 1005 1206 - 10M - 20G 100M - 50G 100M - 50G 100M - 50G 10 10 10 10 50 100 150 200 0 to -2500 0 to -2000 0 to -1500 0 to -1000 1.25, .63, .5 2, 1.25, .6 2.5, 1.25, .7 3.2, 1.6, .7 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/HR.PDF HVC Series High Voltage Chip Resistors Type Power (watts) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, w, h 1206 2010 2512 0.3 0.5 1 10K - 100M 10K - 100M 10K - 100M 10, 5, 2, 1 10, 5, 2, 1 10, 5, 2, 1 1000 2000 3000 100 100 100 3.2±0.4, 1.6±0.2, 0.7 5.1±0.3, 2.5±0.2, 0.8 6.5±0.3, 3.2±0.2, 0.8 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/HVC.PDF HVP Series Type HVP04 HVP06 HVP08 HVP10 HVP15 HVP20 High Voltage Planar resistors Power (watts) 0.4 0.6 0.8 1 1.5 2 Res. Range TCR Tolerance % Max Volts (ohms) (ppm/°C) 1K – 250M 1, 5 2000 100 1K5 – 500M 1, 5 5000 100 2K – 500M 1, 5 7500 100 3K – 500M 1, 5 10,000 100 4K – 750M 1, 5 15,000 100 5K – 1G 1, 5 20,000 100 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/HVP.pdf Lower Range High Voltage Chip LHVC Series Type Dim. (mm) l, w, h 10.2, 6.4, 2 12.7, 6.4, 2 19.1, 6.4, 2 25.4, 6.4, 2 38.1, 6.4, 2 50.8, 6.4, 2 Power (watts) 0603 0.1 0805 0.125 1206 0.25 2010 0.5 2512 1 * 2500 in development Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim. (mm) l, w, h 100K - 10M 100K – 10M 100K – 10M 50K – 10M 50K - 10M 1, 5 1, 5 1, 5 1, 5 1, 5 200 400 500 1600 800* 200 200 200 200 200 1.6, 0.8, 0.45 2, 1.3, 0.55 3.1, 1.6, 0.55 5, 2.5, 0.55 6.4, 3.2, 0.55 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/LHVC.pdf MH Series High Voltage Metal Film Resistors Type Power (watts) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, dia MH25 MH37 0.25 0.5 100K - 10M 100K - 1M 1, 2, 5 1, 2, 5 1600 3500 100 100 6.2, 2.3 9, 3.7 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/MH.PDF Precision High Voltage Divider PHVD Series Type PHVD10 PHVD15 PHVD20 PHVD30 PHVD40 Power (watts) 0.75 1.5 2.5 3.5 4.5 Res. Range TCR Tolerance % Max Volts (ohms) (ppm/°C) 1K – 7G 10,000 1K – 10G 15,000 1K – 20G 20,000 0.05, 0.1, 0.25, 0.5, 1 5, 10, 15, 25, 50 1K – 30G 30,000 1K – 40G 40,000 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/PHVD.PDF Dim. (mm) l, h, w 25.4, 7.6, 2.5 38.1, 12.7, 2.5 50.8, 15.2, 2.5 76.2, 15.2, 2.5 101.6, 15.2, 2.5 Fixed Resistors Precision High Voltage Planar Resistor PHVP Series Type PHVP5 PHVP7 PHVP7B PHVP10 PHVP10B PHVP10C PHVP15 PHVP15B PHVP15C PHVP20 PHVP20B PHVP20C PHVP30 PHVP40 Power (watts) 1 0.8 1 1 1.3 2 1.5 2 3 2 3 4.5 6.5 9 Res. Range TCR Tolerance % Max Volts (ohms) (ppm/°C) 1K – 3G 5000 1K – 1G 7000 1K – 2G5 7000 1K – 1G5 10,000 1K – 3G5 10,000 1K – 7G 10,000 1K – 4G 15,000 0.05, 0.1, 0.25, 10, 15, 0.5, 1 25, 50 1K – 5G 15,000 1K – 10G 15,000 1K – 7G 20,000 1K – 10G 20,000 1K – 20G 20,000 1K – 30G 30,000 1K – 40G 40,000 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/PHVP.PDF T Series Dim. (mm) l, h, w 12.7, 5.1, 2 20.3, 3.8, 2 20.3, 5.1, 2.5 25.4, 3.8, 2 25.4, 5.1, 2.5 25.4, 7.6, 2.5 38.1, 3.8, 2 38.1, 5.1, 2.5 38.1, 12.7, 2.5 50.8, 5.1, 2 50.8, 6.4, 2.5 50.8, 15.2, 2.5 76.2, 15.2, 3 101.6, 15.2, 3 High Voltage Precision Thick Film Resistors Type Power (watts) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, dia T43 T44 T48 1.5 3.5 10 1K - 10G 1K - 50G 1K - 50G 1, 2, 5 1, 2, 5 1, 2, 5 4000 14000 50000 25, 50, 100 25, 50, 100 25, 50, 100 25.4, 8.4 50.8, 8.4 150, 8.4 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/T.PDF VRW Series High Voltage Thick Film Resistors Type Power (watts) Res. Range (ohms) Tolerance % VRW25 VRW37 VRW68 0.25 0.5 1 100K to 30M 100K to 10M 100K – 68M 1, 2, 5 1, 2, 5 1, 2, 5 Max Volts TCR (ppm/°C) Dim.(mm) L, D 1600 3500 10000 200 200 200 6.2, 2.5 9.0, 3.7 15.5, 5 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/VRW.PDF WHVL Series Type WHVL2 WHVL3 WHVL5 WHVL7 WHVL10 WHVL12 WHVL15 Precision Low Inductance High Voltage Resistors Power (watts) 2.9 3.8 5.6 7.5 10 12 15 TCR Tolerance % Max Volts (ppm/°C) (ohms) 1K – 100G 11,000 1K – 100G 14,000 1K – 100G 22,000 10, 15, 25, 50, 1K – 100G 33,000 0.05, 0.1, 0.25, 0.5, 1, 2, 5 100 1K – 100G 45,000 1K – 100G 54,000 1K – 100G 67,000 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/WHVL.PDF Res. Range Type l, dia 27, 8 37, 8 52, 8 77, 8 102, 8.3 122, 8.5 152, 8.5 Capacitor Mount Balance/ Bleed Resistor WPYP Series WPYP8 WPYP10 Dim. (mm) Power (watts) 10 13 Res. Range TCR Tolerance % Max Volts (ohms) (ppm/°C) 1R0 – 82K 1, 2, 5 685 100 1R0 – 120K 1, 2, 5 940 100 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/WPYP.pdf Dim. (mm) Pitch 22 31.8 Surge / Pulse Carbon Composition Resistors CC Series Type Power (watts) Res. Range (ohms) Tolerance % CC1 CC2 1 2 100R – 50K 100R – 10K 10, 20 10, 20 Max Volts TCR (ppm/°C) Dim. (mm) l, dia - 1000 1000 15, 6 18, 8 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/CC.pdf CHP Series Metal Glaze™ Surface Mount Power Resistors Type Power (watts) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, dia CHP1/8 CHP1/2 CHP1 CHP2 0.25 0.5 1 1.33 0R1 - 1M 0R1 - 350K 0R1 - 2M2 0R1- 2M2 1, 2, 5 1, 2, 5 1, 2, 5 1, 2, 5 200 300 350 500 50, 100 50, 100 50, 100 50,100 3.25, 1.45 5.08, 2.01 6.38, 2.10 9.32, 2.67 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/CHP.PDF EN 60065 8 9 Fixed Resistors DSC Series Double Sided Chip Type Power (watts) Res. Range (ohms) Tolerance % 1206 2010 2512 0.33 0.75 1.5 IR0 - 4M7 IR0 - 4M7 IR0 - 4M7 0.5, 1, 2, 5 0.5, 1, 2, 5 0.5, 1, 2, 5 Max Volts TCR (ppm/°C) Dim.(mm) l, w, h 200 400 500 100 - 200 100 - 200 100 - 200 3.2, 1.6, 0.7 5.1, 2.5, 0.8 6.5, 3.2, 0.8 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/DSC.PDF PWC Series Pulse Withstanding Chip Resistors Type Power (watts) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, w, h 0805 1206 2010 2512 0.125 0.33 0.75 1.5 1R0 - 10M 1R0 - 10M 1R0 - 10M 1R0 - 10M 0.5, 1, 2, 5 0.5, 1, 2, 5 0.5, 1, 2, 5 0.5, 1, 2, 5 150 200 400 500 100 - 200 100 - 200 100 - 200 100 - 200 2.0,1.25, 2.0 3.2, 1.6, 0.7 5.1, 2.5, 0.8 6.5, 3.2, 0.8 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/PWC.PDF W30 Series Type W31 Flameproof Wirewound Resistor Power (watts) 3 Res. Range (ohms) Tolerance % WP1S WP2S WP25S WP3S WP4S WP5S TCR (ppm/°C) <R1: 5 R01 – 10K 500 100 - 1000 ≥R1: 1, 2, 5 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/W30.PDF Dim.(mm) l, dia 13, 5.6 Compact Flameproof Power Wirewound Resistors WP-S Series Type Max Volts Power (watts) 1 2 2.5 3 4 5 TCR Tolerance % Max Volts (ppm/°C) (ohms) R068 to 430R <20r: 5 20R: 1,2,5 50 <1R: 350 1R: 200 R05 to 900R <20r: 5 20R: 1,2,5 50 <1R: 350 1R: 200 R05 to 900R <20r: 5 20R: 1,2,5 75 <1R: 350 1R: 200 R01 to 2K2 <20r: 5 20R: 1,2,5 100 <1R: 350 1R: 200 R01 to 10K <R10:5 R10: 1,2,5 100 <1R: 350 1R: 200 R015 to 6K8 <20r:5 20R: 1,2,5 150 <1R: 350 1R: 200 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/WP-S.PDF Res. Range Dim.(mm) l, dia 6.2, 2.8 9.0, 3.6 12.5, 4.5 14.5, 5.2 13, 5.6 16.5, 7.0 High Power 1600/1900 Series Tubular Vitreous Enamelled Wirewound Resistors Type Power (watts) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, dia 1601 1905 1600 1602 1906 1603 1604 1605 1908 1607 1606 1608 1609 11 16 16.5 17 22 25 35 47 54 76 91 115 165 1 - 15K 1 - 30K 1 - 56K 1 - 43K 1 - 50K 1 - 83K 1 - 100K 1 - 100K 1 - 100K 1 - 100K 1 - 160K 1 - 180K 1 - 250K 1, 2, 5, 10 1, 2, 5, 10 1, 2, 5, 10 1, 2, 5, 10 1, 2, 5, 10 1, 2, 5, 10 1, 2, 5, 10 1, 2, 5, 10 1, 2, 5, 10 1, 2, 5, 10 1, 2, 5, 10 1, 2, 5, 10 1, 2, 5, 10 250 450 600 500 700 850 1300 1100 1200 1300 2100 2100 3000 75 - 200 75 - 200 75 - 200 75 - 200 75 - 200 75 - 200 75 - 200 75 - 150 75 - 150 75 - 150 75 - 150 75 - 150 75 - 150 33, 17.5 56.1, 14.5 61.5, 14.5 51, 17.5 64.3, 17.5 74.5, 17.5 102, 17.5 89.5, 24 102, 24 102, 32 166, 24 152, 32 216, 32 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/1600-1900.PDF BHPR Series Type BHPR TO-227 High Power Single/Dual Resistors Power Res. Range (watts) (ohms) 150, 200, 250, 300, 550, 600 0R1 - 1K0 Tolerance % Max Volts 1, 5 - TCR (ppm/°C) 100 Dim.(mm) l, w, h 38, 25, 11.8 Datasheet - http://www.bitechnologies.com/pdfs/BHPR.PDF BPC Series Type BPC3 PBC5 BPC7 BPC10 Planar Power Resistors Power Res. Range (watts) (ohms) 3 5 7.5 10 0R1 - 200K 0R1 - 200K 0R1 - 200K 0R1 - 200K Tolerance % Max Volts 1, 2, 5, 10 1, 2, 5, 10 1, 2, 5, 10 1, 2, 5, 10 500 500 500 500 TCR (ppm/°C) 100 100 100 100 Datasheet - http://www.bitechnologies.com/pdfs/BPC.PDF Dim.(mm) l, h, t 10.2, 27.7, 2.5 12.7, 27.7, 2.5 19.1, 27.7, 2.5 25.4, 27.7, 2.5 Fixed Resistors BPR Series Type BPR3 PBR5 BPR7 BPR10 BPR20 BPR30 BPR40 BPR50 Vibration-proof Planar Power Resistors Power (watts) 3 5 7 10 20 30 40 50 TCR Tolerance % Max Volts (ppm/°C) (ohms) 0R1 - 200K 1, 2, 5 500 100 0R1 - 200K 1, 2, 5 500 100 0R1 - 200K 1, 2, 5 500 100 0R1 - 200K 1, 2, 5 500 100 0R1 - 200K 1, 2, 5 500 100 0R1 - 200K 1, 2, 5 500 100 0R1 - 200K 1, 2, 5 500 100 0R1 - 200K 1, 2, 5 500 100 Datasheet - http://www.bitechnologies.com/pdfs/BPR.PDF Res. Range HTCR Series Type 0805 1206 2010 2512 MFP1 MFP2 Power (watts) 0.125 0.25 0.625 1 TCR Tolerance % Max Volts (ppm/°C) (ohms) 1R0 - 10M 1, 5 150 100 - 200 1R0 - 10M 1, 5 200 100 - 200 1R0 - 10M 1, 5 400 100 - 200 1R0 - 10M 1, 5 500 100 -200 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/HTCR.PDF Res. Range MF1/2S MF1S MF2S MF3S MHP20S MHP20 MHP35 MHP50 MHP100 MHP140 2, 1.3, 0.5 3.2, 1.6, 0.5 5, 2.5, 0.65 6.3, 3.2, 0.65 (watts) 1 2 TCR Tolerance % Max Volts (ppm/°C) (ohms) 0R1 - 1M 1, 2, 5 350 100, 200, 300 1R0 - 1M 1, 2, 5 350 100 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/MFP.PDF Res. Range Dim.(mm) l, dia 6.2, 2.5 10, 4 Power Metal Film Resistors Power (watts) 0.5 1.0 2.0 3.0 Res. Range TCR Tolerance % Max Volts (ohms) (ppm/°C) 0R1 - 1M 1, 2, 5, 10 350 150 - 350 0R1 - 1M 1, 2, 5, 10 350 150 - 350 0R1 - 470K 1, 2, 5, 10 350 150 - 350 0R1 - 470K 1, 2, 5, 10 350 150 - 350 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/MF-S.PDF Power Res. Range MHP Family Type Dim.(mm) l, h, t Flameproof Power Metal Film Resistors Power MF-S Series Type 12.7, 17, 6.1 12.7, 27.2, 6.1 25.4, 20.8, 6.1 25.4, 27.2, 6.1 50.8, 27.2, 6.1 53.3, 37.3, 6.1 53.3, 50.0, 6.1 53.3, 57.7, 6.1 High Temperature Chip Resistors MFP Series Type Dim.(mm) l, h, t Dim.(mm) l, dia 6.2, 2.5 9, 3.6 12.5, 4.2 14.5, 5.3 Heatsink Mount Packaged Power Resistors (watts) 20 20 35 50 100 140 TCR Tolerance % Max Volts (ppm/°C) (ohms) R01 - 51K 1, 5 50 - 250 R01 - 51K 1, 5 500 50 - 250 R01 - 51K 1, 5 500 50 - 250 R01 - 51K 1, 5 500 50 - 250 R01 - 51K 1, 5 700 50 - 250 R01 - 51K 1, 5 700 50 - 250 Datasheets - http://www.bitechnologies.com/power/index.htm SC3 Series Package TO-126 TO-220 TO-220 TO-220 TO-247 TO-247 High Power Chip Resistor Type Power (watts) Res. Range (ohms) Tolerance % SC3 3 1R0 - 10K 1, 2, 5 Max Volts TCR (ppm/°C) Dim.(mm) l, w, h 50 100 3.25, 6.5, Datasheet - http://www.welwyn-tt.com/pdf/datasheet/SC3.PDF SMHP Series Type SMHP TO-263 Packaged Power Resistors Power (watts) 20 TCR Tolerance % Max Volts (ppm/°C) (ohms) R01 - 51K 1, 5 500 50 - 250 Datasheet - http://www.bitechnologies.com/pdfs/SMHP.PDF Res. Range Dim.(mm) l, w, h 10.3, 10.1, 4.5 10 11 Fixed Resistors SMP Series SOIC Packaged Power Resistors TCR Res. Range Range TCR Res. Tolerance Max Tolerance % % Max Volts Volts (ppm/°C) (ohms) (ppm/°C) (ohms) 10R -- 10K 10K 1, 5 5 500 100 10R 1, 500 100 Datasheet http://www.bitechnologies.com/pdfs/SMP.PDF Datasheet -- http://www.bitechnologies.com/pdfs/SMP.PDF Power Power (watts) (watts) 10 10 Type Type SMP SMP SQM Series 11.3, 8.4 8.4 11.3, Ceramic Case Pluggable Resistor Power (watts) 2 3 5 7 10 Type SQM2 SQM3 SQM5 SQM7 SQM10 Res. Range TCR Tolerance % Max Volts (ohms) (ppm/°C) 0R1 – 33K 5 150 350, 400 0R1 – 56K 5 300 350, 400 0R1 – 100K 5 350 350, 400 0R1 – 200K 5 500 350, 400 0R1 – 200K 5 750 350, 400 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/SQM.pdf SQP Series Type Dim.(mm) Dim.(mm) l,l, w, w, Dim. (mm) h, w, d 20, 11.5, 7.5 25, 12.5, 8.5 25, 12.5, 9 38, 12.5, 9 50, 12.5, 9 Ceramic Case Resistors - Wirewound / Metal Oxide Power Res. Range (watts) (ohms) 2 3 5 7 10 15 20 0R1-47K 0R1-47K 0R1 - 47K 0R1 - 47K 0R1 - 68K 0R1- 68k 0R1-100K SQP2 SQP3 SQP5 SQP7 SQP10 SQP15 SQP20 Tolerance % Max Volts 5 5 5 5 5 5 5 150 300 350 500 750 1000 1000 TCR (ppm/°C) WW types, <0R68, 1700ppm; 0R68, 200ppm: MO types all values 350ppm Dim.(mm) l, w, h 18, 7, 7 22, 8, 8 22, 10, 10 35, 10, 10 48, 10, 10 48, 13, 13 60, 14.5, 14.5 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/SQP.PDF W20 Series Vitreous Enamelled Wirewound Resistors Type Power (watts) W21 W215 W22 W23 W24 3.0 5.0 7.0 10.0 14.0 Res. Range (ohms) Tolerance % TCR (ppm/°C) Max Volts 0R1 - 10K 1, 2, 5 100 +75 to 200 0R1 - 15K 1, 2, 5 160 +75 to 200 0R1 - 22K 1, 2, 5 200 +75 to 200 0R15 - 60K 1, 2, 5 500 +75 to 200 0R2 - 100K 1, 2, 5 750 +75 to 200 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/W20.PDF WA80Z Series Dim.(mm) l, dia 12.7, 5.6 22, 7 22, 8 38, 8 53.5, 8 Cement Coated Surface Mount Wirewound Resistors Type Power (watts) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, w, h WA83Z WA84Z WA85Z 2 3 5 0.05 - 900R 0.01 - 2K2 0.015 - 6K8 <0R1:5,10 0R1:1,2,5,10 1, 2, 5, 10 50 100 150 <1R: 350 1R: 200 <1R: 350 1R: 200 <1R: 350 1R: 200 13.4±0.2, 3.6, 6.2 18.7±0.2, 5.2, 7.0 18.7, 7.0, 7.9 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/WA80Z.PDF WDBR Series Ultra Low Profile Dynamic Braking Resistors Type Power (watts) WDBR1/2 WDBR1 WDBR2 WDBR3 WDBR5 WDBR7 300 700 780 900 1000 1490 Res. Range (ohms) Tolerance % WCDH600 WCCHB110 WCDH900 WCCHB166 WCDH1300 WCCHB216 WCCHB270 WCCHB320 TCR (ppm/°C) 22R – 100R 10 +500 - +600 12R – 150R 10 +500 - +600 12R – 150R 10 +500 - +600 12R – 150R 10 +500 - +600 12R – 150R 10 +500 - +600 47R – 150R 10 +500 - +600 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/WDBR.PDF WCCHB / WCDH Series Type Max Volts Dim.(mm) l, w 31.9, 28.1 49.3, 35.9 61, 40.6 102, 70 122, 70 152, 102 Low Profile Aluminium Housed Wirewound Resistors Power Res. Range (watts) (ohms) 600 650 900 950 1300 1400 1600 1800 2R2 - 200R 2R2 - 200R 3R3 - 250R 3R3 - 250R 3R3 - 300R 3R3 - 300R 4R7 - 390R 5R1 - 470R Tolerance % Max Volts 5, 10 5, 10 5, 10 5, 10 5, 10 5, 10 5, 10 5, 10 - TCR (ppm/°C) 100 100 100 100 100 100 100 100 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/WCCHB.PDF Dim.(mm) l, w, h 102, 68, 12.5 110, 76, 15 145, 68, 12.5 166, 76, 15 195, 68, 12.5 216, 76, 15 270, 76, 15 320, 76, 15 CECC 40201-002 Fixed Resistors WH Series Aluminium Housed Wirewound Resistors Power Type (watts) 10 15 25 50 100 200 300 WH5 WH10 WH25 WH50 WH100 WH200 WH300 TCR Res. Range Tolerance % Max Volts (ppm/°C) (ohms) 0R01 - 10K 1, 2, 5, 10 150 50, 100 0R01 - 20K 1, 2, 5, 10 250 50, 100 0R01 - 44K 1, 2, 5, 10 500 50, 100 0R015 - 120K 1, 2, 5, 10 1250 50,100 0R01 – 70K 1, 2, 5, 10 1900 25, 100 0R01 – 50K 1, 2, 5, 10 1900 25, 100 0R01 – 68K 1, 2, 5, 10 2500 25, 100 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/WH.PDF WHPC Series Type 1206 0612 2010 1020 1218 1225 CECC 40203-006 Dim.(mm) l, w, h 30, 17, 9 36.5, 21, 11 51, 28, 15 72.5, 30, 16 88, 47.5, 24.1 146, 72.5, 41.8 184, 72.5, 41.8 High Power Chip Power Res. Range (watts) 0.5 0.5 1 1 1 1.5 (ohms) 1R – 10M 1R – 1M 1R – 10M 1R – 1M 1R – 1M 1R – 1M Tolerance % Max Volts 1, 5 1, 5 1, 5 1, 5 1, 5 1, 5 200 200 200 200 200 200 TCR Dim. (mm) (ppm/°C) 100 – 200 100 - 400 100 - 200 100 - 400 100 - 400 100 - 400 l, w, h 3.1, 1.6, 0.55 1.6, 3.2, 0.55 5, 2.5, 0.55 2.5, 5, 0.55 3.1, 4.6, 0.55 3.1, 6.3, 0.55 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/WHPC.pdf WMO-S Series Type WMO1/2S WMO1S WMO1S WMO3S WMO5S WMO7S Flameproof Metal Oxide Resistors Power (watts) 0.5 1.0 1.0 3.0 5.0 7 Res. Range TCR Tolerance % Max Volts (ohms) (ppm/°C) 10R -100K 5 250 350 10R - 120K 5 350 350 10R - 150K 5 350 350 10R - 150K 5 350 350 10R - 180K 5 500 350 20R - 150K 5 750 350 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/WMO-S.PDF WSM Series Dim.(mm) l, dia 7.5, 3 10, 4.5 10, 4.5 16, 5.5 26, 8.5 32, 8.5 Moulded Surface Mount Wirewound Resistors Type Power (watts) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, w, h WSM1 WSM2 WSM3 1 2 3 0R01 - 1K 0R01 - 2K 0R01 - 3K 1, 2, 5, 10 1, 2, 5, 10 1, 2, 5, 10 100 100 100 20 - 100 20 - 100 20 - 200 7.9, 7, 3.94 12, 10.5, 5.5 18, 16, 6.5 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/WSM.PDF Precision Ultra Precision Bulk Metal Foil Resistors 4800 Series Type Power (watts) Res. Range (ohms) 4802/12/32 0.5 1R0 to 100K 4804 4805 1 1.5 0R5 to 200k 33R0 to 300K Tolerance % Max Volts TCR (ppm/°C) 0.005, 0.01 0.02, 0.05 0.01, 0.25, 0.5, 1 200 5 350 500 5 5 Dim.(mm) l, w, h 8.9, 10.2, 3.8, 7.5, 8, 2.5 9.7 5.4 9.7 15.2, 13.2, 3.8 22.6, 13.2, 3.8 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/4800.PDF Ultra Precision Metal Film Resistors CAR Series Type Power (watts) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, dia CAR5 CAR6 CAR7 0.25 0.33 0.5 10R0 - 3M 10R0 - 5M 10R0 - 10M 0.01, 0.02, 0.05, 0.1, 1.0 250 350 500 5, 10, 15, 25, 50 7.2, 2.5 10, 3.7 15.5, 5.5 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/CAR.PDF MAR 40/42 Series Type Ultra Precision Metal Film Resistors Power Res. Range (watts) (ohms) 0.3 20R0 - 400K Max Volts TCR (ppm/°C) 0.005, 0.01 MAR 40 MAR 42 Tolerance % 0.02, 0.05 Dim.(mm) l, w, h 7.75, 3.3, 8.64 250 2, 5 0.01, 0.25, 0.5, Datasheet - http://www.welwyn-tt.com/pdf/datasheet/MAR_40-42.PDF 8.25, 3.3, 8.64 CECC 40302-002 12 13 Fixed Resistors PCF Series Precision Surface Mount Resistor Power (watts) Type Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, w, h 15 25 50 100 150 150 150 150 25, 50 5 - 50 5 - 50 5 - 50 5 - 50 5 - 50 5 - 50 5 - 50 0.6, 0.3, 0.26 1, 0.5, 0.4 1.6, 0.8, 0.55 2, 1.3, 0.65 3.2, 1.6, 0.65 3.2, 2.6, 0.5 4.9, 2.4, 0.65 6.3, 3.1, 0.65 0201 0.031 50R - 33K 0.5, 1 0402 0.063 10R - 205K 0.01 – 0.5 0603 0.063 2R – 1M 0.01 – 0.5 0805 0.1 1R – 2M 0.01 – 0.5 1206 0.125 1R – 2M5 0.01 – 0.5 1210 0.2 1R – 2M5 0.01 – 0.5 2010 0.25 1R – 3M 0.01 – 0.5 2512 0.5 1R – 3M 0.01 – 0.5 High Power (PCFH) and Passivated (PCFP) versions available Datasheet - http://www.welwyn-tt.com/pdf/datasheet/PCF.pdf PCR Series Precision Thick Film Surface Mount Resistors Type Power (watts) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, w, h 0805 1005 1206 0.1 0.125 0.25 10R - 1M 10R - 1M 10R - 1M 0.1 - 1 0.1 - 1 0.1 - 1 100 150 200 50 50 50 2, 1.25, .6 2.5, 1.25, .7 3.2, 1.6, .7 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/PCR.PDF PFC-A Series TaNFilm® Precision Chip Attenuator Type Power (watts) Atten, Range (dB) impedance (ohms) Tolerence (dB) Dim.(mm) l, w, h 1206 0.125 1 -20 50, 75 0.3 3.2, 1.6 0.6 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/PFC-A.pdf PFC-D Series Precision 1206 Resistive Dividers Type Power Res. Range (watts) (ohms) PFC-D 0.25 10R - 200K Tolerance % Max Volts 0.05, 0.1, 0.5, 1 100 TCR (ppm/°C) 25, 50, 100 Dim.(mm) l, w, t 3.2, 1.6, 0.6 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/PFC-DIVIDER.PDF Precision Metal Film Resistors PR Series Type PR4 PR5 Power (watts) 0.25 0.5 TCR Res. Range Tolerance % Max Volts (ppm/°C) (ohms) 100R - 1M 250 15, 25, 50 0.1, 0.25, 0.5, 1 100R - 1M 350 15, 25, 50 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/PR.PDF RC Series Dim.(mm) l, dia 6.2, 2.5 9, 3.6 Precision Metal Film Resistors Type Power (watts) Res. Range (ohms) Tolerance % RC55 RC65 RC70 0.25 0.5 1.0 5R – 2M 5R – 2M 10R – 5M 0.05, 0.1, 0.25 Max Volts TCR (ppm/°C) Dim.(mm) l, dia 350 350 500 5, 10, 15, 25, 7.2, 2.5 10, 3.7 15.5, 5.5 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/RC.PDF Precision Metal Film Resistors RCP Series Type Power (watts) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, dia RC55P RC65P RC70P 0.5 1.0 1.5 5R – 2M 5R – 2M 10R – 5M 0.05, 0.1, 0.25 350 500 500 5, 10, 15, 25 7.2, 2.5 10, 3.7 15.5, 5.5 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/RCP.PDF SOT143 Series 4 Pin SMT Package Type Power (watts) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, w, h SOT 0.25 10R -100K 0.05 100 Track ±5 2.9, 1.3, 1 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/SOT143.pdf SOT23 Series Surface Mount Divider Network Type Power (watts) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, w, h SOT 0.25 10R -100K 0.05 100 Track ±5 2.9, 1.3, 1 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/SOT23.pdf CECC 40101-004/804 Fixed Resistors WBC Series TaNSil® Wire Bondable Silicon Chip Resistors Type Power (watts) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, w, h 0202 0303 0.25 0.25 10R - 100K 10R - 100K to 0.05 to 0.05 100 100 ±25 Track 2 0.51, 0.51 0.76, 0.76 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/WBC.PDF WRM Series Mini Melf Resistors Type Power (watts) Res. Range (ohms) Tolerance % 0102 0204 0207 0.2 0.25 0.4 R22 - 2M21 R22 - 5M1 R16 - 10M 0.1, 0.25, 0.5, 1, 2, 5 Max Volts TCR (ppm/°C) Dim.(mm) l, dia 150 200 250 15, 25, 50 5, 15, 25, 50 25, 50 2.2, 1.1 3.6, 1.4 6, 2.2 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/WRM.PDF Fusible EMC Series Pulse Withstanding Fusible Flameproof Metal Film Resistors Type Power (watts) Res. Range (ohms) Tolerance % EMC2 2 4R7 - 68R 10, 20 Max Volts TCR (ppm/°C) Dim.(mm) l, dia - 100 10, 4 UL1412 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/EMC.PDF Fusing Surface Mount Resistors FCR Series Type Power (watts) Res. Range (ohms) Tolerance % 0603 0805 1206 1210 2010 0.063 0.1 0.125 0.25 0.5 5R6 – 33R 10R – 82R 10R – 82R 10R - 300R 10R - 100R ±5 ±5 ±5 ±5 ±5 Max Volts TCR (ppm/°C) Dim.(mm) l, w, h - ±500 ±500 ±500 ±500 ±500 1.6, 0.8, 0.7 2, 1.3, 0.7 3.2, 1.6, 0.7 3.2, 2.6, 0.70 5, 2.5, 0.71 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/FCR.PDF FM Series Fusible Metal Film Resistors Type Power (watts) Res. Range (ohms) Tolerance % FM1/4 FM1/2 FM1 0.25 0.5 1 0R1 - 10K 0R1 - 27K 0R2 - 1K5 5 5 5 Max Volts TCR (ppm/°C) Dim.(mm) l, dia 250 350 350 250 250 250 6.2, 2.3 9, 3.4 12.5, 4.2 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/FM.PDF UL1412 Wirewound Mains Input Resistor ULW Series Type Power (watts) Res. Range (ohms) Tolerance % ULW2 ULW3 ULW4 ULW5 2 3 4 5 22R – 100R 10R – 100R 10R 4R7 - 100R 5 5 5 5 Max Volts TCR (ppm/°C) Dim. (mm) l, dia - 200 200 200 200 9, 3.6 14.5, 5.2 13, 5.6 16.5, 7.2 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/ULW.pdf WA84F Series Fusible Wirewound Resistors Type Power (watts) Res. Range (ohms) Tolerance % WA84F 1.6 0R2 - 30R 5 Max Volts TCR (ppm/°C) Dim.(mm) l, dia 100 100 - 350 14.5, 5.2 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/WA84F.PDF UL1412 14 15 Fixed Resistors High Reliability CR Series Surface Mount Resistors Type Power (watts) Res. Range (ohms) Tolerance % 0503 0805 1005 1206 2010 2512 0.063 0.125 0.125 0.25 0.5 1.0 1R - 10M 1R - 100M 1R - 100M 1R - 100M 1 - 1M 1 - 1M 0.1 - 5 0.1 - 5 0.1 - 5 0.1 - 5 0.1 - 5 0.1 - 5 Max Volts TCR (ppm/°C) Dim.(mm) l, w, h 50 100 150 200 400 500 100 100 100 100 100 100 1.25, .63, .5 2, 1.25, .6 2.5, 1.25, .7 3.2, 1.6, .7 5.1, 2.5, .7 6.5, 3.2, .7 CECC 40401-003/004/008 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/CR.PDF MFR Series Type MFR3 MFR4 MFR5 Metal Film Resistors Power (watts) 0.4 0.5 0.75 Res. Range TCR Tolerance % Max Volts (ohms) (ppm/°C) 1R0 - 1M 1 200 50 1R0 - 1M 0.5, 1 350 50 1R0 - 1M 0.5, 350 100 - 150 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/MFR.PDF PFC Series Type 3.5, 1.8 6.2, 2.5 9, 3.6 TaNFilm® Precision Chip Resistors Power (watts) Res. Range (ohms) Tolerance % Max Volts 0402 0.05 50R – 30K 0.1 - 5 75 0603 0.1 5R – 100K 0.02 - 5 75 0805 0.25 5R – 267K 0.02 - 5 100 1206 0.33 5R – 1M 0.02 - 5 200 1505 0.35 5R – 1M 0.02 - 5 100 2010 0.8 5R – 1M 0.02 - 5 175 2512 1 5R – 1M 0.02 - 5 200 High Temperature (PFC-HT) and High Frequency (PFC-HF) versions available TCR (ppm/°C) Dim.(mm) l, w, h 25 - 100 10 - 100 10 - 100 10 - 100 25 - 100 25 - 100 25 - 100 1, 0.5, 0.3 1.6, 0.8, 0.5 2.1, 1.3, 0.5 3.2, 1.6, 0.6 3.9, 1.3, 0.6 5.2, 2.6, 0.6 6.5, 3.1, 0.6 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/PFC.pdf Datasheet - http://www.welwyn-tt.com/pdf/datasheet/PFC-HT.pdf Datasheet - http://www.welwyn-tt.com/pdf/datasheet/PFC-HF.pdf Temperature Sense PTCR Series PTC Thermistor Chip Type Power (watts) Res. Range (ohms) Tolerance % 0805 1206 0.1 0.2 10R - 400R 10R - 800R 2, 5, 10 2, 5, 10 Max Volts TCR (ppm/°C) Dim (mm) l, w, h 100 200 2200 - 3500 2200 - 3500 2, 1.25, 0.6 3.2, 1.6, 0.7 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/PTCR.PDF RTD Series Type 0603 0805 1206 Platinum Film Temperature Sensors Power Res. Range (watts) (ohms) - 100R 100R 100R & 1K0 Tolerance % Max Volts 0.5, 1, 2, 5 0.5, 1, 2, 5 0.5, 1, 2, 5 - TCR (ppm/°C) +3850 +3850 +3850 Dim.(mm) l, w, t 1.6, 0.8, 0.5 2.1, 1.3, 0.5 3.2, 1.6, 0.6 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/RTD.PDF TD4 Series Nickel Film Temperature Sensor Type Power (watts) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, dia TD4 - 20R - 1K 1.0, 2.0, 4.0 - 6000 7.2, 2.5 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/TD4.PDF CECC 40101-019/803 Dim.(mm) l, dia MIL-PRF-55342 Fixed Resistors Zero-Ohm Jumper High Current Jumper Chip LRZ Series Type Current (amps) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, w, t 0805 15 0.003 max - - - 2.0, 1.25, 0.61 1206 20 0.003 max - - - 3.2, 1.25, 0.61 2010 30 0.003 max - - - 5.23, 2.64, 0.74 2512 35 0.003 max - - - 6.5, 3.25, 0.74 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/LRZ.pdf WL4 Series Jumper Resistors Type WL4 WLT Power Res. Range (watts) - (ohms) 0.012 max Tolerance % Max Volts TCR (ppm/°C) Wire link taped, 0.6 / 0.7 / 0.8mm dia x 52mm Datasheet - http://www.welwyn-tt.com/pdf/datasheet/WL4.PDF Dim.(mm) l, dia 6.2, 2.3 General Purpose CRT Series Trimmable Surface Mount Resistors Type Power (watts) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, w, h 0805 1206 1210 0.1 0.125 0.25 10R - 1M 10R - 1M 10R - 1M ±20 ±20 ±20 100 200 200 250 250 250 2, 1.25, .5 3.2, 1.6, .55 3.2, 2.6, .55 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/CRT.PDF GCF Series General Purpose Carbon Film Resistors Type GCF1/8 GCF1/4 GCF1/4S GCF1/2 GCF1/2S GCF1 GCF1S GCF2 GCF2S GCF3S Power (watts) 0.125 0.25 0.25 0.5 0.5 1.0 1.0 2.0 2.0 3.0 Res. Range TCR Tolerance % Max Volts (ohms) (ppm/°C) 1R0 -10M 5 200 1R0 -10M 5 250 1R0 -10M 5 200 <10R : 0 ±350 1R0 -10M 5 350 10R ~ <60K : 0 ~ -500 1R0 -10M 5 250 60K ~ <200K : 0 ~ -700 1R0 -10M 5 500 200K ~ <1M0 : 0 ~ -1000 1R0 -10M 5 400 1M0 ~ 10M : 0 ~ -1500 1R0 -10M 5 500 1R0 -10M 5 500 1R0 -10M 5 500 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/GCF.PDF Power (watts) 0.6 Res. Range TCR Tolerance % Max Volts (ohms) (ppm/°C) R22 - 1M 1, 2, 5, 250 50 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/MFR4P.PDF MFR4P Series Type MFR4P Dim.(mm) l, dia 3.5, 1.85 6.8, 2.5, 3.5, 1.85 10, 3.5 6.8, 3 16, 5.5 12, 5 17.5, 6.5 16, 5.5 17.5, 6.5 Metal Film Resistors WCR Series Dim.(mm) l, dia 6.2, 2.5 General Purpose Surface Mounted Resistors Type Power (watts) Res. Range (ohms) Tolerance % Max Volts TCR (ppm/°C) Dim.(mm) l, w, h 0201 0402 0603 0805 1206 1210 2010 2512 0.05 0.1 0.063 0.125 0.25 0.25 0.5 1.0 10R – 1M 10R – 1M 1R – 10M 1R – 10M 1R – 10M 1R – 10M 1R – 10M 1R – 10M 1 1 1 1 1 1 1 1 25 50 50 150 200 200 200 200 250 100 100 100 100 100 200 200 0.6, 0.3, 0.23 1, .5, .35 1.6, .8, .5 2, 1.25, .5 3.2, 1.6, .55 3.2, 2.6, 0.55 5, 2.5, .56 6.3, 3.2, .56 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/WCR.PDF WNCR Series Resistor Array Type Power (watts) Res. Range (ohms) Tolerance % WNCR 0.063 10 - 1M ±5 Max Volts TCR (ppm/°C) Dim.(mm) l, w, h 50 ±200 3.2, 1.6, .45 Datasheet - http://www.welwyn-tt.com/pdf/datasheet/WNCR.PDF 16 17 Fixed Resistors Colour Code for Band-marked Resistors Value 1 Silver Gold Black Brown Red Orange Yellow Green Blue Violet Grey White Blank Value 2 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 Value 3 Multiplier 0 1 2 3 4 5 6 7 8 9 x 0.01 x 0.1 x1 x 10 x 100 x 1K x 10K x 100K x 1M x 10M x 100M x 1G Tolerance 10% 5% K J 1% 2% F G 0.5% 0.25% 0.1% 0.05% D C B A 20% M Example 1 5-Band Marking E24/E96 values 4 7 0 x100 1% = 47K 1% Example 2 4-Band Marking E24/E96 values without tolerance 4 7 0 x100 = 47K Example 3 4-Band Marking E24 values 8 2 x1K 5% = 82K 5% E.g. MFR4 E96 E.g. WRM0204 E96 E.g. WMO3S E24 Further Technical Information Application Notes for current sense, circuit protection, pulse and overload ratings, energy metering, lighting, medical, automotive, high voltage design and more http://www.welwyn-tt.com/literature.asp Parametric Search for selection of products by parameters, package, technology and application http://www.welwyn-tt.com/products/resistors/resistors.asp Calculation Tools for pulse loading, temperature derating, critical resistance, capacitor bleed and more http://www.welwyn-tt.com/products/resistors/calculation-tools.asp Product Compliance Matrix for RoHS and REACH SVHC status, termination finish, obsolescence data, SnPb availability and more http://www.welwyn-tt.com/downloads/pbfree/rohs-compliance-matrix.pdf Tin Whisker Report test report on tin whisker qualification of Pb-free finishes http://www.welwyn-tt.com/downloads/pbfree/sn-whisker-report.pdf Fixed Resistors Common Formulae V2/P R V/I V.I Preferred Values I2.R P P/I2 V2/R P/I V/R V √(P.R) √(P/ R) I P/V I.R R is resistance value (ohms) P is power dissipated (watts) V is voltage dropped (volts) I is current flowing (amps) E.g. R = V / I Terms and Definitions Ambient Temperature Critical Resistance Isolation Voltage (Voltage Proof) LEV (Max Volts) Overload Power Rating Pulse (Surge) Series TCR Tolerance Type VCR The temperature which would be adopted by the body of the resistor under application conditions except with negligible power dissipation in the resistor. The resistance value at which application of the LEV causes dissipation of the full rated power. The maximum continuous voltage which may be applied between the resistor and a conductor in contact with its insulated body. The maximum continuous voltage which may be applied across a resistor whose ohmic value is greater than the critical resistance. Power dissipation which exceeds the power rating for durations exceeding 0.1s. The maximum continuous power that may be dissipated by a resistor whose ohmic value is less than the critical resistance and at a defined maximum ambient temperature. Power dissipation which exceeds the power rating for durations less than 0.1s. A set of components with the same basic design features and performance and usually a range of sizes and ratings. Temperature Coefficient of Resistance; the maximum magnitude of reversible ohmic value change per degree centigrade due to deviation in body temperature from a reference normally of 20°C. The maximum allowable magnitude of deviation from nominal ohmic value measured at delivery and at room temperature. An individual member of a series with specified size and rating. Voltage Coefficient of Resistance; the maximum reversible reduction in ohmic value per volt due to an increase in applied voltage. 1 1.01 1.02 1.04 1.05 1.06 1.07 1.09 1.1 1.11 1.13 1.14 1.15 1.17 1.18 1.2 1.21 1.23 1.24 1.26 1.27 1.29 1.3 1.32 1.33 1.35 1.37 1.38 1.4 1.42 1.43 1.45 1.47 1.49 1.5 1.52 1.54 1.56 1.58 1.6 1.62 1.64 1.65 1.67 1.69 1.72 1.74 1.76 1.78 1.8 1.82 1.84 1.87 1.89 1.91 1.93 1.96 1.98 2 2.03 2.05 2.08 2.1 2.13 2.15 2.18 2.21 2.23 2.26 2.29 2.32 2.34 2.37 2.4 2.43 2.46 2.49 2.52 2.55 2.58 2.61 2.64 2.67 2.71 2.74 2.77 2.8 2.84 2.87 2.91 2.94 2.98 3.01 3.05 3.09 3.12 E192 3.16 3.2 3.24 3.28 3.32 3.36 3.4 3.44 3.48 3.52 3.57 3.61 3.65 3.7 3.74 3.79 3.83 3.88 3.92 3.97 4.02 4.07 4.12 4.17 4.22 4.27 4.32 4.37 4.42 4.48 4.53 4.59 4.64 4.7 4.75 4.81 4.87 4.93 4.99 5.05 5.11 5.17 5.23 5.3 5.36 5.42 5.49 5.56 5.62 5.69 5.76 5.83 5.9 5.97 6.04 6.12 6.19 6.26 6.34 6.42 6.49 6.57 6.65 6.73 6.81 6.9 6.98 7.06 7.15 7.23 7.32 7.41 7.5 7.59 7.68 7.77 7.87 7.96 8.06 8.16 8.25 8.35 8.45 8.56 8.66 8.76 8.87 8.98 9.09 9.2 9.31 9.42 9.53 9.65 9.76 9.88 10 etc… E96 1 1.02 1.05 1.07 1.1 1.13 1.15 1.18 1.21 1.24 1.27 1.3 1.33 1.37 1.4 1.43 1.47 1.5 1.54 1.58 1.62 1.65 1.69 1.74 1.78 1.82 1.87 1.91 1.96 2 2.05 2.1 2.15 2.21 2.26 2.32 2.37 2.43 2.49 2.55 2.61 2.67 2.74 2.8 2.87 2.94 3.01 3.09 3.16 3.24 3.32 3.4 3.48 3.57 3.65 3.74 3.83 3.92 4.02 4.12 4.22 4.32 4.42 4.53 4.64 4.75 4.87 4.99 5.11 5.23 5.36 5.49 5.62 5.76 5.9 6.04 6.19 6.34 6.49 6.65 6.81 6.98 7.15 7.32 7.5 7.68 7.87 8.06 8.25 8.45 8.66 8.87 9.09 9.31 9.53 9.76 10 etc… E24 1 1.1 1.2 1.3 1.5 1.6 1.8 2 2.2 2.4 2.7 3 3.3 3.6 3.9 4.3 4.7 5.1 5.6 6.2 6.8 7.5 8.2 9.1 10 etc… E12 1 1.2 1.5 1.8 2.2 2.7 3.3 3.9 4.7 5.6 6.8 8.2 10 etc… E6 1 1.5 2.2 3.3 4.7 6.8 10 etc… 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 18 TT electronics companies www.bitechnologies.com www.irctt.com www.welwyn-tt.com Europe: sales@ttelectronicseurope.com Asia: sales@ttelectronicsasia.com Americas: sales@ttelectronics-na.com General Note Welwyn Components reserves the right to make changes in product specification without notice or liability. All information is subject to Welwyn’s own data and is considered accurate at time of going to print © Welwyn Components Limited Issue 5
