Resistors
Semi-Precision Non-Inductive Power
Wirewound Resistors
NT Series
0.1Ω to 87.5kΩ
0.75 to 14 watts
Tolerance down to ±0.1%
Non-inductive windings
Meets or exceeds all applicable MIL-R-26 ratings
All Pb-free parts comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3)
Electrical Data
Type
NT-1/2
NT-1/2-A81
NT-1A-70
NT-1C
NT-1-80
NT-2A
NT-2A-69
NT-2B-79
NT-3
NT-5
NT-5-74
NT-6
NT-6-67
NT-7
NT-7A-55
NT-10A-56
NT-10
NT-10-78
NT-10-68
Similar to
MIL-R-26
Style
-
RW81
RW70
-
RW80
-
RW69
RW79
-
-
RW74
-
RW67
-
RW55
RW56
-
RW78
RW68
Similar to
MIL-
PRF-39007
Style
1
-
RWR81
1
-
-
RWR80
1
-
-
RWR89
1
-
-
RWR74 / 84
1
-
-
-
-
-
-
RWR78
1
-
Power Rating 25°C (W)
U
0.75
1
1
1
2
3
3
3
4
5
5
6
6.5
7
7
14
10
10
11
Value Min
1R0
1R0
0R1
0R1
1R7
0R1
0R1
0R5
0R3
0R8
0R8
1R1
1R1
0R1
0R1
0R17
3R0
3R0
0R1
Value Max
3K0
500R
3K8
2K1
6K0
10K
12K5
12K
15K
30K
30K
46K
46K
57K5
87K5
75K
51K
51K
75K
Maximum
Working
Voltage (V)
55
67
110
110
155
306
245
346
457
541
686
698
773
1017
1183
2049
1975
1732
1817
Note
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: The RWR is obsolete.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
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
06.20
Commercial Styles
Non-Inductive
Commercial Styles
Semi-Precision
Semi-Precision
Power
Power Wirewound Resistors
Wirewound Resistors
Semi-Precision
NT Series
Power Wirewound Resistors
Temperature Range
Standard Temperature
Coeffi
cient
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 0.499Ω
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 for "U" style rating
T / NT Wirewound Series
General Specifications
Special Temperature
Coeffi
cient
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 • Co Ch Texas 78411 USA
rpus risti
Telephone
: 361 992 7900 •
Facsimile361 992 3377 Website ww .irctt.com
:
•
: w
T / NT Wirewound Se Issue January 2010 Sheet 2 of 4
ries
General Note
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.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
BI Technologies IRC Welwyn
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
www.ttelectronics.com/resistors
© TT Electronics plc
© TT Electronics plc
06.20
09.17
Semi-Precision
Power Wirewound Resistors
Power
Data
Wirewound Resistors
Physical
NT Series
T / NT Wirewound Series
Commercial Styles
Commercial Styles
Non-Inductive
Semi-Precision
Semi-Precision
Power
Power Wirewound Resistors
Commercial Styles
Wirewound Resistors
Semi-Precision
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
Type
A
Inches
IRC / Shallcross
Style
Inches
NT-1/2
0.330 (±0.062)
T-1/2
NT-1/2-A81
T-1/2-A81
NT-1A-70
T-1A-70
NT-1C
T-1-80
NT-1-80
T-2A
NT-2A
T-2A-69
NT-2A-69
T-2B-79
NT-2B-79
T-3
NT-3
T-5
NT-5
T-5-74
NT-5-74
T-6
NT-6
T-6-67
NT-6-67
T-7
NT-7
T-7A-55
NT-7A-55
T-10A-56
NT-10A-56
T-10
NT-10
T-10-78
NT-10-78
T-10-68
NT-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 • Co Ch Texas 78411 USA
rpus risti
Telephone
: 361 992 7900 •
Facsimile361 992 3377 Website ww .irctt.com
:
•
: w
T / NT Wirewound Se Issue January 2010 Sheet 3 of 4
ries
T / NT Wirewound Se Issue January 2010 Sheet 3 of 4
ries
Wire and Film Technologies Division
• 4222 South Staples Street • Co Ch Texas 78411 USA
rpus risti
Telephone
: 361 992 7900 •
Facsimile361 992 3377 Website ww .irctt.com
:
•
: w
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
06.20
09.17
Semi-Precision Non-Inductive Power
Wirewound Resistors
NT Series
Ordering Procedure
Example: NT1801000FLF
(NT-1-80, 100 ohms ±1%, Pb-free)
N
T
1
8
1
1
Type
1
2
Value
0
1
0
2
3
Tolerance
0
0
F
3
L
4
4
Termination
F
5
5
Packing
2
3 digits + multiplier B = ±0.1% Omit for SnPb Omit for standard (73mm) tape & reel
NT1/2, NT1/2A81,
C = ±0.25% LF = Pb-free BLK
All sizes
Bulk
R = ohms for
NT1A70, NT1C, NT180,
NT2A, NT2A69, NT2B79, values <100ohms D = ±0.5%
Non-standard
NT-2A, NT2-A-69,
NT3, NT5, NT574, NT6,
F = ±1%
TBD
(63.5mm)
NT-2B-79, NT-3
tape & reel
NT667, NT7, NT7A55,
J = ±5%
NT10A56, NT10, NT1078,
Non-standard
NT-2A, NT-2A-69,
NT1068
TBC
(52.4mm)
NT-2B-79
tape & reel
Tape & reel pack quantities
NT-1/2 to NT-5-74
1000/reel
NT-6 to NT-10-68
500/reel
Note 1: Legacy part numbers which include a power characteristic code U after Type are permitted.
Note 2: For full details see PS002 - Packing Specification Axial Resistors (IRC Origin):
https://www.ttelectronics.com/TTElectronics/media/ProductFiles/Resistors/ApplicationNotes/PS002-Packing-of-Axial-Resistors-IRC-Origin.pdf
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
06.20
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