ERAL0URPOSE&AILSAFE
General Purpose Failsafe
DED7IREWOUND2ESISTOR
Molded Wirewound Resistor
'ENERAL0URPOSE&AILSAFE
·
-OLDED7IREWOUND2ESISTOR
·
3ERIES SPH/SPF Series
BLE
SPF is fusible
TOLERANCE ±5%, ±10% tolerance
OHMS 0.1 ohm to 2400 ohms
NDSOLDERABLELEADS
30(30&3ERIES
Weldable and solderable leads
s30&ISFUSIBLE
DWITHWATTDIMENSIONS
2 watt rated with 1 watt dimensions
s››TOLERANCE
PLACEMENTFOR"7("7&
Drop-in replacement for BWH/BWF
sOHMTOOHMS
2O(3COMPLIANTCONSTRUCTIONAVAILABLE
Lead free, RoHS compliant construction available
s7ELDABLEANDSOLDERABLELEADS
sWATTRATEDWITHWATTDIMENSIONS
OWAS›PPM #STANDARDCUSTOM4#SAVAILABLE
TCR’s as low as ±150 ppm/°C standard
s$ROPINREPLACEMENTFOR"7("7&
s,EADFREE2O(3COMPLIANTCONSTRUCTIONAVAILABLE
(custom TC’s available)
·
·
·
·
·
·
s4#2SASLOWAS›PPM #STANDARDCUSTOM4#SAVAILABLE
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4ELEPHONEs&ACSIMILEs7EBSITEWWWIRCTTCOM
© TT electronics plc
-ARKING
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General Note
'ENERAL.OTE
)2#RESERVESTHERIGHTTOMAKECHANGESINPRODUCTSPECIlCATIONWITHOUTNOTICEORLIABILITY
TT electronics reserves the right to make changes in product specification without notice or liability.
!LLINFORMATIONISSUBJECTTO)2#SOWNDATAANDISCONSIDEREDACCURATEATTIMEOFGOINGTOPRINT
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
7IREAND&ILM4ECHNOLOGIES$IVISION s3OUTH3TAPLES3TREETs#ORPUS#HRISTI4EXAS53!
COATINGAPPLIEDOVER THE RESISTIVE ELE
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TO PROVIDE FLAMMABILITY PROTECTION
IS DOUBLE WIDTH TO DESIGNATE WIREWOUND
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CONSTRUCTION!lFTHBANDBLUEINCOLORIS
USEDFORmAMEPROOFIDENTIlCATION
!SUBSIDIARYOF
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
44ELECTRONICSPLC
30(30&3ERIES)SSUE$ECEMBER3HEETOF
07.12
'ENERAL0URPOSE&AILSAFE
-OLDED7IREWOUND2ESISTOR
SPH/SPF Series
General Purpose Failsafe
Molded Wirewound Resistor
%NVIRONMENTAL$ATA
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4ELEPHONEs&ACSIMILEs7EBSITEWWWIRCTTCOM
30(30&3ERIES)SSUE$ECEMBER3HEETOF
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
07.12
General Purpose Failsafe
Molded
Wirewound Resistor
SPH/SPF Series
General Purpose Failsafe
Molded Wirewound Resistor
SPF Power Derating Curve
2.5
2.5
2.0
2.0
Power (watts)
Power (watts)
SPH Power Derating Curve
1.5
1.0
0.5
0
0
50 70
100
1.5
1.0
0.5
0
150 160 200
0
SPF Typical Fusing
150
200
150
0.1 ohm
1 ohm
15
10 ohm
10
100 ohm
1000 ohm
5
0
20
40
60
80
Temperature Rise (°C)
20
Power (watts)
100
SPH and SPF
Temperature Rise Chart
25
2
0
50 70
Ambient Temperature (°C)
Ambient Temperature (°C)
125
100
75
50
25
100
0
Time (seconds)
0
0.5
1.0
1.5
2.0
Power Input (watts)
Ordering Data
Sample Part No.
SPH
1500
J
IRC Type
LF
B4
Product
Resistance Range
Packaging
Code
Pitch:
Dimension
between
parts
Inside tape to
inside Tape
dimension
Leads
trimmed or
untrimmed
Quantity /
reel
B1
0.400”
+/- 0.015”
2.062”
+/- 0.062”
0.031” max
1250
B2
0.400”
+/- 0.015”
2.500”
+/- 0.062”
0.031” max
1250
B3
0.400”
+/- 0.015”
2.875”
+/- 0.062”
0.031” max
1250
B4 (Std)
0.375”
+/- 0.015”
2.875”
+/- 0.062”
Un-trimmed
1250
Tolerance
J = 5%, K = 10%
Lead Free Construction
SPH / SPF
Packaging (B4 Standard Default)
Wire and Film Technologies Division s3OUTH3TAPLES3TREETs#ORPUS#HRISTITEXAS53!
TELEPHONE:sFACSIMILE:sWEBSITE:WWWIRCTTCOM
30(30&3ERIES)SSUE$ECEMBER3HEETOF
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
07.12