www.vishay.com
125
RS, NS
Vishay Dale
Document Number 30204
Revision 22-Mar-06
For technical questions, contact ww2bresistors@vishay.com
DIMENSIONS
Wirewound Resistors, Military, MIL-PRF-26 Qualified,
Type RW, Precision Power, Silicone Coated
GLOBAL DIMENSIONS in inches [millimeters]
MODEL
MATERIAL SPECIFICATIONS
Element: Copper-nickel alloy or nickel-chrome alloy, depending on
resistance value
Core: Ceramic, steatite or alumina, depending on physical size
Coating: Special high temperature silicone
Standard Terminals: 100 % Sn, or 60/40 Sn/Pb coated Copperweld®.
NOTE: Military "RW" parts are only available with 60/40 Sn/Pb finish.
End Caps: Stainless steel
Deviations for RS-1/8: Thermoset silicone molded construction,
endcaps will be nickel-silver alloy and terminals will be tinned copper
Part Marking: DALE, Model, Wattage*, Value, Tolerance, Date Code
C
D
A1.50
[38.10]*
Min.
B
AB C
D
(Max.)**
RS1/8 0.155 ± 0.015 — 0.065 ± 0.015 0.020 ± 0.002
[3.94 ± 0.381] [1.65 ± 0.381] [0.508 ± 0.051]
RS1/4 0.250 ± 0.031 0.281 0.085 ± 0.020 0.020 ± 0.002
[6.35 ± 0.787] [7.14] [2.16 ± 0.508] [0.508 ± 0.051]
RS1/2 0.312 ± 0.016 0.328 0.078 + 0.016 - 0.031 0.020 ± 0.002
[7.92 ± 0.406] [8.33] [1.98 + 0.406 - 0.787] [0.508 ± 0.051]
RS01A 0.406 ± 0.031 0.437 0.094 ± 0.031 0.020 ± 0.002
RS01A...300
[10.31 ± 0.787] [11.10] [2.39 ± 0.787] [0.508 ± 0.051]
RS01M 0.285 ± 0.025 0.311 0.110 ± 0.015 0.020 ± 0.002
[7.24 ± 0.635] [7.90] [2.79 ± 0.381] [0.508 ± 0.051]
RS002 0.625 ± 0.062 0.765 0.250 ± 0.031 0.040 ± 0.002
[15.88 ± 1.57] [19.43] [6.35 ± 0.787] [1.02 ± 0.051]
RS02M 0.500 ± 0.062 0.562 0.185 ± 0.015 0.032 ± 0.002
[12.70 ± 1.57] [14.27] [4.70 ± 0.381] [0.813 ± 0.051]
RS02B 0.560 ± 0.062 0.622 0.187 ± 0.031 0.032 ± 0.002
RS02B...300
[14.22 ± 1.57] [15.80] [4.75 ± 0.787] [0.813 ± 0.051]
RS02C 0.500 ± 0.062 0.593 0.218 ± 0.031 0.040 ± 0.002
[12.70 ± 1.57] [15.06] [5.54 ± 0.787] [1.02 ± 0.051]
RS02C...17 0.500 ± 0.062 0.593 0.218 ± 0.031 0.032 ± 0.002
RS02C...23 [12.70 ± 1.57] [15.06] [5.54 ± 0.787] [0.813 ± 0.051]
0.875 ± 0.062 1.0 0.312 ± 0.031 0.040 ± 0.002
[22.23 ± 1.57] [25.4] [7.92 ± 0.787] [1.02 ± 0.051]
RS007 1.22 ± 0.062 1.28 0.312 ± 0.031 0.040 ± 0.002
[30.99 ± 1.57] [32.51] [7.92 ± 7.87] [1.02 ± 0.051]
RS010 1.78 ± 0.062 1.87 0.375 ± 0.031 0.040 ± 0.002
RS010...39 [45.21 ± 1.57] [47.50] [9.53 ± 0.787] [1.02 ± 0.051]
RS010...38 1.78 ± 0.062 1.84 0.375 ± 0.031 0.040 ± 0.002
[45.21 ± 1.57] [46.74] [9.53 ± 0.787] [1.02 ± 0.051]
*On some standard reel pack methods, the leads may be trimmed to
a shorter length than shown.
NOTE: RS-1/8 terminal length will be 1.0" [25.4 mm] minimum.
**B (Max.) dimension is clean lead to clean lead.
NS NON-INDUCTIVE
Models of equivalent physical and electrical specifications are available
with non-inductive (Aryton-Perry) winding. They are identified by
substituting the letter N for R in the model number (NS-5, for example).
*Wattage marked on part will be "U" characteristic
-65 -50 0 50 150 250 350
AMBIENT TEMPERATURE IN °C
Derating
120
100
80
60
40
20
0
RATED POWER IN %
CHAR. V
CHAR. U
25
RS005
RS005...69
RS005...70
*All ∆R figures shown are maximum, based upon testing requirements per MIL-PRF-26.
PERFORMANCE*
TEST CONDITIONS OF TEST TEST LIMITS
Characteristic U Characteristic V
Thermal Shock Rated power applied until thermally stable, then a min. of 15 minutes at - 55 °C± (0.2 % + 0.05
Ω
)
∆
R
± (2.0 % + 0.05 Ω) ∆
R
Short Time Overload
5 x rated power (3.75 watt and smaller), 10 x rated power (4 watt and larger) for 5 seconds
± (0.2 % + 0.05
Ω
)
∆
R
± (2.0 % + 0.05 Ω) ∆
R
Dielectric Withstanding Voltage 500 minimum for RS-1/8 thru RS-1A, 1000 for all others, duration of 1 minute ± (0.1 % + 0.05
Ω
)
∆
R
± (0.1 % + 0.05 Ω) ∆
R
Low Temperature Storage - 65 °C for 24 hours ± (0.2 % + 0.05
Ω
)
∆
R
± (2.0 % + 0.05 Ω) ∆
R
High Temperature Exposure 250 hours at: U = + 250 °C, V = + 350 °C± (0.5 % + 0.05
Ω
)
∆
R
± (2.0 % + 0.05
Ω
)
∆
R
Moisture Resistance MIL-STD-202 Method 106, 7b not applicable ± (0.2 % + 0.05
Ω
)
∆
R
± (2.0 % + 0.05
Ω
)
∆
R
Shock, Specified Pulse MIL-STD-202 Method 213, 100 g's for 6 milliseconds, 10 shocks ± (0.1 % + 0.05
Ω
)
∆
R
± (0.2 % + 0.05
Ω
)
∆
R
Vibration, High Frequency Frequency varied 10 to 2000 Hz, 20 g peak, 2 directions 6 hours each ± (0.1 % + 0.05
Ω
)
∆
R
± (0.2 % + 0.05
Ω
)
∆
R
Load Life 2000 hours at rated power, + 25 °C, 1.5 hours “ON”, 0.5 hours “OFF” ± (0.5 % + 0.05
Ω
)
∆
R
± (3.0 % + 0.05
Ω
)
∆
R
5 to 10 sec., 5 or 10 lb pull test (depending on size),
torsion test - 3 alternating directions, 360° each
Terminal Strength ± (0.1 % + 0.05
Ω
)
∆
R
± (1.0 % + 0.05
Ω
)
∆
R
PARAMETER UNIT RS RESISTOR CHARACTERISTICS
Temperature Coefficient ppm/°C± 90 for below 1 Ω, ± 50 for 1 Ω to 9.9 Ω, ± 20 for 10 Ω and above
Dielectric Withstanding Voltage VAC 500 minimum for RS-1/8 thru RS-1A, 1000 minimum for all others
Maximum Working Voltage V (P x R)1/2
Insulation Resistance Ω1000 Megohm minimum dry, 100 Megohm minimum after moisture test
Terminal Strength lb 5 minimum for RS-1/8 thru RS-1A, 10 minimum for all others
Solderability – MIL-PRF-26 type - Meets requirements of ANSI J-STD-002
Operating Temperature Range °C Characterisitic U = - 65/+ 250, Characteristic V = - 65/+ 350
TECHNICAL SPECIFICATIONS
Two conditions apply:
1. For NS models, divide maximum resistance values by two
2. Body O.D. on NS-2C may exceed that of the RS-2C by 010"