Semi-Precision Non-Inductive
Power Wirewound Resistors
NAS Series
Features
ꢀ 0.25ꢀtoꢀ10ꢀwaꢁs
Tolerance down to ±0.5%
ꢀ 0.1ꢀohmꢀtoꢀ51Kꢀohms
ꢀ ResistanceꢀwireꢀTCRꢀ±20ꢀppm/°C
ꢀ Non-inducꢂveꢀwindings
ꢀ Pb-freeꢀopꢂonꢀisꢀRoHSꢀcompliant
AllꢀPb-freeꢀpartsꢀcomplyꢀwithꢀEUꢀDirecꢂveꢀ2011/65/EUꢀamendedꢀbyꢀ(EU)ꢀ2015/863ꢀ(RoHS3)
Electrical Data
Equivalent
MIL-R-26
Power Rating
(watts)
Available Tolerance (ꢀ)
Value Min.
Value Max
Type
Style
<1R0
≥1R0
125°C
25°C
1
NAS-1/4
NAS-1/2
NAS-1
1R0
1R0
0R1
10R
0R5
0R5
0R2
0R5
0R8
1R0
0R3
500R
3K0
3K8
1K0
10K
12K
7K5
15K
30K
45K
51K
RW81
0.25
0.5
1
1
2
RW70U
RW79U
NAS-1C
2
1
3
2
NAS-2
3, 5
0.5, 1, 3, 5
4
3
NAS-2B
NAS-2C
3
2
5
3
NAS-3
NAS-5
NAS-7
NAS-10
7
RW74U
RW78U
5
9
7
14
10
Physical Data
Dimensions Inches (mm)
Type
A ±0.032 (0.81)
B (max)
C (max)
D (nom)
E (min)
NAS-1/4
NAS-1/2
0.250(6.4)
0.094 (2.4) 0.312 (7.9) 0.020 (0.5)
0.094 (2.4) 0.375 (9.5) 0.020 (0.5)
0.125 (3.2) 0.429 (10.9) 0.020 (0.5)
0.115 (2.9) 0.303 (7.7) 0.025 (0.64)
0.250 (6.3) 0.600 (15.2) 0.032 (0.8)
0.219 (5.6) 0.663 (16.6) 0.032 (0.8)
0.157 (4.0) 0.594 (15.1) 0.032 (0.8)
0.282 (7.2) 0.812 (20.6) 0.040 (1.0)
0.344 (8.8) 0.980 (24.9) 0.040 (1.0)
0.344 (8.8) 1.375 (35.0) 0.040 (1.0)
0.385 (9.8) 1.937 (49.2) 0.040 (1.0)
1.50 (38.1)
1.50 (38.1)
1.50 (38.1)
1.50 (38.1)
1.50 (38.1)
1.30 (33.0)
1.30 (33.0)
1.50 (38.1)
1.50 (38.1)
1.50 (38.1)
1.50 (38.1)
0.312(7.9)
NAS-1
0.367(9.3)
NAS-1C
0.256(6.5)
E
A
C
NAS-2
0.480(12.2)
D
B
NAS-2B
0.540(13.7)
NAS-2C
0.489(11.0)
NAS-3
0.687(17.5)
NAS-5
0.875(22.2)
NAS-7
1.250(31.8)
NAS-10
1.812(46.0)
ThermalꢀDataꢀ
Operating Temperature: -55°C to +250°C
Derating: see Power Derating graph
General Note
BIꢀTechnologiesꢀꢀꢀꢀIRCꢀꢀꢀꢀWelwyn
TTꢀElectronicsꢀreservesꢀtheꢀrightꢀtoꢀmakeꢀchangesꢀinꢀproductꢀspecificaꢂonꢀwithoutꢀnoꢂceꢀorꢀliability.
AllꢀinformaꢂonꢀisꢀsubjectꢀtoꢀTTꢀElectronics’ꢀownꢀdataꢀandꢀisꢀconsideredꢀaccurateꢀatꢀꢂmeꢀofꢀgoingꢀtoꢀprint.
www.ꢁelectronics.com/resistors
©ꢀTTꢀElectronicsꢀplc
10.23