RS, NS
Vishay Dale
Wirewound Resistors, Military, MIL-PRF-26 Qualified,
Type RW, Precision Power, Silicone Coated
FEATURES
•
•
•
•
High temperature coating
Complete welded construction
Meets applicable requirements of MIL-PRF-26
Available in non-inductive styles (type NS) with
Aryton-Perry winding for lowest reactive components
• Excellent stability in operation
STANDARD ELECTRICAL SPECIFICATIONS
MODEL
MIL-PRF-26
POWER RATING***
P
25
°
C
W
U
V
±
0.05% thru
±
3% thru
±
5%
±
10%
RESISTANCE RANGE
MIL. RANGE SHOWN IN BOLD FACE
Ω
WEIGHT
(Typical)
g
.125
—
—
—
—
0.1 - 950
0.15
.4
—
1 - 1k
0.499 - 1k
0.499 - 3.4k
0.1 - 3.4k
0.21
.75
—
1 - 1.3k
0.499 - 1.3k
0.499 - 4.9k
0.1 - 4.9k
0.23
1.0
—
1 - 2.74k
0.499 - 2.74k 0.499 - 10.4k
0.1 - 10.4k
0.34
1.0
—
0.499 - 2.74k 0.499 - 10.4k
0.1 - 10.4k
—
0.34
RW70**
1.0
—
0.1 - 2.74k
RS-1M
—
1.0
—
1 - 1.32k
0.499 - 1.67k 0.499 - 6.85k
0.1 - 6.85k
0.30
RS-2
—
4.0
5.5
0.499 - 12.7k
0.499 - 12.7k
0.1 - 47.1k
0.1 - 47.1k
2.10
RS-2M
—
3.0
—
0.499 - 4.49k
0.499 - 4.49k
0.1 - 18.74k
0.1 - 18.74k
0.65
RS-2B
—
3.0
3.75
0.499 - 6.5k
0.499 - 6.5k
0.1 - 24.5k
0.1 - 24.5k
0.70
RS-2B-300
3.0
—
0.499 - 6.5k
0.1 - 24.5k
0.1 - 24.5k
—
0.70
RW79**
3.0
—
0.1 - 6.49k
RS-2C
—
2.5
3.25
0.499 - 8.6k
0.499 - 8.6k
0.1 - 32.3k
0.1 - 32.3k
1.6
RS-2C-17
—
2.5
3.25
0.499 - 6.8k
0.499 - 8.6k
0.1 - 32.3k
0.1 - 32.3k
1.6
RS-2C-23
—
3.25
0.1 - 32.3k
—
—
—
1.6
RW69*
—
3.0
0.1 - 2.0k
RS-5
—
5.0
6.5
0.499 - 25.7k
0.499 - 25.7k
0.1 - 95.2k
0.1 - 95.2k
4.2
RS-5-69
5.0
—
—
0.499 - 25.7k
0.1 - 95.2k
0.1 - 95.2k
4.2
RW74**
5.0
—
0.1 - 24.3k
RS-5-70
—
6.5
0.1 - 95.2k
—
—
—
4.2
RW67*
—
6.5
0.1 - 8.2k
RS-7
—
7.0
9.0
0.499 - 41.4k
0.499 - 41.4k
0.1 - 154k
0.1 - 154k
4.7
RS-10
—
10.0
13.0
0.499 - 73.4k
0.499 - 73.4k
0.1 - 273k
0.1 - 273k
9.0
RS-10-38
10.0
—
0.499 - 73.4k
0.1 - 273k
0.1 - 273k
—
9.0
RW78**
10.0
–
0.1 - 71.5k
RS-10-39
—
13.0
0.1 - 273k
—
—
—
9.0
RW68*
—
11.0
0.1 - 20k
* Standard tolerance for these Mil parts is
±
5% 1Ω and above,
±
10% below 1Ω.
**Standard tolerance for these Mil parts is
±
0.5% &
±
1% for resistance values 0.1Ω and above,
±
0.1% for resistance values 0.499Ω and above.
***Vishay Dale RS models have two power ratings depending on operation temperature and stability requirements.
NOTE:
Shaded area indicates most popular models.
RS-1/8
RS-1/4
RS-1/2
RS-1A
RS-1A-300
—
—
—
—
TYPE
±
0.05%
±
0.1%
±
0.25%
±
0.5%,
±
1%
±
3%,
±
5%
±
10%
TECHNICAL SPECIFICATIONS
PARAMETER
UNIT
Temperature Coefficient
ppm/°C
Dielectric Withstanding Voltage V
AC
Short Time Overload
–
Maximum Working Voltage
Insulation Resistance
Terminal Strength
Solderability
Operating Temperature Range
Power Rating
V
Ω
lb
–
°C
–
RS RESISTOR CHARACTERISTICS
±
90 for below 1Ω,
±
50 for 1Ω to 9.9Ω,
±
20 for 10Ω and above
500 minimum for RS-1/8 thru RS-1A, 1000 minimum for all others
5 x rated power for 5 seconds for 3.75 watt size and smaller,
10 x rated power for 5 seconds for 4 watt size and greater
(P x R)
1/2
1000 Megohm minimum dry, 100 Megohm minimum after moisture test
5 minimum for RS-1/8 thru RS-1A, 10 minimum for all others
MIL-PRF-26 type - Meets requirements of ANSI J-STD-002
Non Mil type - Terminals are 60/40 electro tin plated to facilitate soldering
Characterisitic U = - 65/+ 250, Characteristic V = - 65/+ 350
Characteristic U - + 250°C max. hot spot temperature,
±
0.5% max.
∆R
in 2000 hr. load life
Characteristic V - + 350°C max. hot spot temperature,
±
3.0% max.
∆R
in 2000 hr. load life
10
Ω
RESISTANCE
Ω
For technical questions, contact ww2bresistors@vishay.com
ORDERING INFORMATION
RS-1A
MODEL
1.0%
TOLERANCE
±
%
Document Number 30204
Revision 10-Jun-02
www.vishay.com
116
RS, NS
Wirewound Resistors, Military, MIL-PRF-26 Qualified,
Type RW, Precision Power, Silicone Coated
DIMENSIONS
A
1.50
[38.10]*
Min.
Vishay Dale
MODEL
DIMENSIONS
in inches [millimeters]
A
B
C
(Max.)**
0.155
±
0.015
[3.94
±
0.381]
0.250
±
0.031
[6.35
±
0.787]
0.312
±
0.016
[7.92
±
0.406]
—
0.281
[7.14]
0.065
±
0.015
[1.65
±
0.381]
0.085
±
0.020
[2.16
±
0.508]
D
RS-1/8
D
C
0.020
±
0.002
[0.508
±
0.051]
0.020
±
0.002
[0.508
±
0.051]
B
RS-1/4
RS-1/2
*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" [25.4mm] minimum.
0.328 0.078 + 0.016 - 0.031 0.020
±
0.002
[8.33] [1.98 + 0.406 - 0.787] [0.508
±
0.051]
0.094
±
0.031
[2.39
±
0.787]
0.110
±
0.015
[2.79
±
0.381]
0.250
±
0.031
[6.35
±
0.787]
0.185
±
0.015
[4.70
±
0.381]
0.187
±
0.031
[4.75
±
0.787]
0.218
±
0.031
[5.54
±
0.787]
0.218
±
0.031
[5.54
±
0.787]
0.218
±
0.031
[5.54
±
0.787]
0.312
±
0.031
[7.92
±
0.787]
0.312
±
0.031
[7.92
±
0.787]
0.312
±
0.031
[7.92
±
0.787]
0.312
±
0.031
[7.92
±
7.87]
0.375
±
0.031
[9.53
±
0.787]
0.375
±
0.031
[9.53
±
0.787]
0.375
±
0.031
[9.53
±
0.787]
0.020
±
0.002
[0.508
±
0.051]
0.020
±
0.002
[0.508
±
0.051]
0.040
±
0.002
[1.02
±
0.051]
0.032
±
0.002
[0.813
±
0.051]
0.032
±
0.002
[0.813
±
0.051]
0.040
±
0.002
[1.02
±
0.051]
0.032
±
0.002
[0.813
±
0.051]
0.032
±
0.002
[0.813
±
0.051]
0.040
±
0.002
[1.02
±
0.051]
0.040
±
0.002
[1.02
±
0.051]
0.040
±
0.002
[1.02
±
0.051]
0.040
±
0.002
[1.02
±
0.051]
0.040
±
0.002
[1.02
±
0.051]
0.040
±
0.002
[1.02
±
0.051]
0.040
±
0.002
[1.02
±
0.051]
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:
Tinned Copperweld
®
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
*Wattage marked on part will be "U" characteristic
RS-1A
0.406
±
0.031 0.437
RS-1A-300
[10.31
±
0.787] [11.10]
RS-1M
RS-2
RS-2M
0.285
±
0.025
[7.24
±
0.635]
0.311
[7.90]
0.625
±
0.062 0.765
[15.88
±
1.57] [19.43]
0.500
±
0.062 0.562
[12.70
±
1.57] [14.27]
RS-2B
0.560
±
0.062 0.622
RS-2B-300
[14.22
±
1.57] [15.80]
RS-2C
RS-2C-17
RS-2C-23
RS-5
RS-5-69
RS-5-70
0.500
±
0.062 0.593
[12.70
±
1.57] [15.06]
0.500
±
0.062 0.593
[12.70
±
1.57] [15.06]
0.500
±
0.062 0.593
[12.70
±
1.57] [15.06]
0.875
±
0.062
[22.23
±
1.57]
1.0
[25.4]
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). 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"
RATED POWER IN %
120
100
80
0.875
±
0.062 0.937
[22.23
±
1.57] [23.80]
0.875
±
0.062
[22.23
±
1.57]
1.0
[25.4]
RS-7
60
CHAR. V
40
20
0-65 -50
1.22
±
0.062
1.28
[30.99
±
1.57] [32.51]
1.78
±
0.062
1.87
[45.21
±
1.57] [47.50]
1.78
±
0.062
1.84
[45.21
±
1.57] [46.74]
1.78
±
0.062
1.87
[45.21
±
1.57] [47.50]
RS-10
RS-10-38
CHAR. U
0
25
50
150
250
350
RS-10-39
Derating
AMBIENT TEMPERATURE IN
°
C
**B (Max.) dimension is clean lead to clean lead.
PERFORMANCE*
TEST
Thermal Shock
Short Time Overload
Dielectric Withstanding Voltage
Low Temperature Storage
High Temperature Exposure
Moisture Resistance
Shock, Specified Pulse
Vibration, High Frequency
Load Life
CONDITIONS OF TEST
TEST LIMITS
Characteristic U
Characteristic V
±
(0.2% + 0.05Ω)
∆R ±
(2.0% + 0.05Ω)
∆R
±
(0.2% + 0.05Ω)
∆R ±
(2.0% + 0.05Ω)
∆R
±
(0.1% + 0.05Ω)
∆R ±
(0.1% + 0.05Ω)
∆R
±
(0.2% + 0.05Ω)
∆R ±
(2.0% + 0.05Ω)
∆R
±
(0.5% + 0.05Ω)
∆R ±
(2.0% + 0.05Ω)
∆R
±
(0.2% + 0.05Ω)
∆R ±
(2.0% + 0.05Ω)
∆R
±
(0.1% + 0.05Ω)
∆R ±
(0.2% + 0.05Ω)
∆R
±
(0.1% + 0.05Ω)
∆R ±
(0.2% + 0.05Ω)
∆R
±
(0.5% + 0.05Ω)
∆R ±
(3.0% + 0.05Ω)
∆R
±
(0.1% + 0.05Ω)
∆R
±
(1.0% + 0.05Ω)
∆R
Rated power applied until thermally stable, then a min. of 15 minutes at - 55°C
5 x rated power (3.75 watt and smaller), 10 x rated power (4 watt and larger) for 5 seconds
500 minimum for RS-1/8 thru RS-1A, 1000 for all others, duration of 1 minute
- 65°C for 24 hours
250 hours at: U = + 250°C, V = + 350°C
MIL-STD-202 Method 106, 7b not applicable
MIL-STD-202 Method 213, 100g's for 6 milliseconds, 10 shocks
Frequency varied 10 to 2000Hz, 20g peak, 2 directions 6 hours each
2000 hours at rated power, + 25°C, 1.5 hours “ON”, 0.5 hours “OFF”
5 to 10 sec., 5 or 10 lb pull test (depending on size),
Terminal Strength
torsion test - 3 alternating directions, 360° each
*All
∆R
figures shown are maximum, based upon testing requirements per MIL-PRF-26.
Document Number 30204
Revision 10-Jun-02
For technical questions, contact ww2bresistors@vishay.com
www.vishay.com
117
