Resistors
Commercial Styles
Commercial
Styles Semi-Precision
Semi-Precision
Power
PowerWirewound
WirewoundResistors
Resistors
Make Possible
High thermal
conductivity,
centerless ground
ceramic cores
for optimum heat
distribution and
dissipation
T / NT Wirewound Series
T / NT Wirewound Series
• 0.1Ω to 300KΩ
• 0.75
to to
14 300KΩ
watts
0.1Ω
• ±0.1% to ±10% tolerance
0.75 to 14 watts
±0.1% to ±10% tolerance
• Meets or exceeds all applicable MIL-R-26 ratings
Non-inductive windings available
Meets or exceeds all applicable MIL-R-26 ratings
Weldable and
solderable leads
Silicone coat
• Non-inductive windings available
All welded
construction
Electrical Data
IRC
Style
Similar To
MIL-R-26
Style
Similar to
MIL-PRF-39007
Style 1
IRC
T-1A-70
Style
T-1-80
T-1/2
T-2A*
T-1/2-A81
Min Ω
Max KΩ
Voltage
---
0.75
---
0.1
4
54.8
RW81
RWR81 1
1.0
---
0.1
4.5
67.1
Similar to
RW70
MIL-R-26
Style
Similar to
--MIL-PRF-39007
Style1
Wattage Rating
12
Maximun
109.5
Working
Voltage
-
-
0.75
RW80
RWR80 1
---
---
RW81
RWR81
RW69
RW70
---
T-1C
T-2B-79
RW79
RWR89
RW80
RWR80
T-1-80
T-2A*
---
T-5*
T-2A-69
--RW69
T-2B-79
T-5-74
RW79
RW74
T-6
T-3
T-5*
T-6-67
T-5-74
T-7* T-6
T-6-67
2.0
U
1
--3.75
---1.0
3.0
---
3.0 1
2.0
1
---
3.0
1.0
1
---
4.0
5.5
---
5.03.0
6.5
5.03.0
---
-
1
RWR89
RWR74
/ 84
-
1.0
-
---
---
RW67
RW74
3.0
1
4.0
6.0
7.5
--- / 84 1
RWR74
---5.0
6.5
---
---
7.06.0
9.0
RW67
-
-
-
5.0
6.5
T-7A-55
RW55
---
---
7.0
T-10A-56
T-7A-55
RW56
RW55
---
---7.0
14.0
T-10A-56
T-10*
RW56
---
---
14.0
10.0
13.0
-
-
T-7*
T-10*
-
-
T-10-78
RW78
RW78
RWR78 11
T-10-68
T-10-68
RW68
RW68
---
T-10-78
Maximum
V
T-2A-69
T-1A-70
T-3
Resistance Range (Ω)
All Pb-free parts comply with EU Directive 2011/65/EU
(RoHS2)
Working
U
T-1/2
Electrical
Data--T-1/2-A81
Wattage Rating
RWR78
7.0
10.0
10.0
10.0
---11.0
--11.0
Resistance Range (Ω)
0.1
Min Ω
0.1
0.1
12
4
154.9
54.8
25
306.2
0.1
0.1
1220
244.9
109.5
.05
0.1
2K40
109.5
346.4
0.1
0.1
0.1
Max KΩ
12
67.1
154.9
38
457.2
0.1
0.1
2045
540.8
244.9
0.1
0.1
4094
346.4
685.5
0.1
0.1
0.1
0.1
4.5
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
25
38
306.2
457.2
65
698.2
9492
773.3
685.5
65115
698.2
1017.3
45
92
540.8
773.3
200
1183.2
300
200
2049.4
1183.2
115
1017.3
300
300
2049.4
1974.8
300
1974.8
300
1732
300
300
300
1732
1816.6
1816.6
* Available as radial lead = type TR.
Designate non-inductive winding by adding the prefix "N" to style.
1
The RWR is obsolete. The listed parts correspond to the commercial equivalent parts that are manufactured with the same procedures but lack
the burn-in screening that is required by MIL-PRF-39007
General Note
IRC reserves the right to make changes in product specification without notice or liability.
All information is subject to IRC’s own data and is considered accurate at time of going to print.
Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
A subsidiary of
TT electronics plc
T / NT Wirewound Series Issue January 2010 Sheet 1 of 4
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.ttelectronicsresistors.com
© TT Electronics plc
04.15
Commercial Styles
Semi-Precision
T / NT Wirewound Series
Power Wirewound Resistors
Commercial Styles Semi-Precision
Power Wirewound Resistors
Make Possible
General Specifications
Temperature Range
Characteristic U = -55°C to +275°C
Standard Temperature Coefficient
±20 ppm/°C 10Ω up
±50 ppm/°C 1.0Ω to 9.9Ω
±400 ppm/°C 0.50Ω to 0.999Ω
±650 ppm/°C 0.1Ω to 0.490Ω
Special Temperature Coefficient
Available from -30 ppm/°C to +6000 ppm/°C
Temperature range for special TC’s -50°C to +150°C
Insulation Resistance
1000 megohms minimum dry at 100 volts DC
Derating
Wattage rating based on operation at 25°C
Derate to zero at 275°C & 350°C for "U" style rating
Lead Material:
Tinned copperweld is standard.
Also available: Weldable Grade A nickel (bare)
Special Features:
- Radial lead available
- Resistance network packages designed to individual customer requirements
- Temperature coefficient matching and tracking to ±5 ppm
- Ratio tolerance matched sets available
Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
T / NT Wirewound Series Issue January 2010 Sheet 2 of 4
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.ttelectronicsresistors.com
© TT Electronics plc
04.15
Commercial Styles
Semi-Precision
TCommercial
/ NT Wirewound Series
Styles
Power Wirewound Resistors
Semi-Precision
Commercial Styles Semi-Precision
Power Wirewound Resistors
Make Possible
Physical Data
Power Wirewound Resistors
Physical Data
A
Length
A
Length
B
Diameter
C
Diameter
B
Diameter
1 ½” (38.1mm)
Minimum
C
Diameter
Lead Length
1 ½” (38.1mm)
Dimensions (Inches
and (mm))
Minimum
IRC / Shallcross
Style
Lead Length
A
Inches
T-1/2
IRC
/ Shallcross 0.330 (±0.062)
Style
Inches
T-1/2-A81
0.250
(±0.032)
B
mm
Inches
Dimensions
(Inches
and (mm))
A
B
C
mm
2.0 (±0.8)
Inches
(±0.002)
8.4 (±1.6)
0.078 (±0.031)
6.4mm
(±0.8)
Inches
0.085
(±0.020)
2.2mm
(±0.5)
0.020
Inches
0.020
(±0.002)
mm (±0.05)
C
0.5
mm 0.5
(±0.05)
T-1A-70
T-1/2
0.406 (±0.062)
(±0.032)
0.330
10.3
(±0.8)
8.4 (±1.6)
0.094 (±0.031)
(±0.032)
0.078
2.4 (±0.8)
2.0
0.020
0.5
T-1-80
T-1/2-A81
T-1C
T-2A
T-1A-70
0.406 (±0.032)
0.250
0.303 (±0.032)
0.500 (±0.032)
(±0.062)
0.406
10.3
(±0.8)
6.4 (±0.8)
7.7 (±0.8)
12.7 (±0.8)
(±1.6)
10.3
0.094 (±0.020)
(±0.032)
0.085
0.115 (±0.32)
0.187 (±0.032)
(±0.031)
0.094
2.4 (±0.5)
(±0.8)
2.2
2.9 (±0.8)
4.8 (±0.8)
2.4
0.025
0.020
0.6
0.5
0.032
0.020
0.8
0.5
T-2A-69
T-1-80
0.500 (±0.032)
(±0.063)
0.406
12.7 (±0.8)
(±1.6)
10.3
0.188 (±0.032)
(±0.063)
0.094
4.8 (±0.8)
(±1.6)
2.4
0.032
0.020
0.8
0.5
T-2B-79
T-2A
0.560 (±0.062)
0.500
14.2 (±1.6)
12.7
0.187 (±0.031)
4.8 (±0.8)
0.032
0.8
T-3
T-2A-69
0.625 (±0.063)
(±0.062)
0.500
15.8 (±1.6)
12.7
0.250 (±0.063)
(±0.062)
0.188
6.3 (±1.6)
4.8
0.040
0.032
1.0
0.8
T-5
T-2B-79
0.875 (±0.062)
0.560
22.2 (±1.6)
14.2
0.312 (±0.031)
(±0.062)
0.187
7.9 (±0.8)
(±1.6)
4.8
0.040
0.032
1.0
0.8
T-5-74
T-3
0.875 (±0.062)
0.625
22.2 (±1.6)
15.8
0.312 (±0.062)
0.250
7.9 (±1.6)
6.3
0.040
1.0
T-6
T-5
1.000 (±0.062)
0.875
25.4 (±1.6)
22.2
0.312 (±0.062)
8.0 (±1.6)
7.9
0.040
1.0
T-6-67
T-5-74
1.000 (±0.062)
(±0.094)
0.875
25.4 (±1.6)
(±2.4)
22.2
0.313 (±0.062)
(±0.063)
0.312
8.0 (±1.6)
7.9
0.032
0.040
0.8
1.0
T-7
T-6
1.185 (±0.062)
1.000
30.0 (±1.6)
25.4
0.312 (±0.062)
8.0 (±1.6)
0.040
1.0
T-7A-55
T-6-67
1.375 (±0.094)
1.000
35.0 (±2.4)
25.4
0.469 (±0.063)
(±0.094)
0.313
12 (±2.4)
8.0
(±1.6)
0.032
0.8
T-10A-56
T-7
2.000 (±0.062)
(±0.094)
1.185
50.8 (±1.6)
(±2.4)
30.0
0.469 (±0.062)
(±0.094)
0.312
12 (±2.4)
8.0
(±1.6)
0.032
0.040
0.8
1.0
T-10
T-7A-55
1.812 (±0.094)
(±0.062)
1.375
46.0 (±2.4)
(±1.6)
35.0
0.375 (±0.094)
(±0.062)
0.469
9.5
(±1.6)
12 (±2.4)
0.040
0.032
1.0
0.8
T-10-78
T-10A-56
1.780 (±0.094)
(±0.062)
2.000
45.2 (±2.4)
(±1.6)
50.8
0.375 (±0.094)
(±0.062)
0.469
9.5
(±1.6)
12 (±2.4)
0.040
0.032
1.0
0.8
T-10-68
T-10
1.875 (±0.062)
(±0.063)
1.812
47.6 (±1.6)
46.0
0.344 (±0.062)
(±0.094)
0.375
8.7 (±1.6)
(±2.4)
9.5
0.032
0.040
0.8
1.0
T-10-78
1.780 (±0.062)
45.2 (±1.6)
0.375 (±0.062)
9.5 (±1.6)
0.040
1.0
T-10-68
1.875 (±0.063)
47.6 (±1.6)
0.344 (±0.094)
8.7 (±2.4)
0.032
0.8
Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
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.
T / NT Wirewound Series Issue January 2010 Sheet 3 of 4
T / NT Wirewound Series Issue January 2010 Sheet 3 of 4
www.ttelectronicsresistors.com
© TT Electronics plc
04.15
Commercial Styles
Semi-Precision
T / NT Wirewound Series
Power Wirewound Resistors
Commercial Styles Semi-Precision
Power Wirewound Resistors
Make Possible
Ordering Data
Sample Part No.
T180
1000
F
LF
Style
Non-inductive version = NT
Resistance Value
Expressed in ohms (Standard EIA/MIL values)
Tolerance
F = ±1%, D = ±0.5%, B = ±0.1%
RoHS Compliant
Omit this code for SnPb finish
Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
T / NT Wirewound Series Issue January 2010 Sheet 4 of 4
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.ttelectronicsresistors.com
© TT Electronics plc
04.15