Resistors
Commercial Styles
Commercial Styles Semi-Precision
Semi-Precision
Power Wirewound Resistors
Power Wirewound Resistors
T / NT Wirewound Series
•
0.1Ω to 300KΩ
T / NT Wirewound Series
•
0.75 to
to 300KΩ
0.1Ω
14 watts
•
±0.1% to ±10% tolerance
0.75 to 14 watts
•
Non-inductive windings available
High thermal
conductivity,
centerless ground
ceramic cores
for optimum heat
distribution and
dissipation
Weldable and
solderable leads
•
Meets or exceeds all applicable MIL-R-26 ratings
Electrical Data
IRC
Style
Tolerance down to 0.1%
Non-inductive windings available
Meets or exceeds all applicable MIL-R-26 ratings
Similar To
MIL-R-26
Style
Similar to
MIL-PRF-39007
Style
1
---
RWR81
1
Similar to
---
MIL-PRF-39007
Style
1
1
Silicone coat
All welded
construction
Wattage Rating
U
0.75
1.0
Wattage Rating
V
All Pb-free parts comply with EU Directive 2011/65/EU (RoHS2)
Working
Resistance Range (Ω)
Min
Ω
0.1
0.1
Max KΩ
4
4.5
12
12
Maximum
Voltage
54.8
67.1
Maximun
109.5
Working
Voltage
T-1/2
---
Electrical Data
T-1/2-A81
IRC
T-1A-70
Style
---
---
---
---
3.75
3.0
---
5.5
6.5
---
7.5
6.5
9.0
7.0
14.0
13.0
---
11.0
RW81
Similar to
RW70
MIL-R-26
Style
1.0
Resistance Range (Ω)
0.1
T-1-80
T-2A*
T-1/2
T-1/2-A81
RW80
RW81
RWR80
---
-
2.0
3.0
U
Min
Ω
0.1
0.1
0.1
.05
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
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
Max KΩ
4
154.9
54.8
67.1
---
-
0.75
1.0
RWR81
1
4.5
25
306.2
244.9
109.5
109.5
346.4
154.9
T-2A-69
T-1A-70
T-1C
T-2B-79
T-1-80
T-2A*
RW69
RW70
-
RW79
RW80
---
-
-
RWR89
1
RWR80
1
---
1.0
3.0
1
4.0
2.0
3.0
12
20
2K
40
12
25
T-3
---
-
---
-
38
457.2
306.2
T-5*
T-2A-69
T-2B-79
T-5-74
T-3
T-5*
---
RW69
RW79
RW74
-
---
-
RWR89
RWR74 / 84
1
1
5.0
3.0
3.0
5.0
4.0
20
45
40
94
38
45
540.8
244.9
346.4
685.5
457.2
T-6
---
-
---
-
-
6.0
5.0
65
698.2
540.8
T-6-67
T-5-74
T-7*
T-6
T-7A-55
T-7*
T-6-67
RW67
RW74
-
---
RW67
-
---
RWR74 / 84
1
-
---
-
---
5.0
6.0
7.0
6.5
94
92
65
115
92
115
773.3
685.5
698.2
1017.3
773.3
RW55
RW56
RW55
RW56
---
-
---
-
---
7.0
200
1183.2
1017.3
T-10A-56
T-7A-55
T-10A-56
T-10*
T-10*
---
-
-
---
-
---
7.0
14.0
10.0
10.0
10.0
300
200
300
300
300
300
2049.4
1183.2
2049.4
1974.8
1974.8
T-10-78
T-10-78
RW78
RW78
RWR78
1
RWR78
1
10.0
300
1732
1732
T-10-68
T-10-68
RW68
RW68
---
-
---
11.0
300
300
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The RWR is obsolete.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.
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
© TT Electronics plc
09.17
Commercial Styles Semi-Precision
Power Wirewound Resistors
Commercial Styles
Semi-Precision
T / NT Wirewound Series
Power Wirewound Resistors
Temperature Range
Standard Temperature Coefficient
Characteristic U = -55°C to +275°C
±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
Available from -30 ppm/°C to +6000 ppm/°C
Temperature range for special TC’s -50°C to +150°C
1000 megohms minimum dry at 100 volts DC
Wattage rating based on operation at 25°C
Derate to zero at 275°C & 350°C for "U" style rating
General Specifications
Special Temperature Coefficient
Insulation Resistance
Derating
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.
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
© TT Electronics plc
09.17
Commercial Styles
Commercial Styles
Semi-Precision
T / NT Wirewound Series
Semi-Precision
Power Wirewound Resistors
Power
Data
Wirewound Resistors
Physical
Commercial Styles Semi-Precision
Power Wirewound Resistors
Physical Data
A
Length
A
Length
B
Diameter
B
Diameter
C
Diameter
C
Diameter
1 ½” (38.1mm)
Minimum
Lead Length
1 ½” (38.1mm)
Minimum
Lead Length
Dimensions (Inches and (mm))
A
IRC / Shallcross
A
Style
Inches
IRC / Shallcross
Style
Inches
T-1/2
0.330 (±0.062)
T-1/2
T-1/2-A81
T-1/2-A81
T-1A-70
T-1A-70
T-1C
T-1-80
T-1-80
T-2A
T-2A
T-2A-69
T-2A-69
T-2B-79
T-2B-79
T-3
T-3
T-5
T-5
T-5-74
T-5-74
T-6
T-6
T-6-67
T-6-67
T-7
T-7
T-7A-55
T-7A-55
T-10A-56
T-10A-56
T-10
T-10
T-10-78
T-10-78
T-10-68
T-10-68
0.330 (±0.062)
0.250 (±0.032)
0.250
0.406 (±0.032)
0.406
0.303
(±0.032)
0.406 (±0.032)
0.500 (±0.062)
(±0.062)
0.500 (±0.063)
0.500 (±0.063)
0.560 (±0.062)
0.560
0.625 (±0.062)
0.625
0.875 (±0.062)
0.875 (±0.062)
0.875
1.000 (±0.062)
(±0.062)
1.000 (±0.094)
1.000 (±0.094)
1.185 (±0.062)
1.185 (±0.062)
1.375 (±0.094)
1.375
2.000 (±0.094)
2.000 (±0.094)
1.812 (±0.062)
1.812
1.780 (±0.062)
1.780 (±0.062)
1.875 (±0.063)
1.875 (±0.063)
B
Dimensions (Inches and (mm))
mm
mm
8.4 (±1.6)
8.4 (±1.6)
6.4 (±0.8)
6.4 (±0.8)
10.3(±0.8)
10.3
(±0.8)
7.7
(±0.8)
10.3 (±0.8)
12.7 (±1.6)
12.7 (±1.6)
12.7
14.2 (±1.6)
14.2
15.8 (±1.6)
15.8
22.2 (±1.6)
22.2 (±1.6)
22.2
25.4 (±1.6)
(±1.6)
25.4 (±2.4)
25.4 (±2.4)
30.0 (±1.6)
30.0 (±1.6)
35.0 (±2.4)
35.0
50.8 (±2.4)
50.8 (±2.4)
46.0 (±1.6)
46.0
45.2 (±1.6)
45.2
47.6 (±1.6)
47.6 (±1.6)
Inches
Inches
0.078 (±0.031)
0.078 (±0.031)
0.085 (±0.020)
0.085 (±0.020)
0.094 (±0.032)
0.094 (±0.032)
0.115 (±0.32)
0.094 (±0.032)
0.187 (±0.031)
0.187 (±0.031)
0.188 (±0.063)
0.188 (±0.063)
0.187 (±0.031)
0.187 (±0.031)
0.250 (±0.062)
0.250
0.312 (±0.062)
0.312 (±0.062)
0.312 (±0.062)
0.312 (±0.062)
0.313 (±0.063)
0.313 (±0.063)
0.312 (±0.062)
0.312 (±0.062)
0.469 (±0.094)
0.469 (±0.094)
0.469 (±0.094)
0.375 (±0.062)
0.375 (±0.062)
0.375 (±0.062)
0.344 (±0.094)
0.344 (±0.094)
B
mm
mm
2.0 (±0.8)
2.0 (±0.8)
2.2 (±0.5)
2.2 (±0.5)
2.4 (±0.8)
2.4 (±0.8)
2.9
2.4
4.8 (±0.8)
(±0.8)
4.8 (±1.6)
(±1.6)
4.8 (±0.8)
4.8 (±0.8)
6.3 (±1.6)
6.3
7.9 (±1.6)
7.9 (±1.6)
7.9
8.0 (±1.6)
8.0 (±1.6)
8.0 (±1.6)
8.0 (±2.4)
12 (±1.6)
12 (±2.4)
12 (±1.6)
9.5 (±2.4)
9.5 (±1.6)
9.5 (±1.6)
8.7 (±2.4)
8.7 (±2.4)
C
Inches C
mm (±0.05)
(±0.002)
Inches
mm (±0.05)
0.020
0.5
(±0.002)
0.020
0.020
0.5
0.5
0.020
0.020
0.032
0.032
0.032
0.032
0.040
0.040
0.040
0.040
0.040
0.032
0.032
0.040
0.040
0.032
0.032
0.032
0.040
0.040
0.040
0.032
0.032
0.5
0.5
0.8
0.8
0.8
0.8
1.0
1.0
1.0
1.0
1.0
0.8
0.8
1.0
1.0
0.8
0.8
0.8
1.0
1.0
1.0
0.8
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
T / NT Wirewound Series Issue January 2010 Sheet 3 of 4
T / NT Wirewound Series Issue January 2010 Sheet 3 of 4
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.
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
© TT Electronics plc
09.17
Commercial Styles Semi-Precision
Power Wirewound Resistors
Commercial Styles
Semi-Precision
T / NT Wirewound Series
Power Wirewound Resistors
T180
1000
F
LF
Ordering Data
Sample Part No.
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.
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
© TT Electronics plc
09.17
