RWST Datasheet, PDF (2/3 Pages) Vishay Siliconix – Fixed Wirewound High Power Vitreous Resistors Electrical Traction Model

RWST
Vishay Sfernice
Fixed Wirewound High Power Vitreous Resistors
Electrical Traction Model
MECHANICAL SPECIFICATIONS
Mechanical Protection
Vitreous enamel
Resistive Element
Ni-Cr wire
Connections
CS supporting collars
AN Collar or B
on Request
Average Unit Weight
225 to 2200g
ENVIRONMENTAL SPECIFICATIONS
Temperature Limits
– 55°C + 450°C
Climatic Category
– 55°C/+ 200°C/56 days
ELECTRICAL SPECIFICATIONS
Resistance Range
2.7Ω to 430kΩ
(E12-E24 preferred series values)
Resistance Tolerance
Standard
Power Rating
Temperature Coefficient
Shelf Life
± 5%
95W to 800W at 25°C
75ppm/°C (typical)
0.1% year (typical)
PERFORMANCE
TESTS
Short Time Overload
Climatic Sequence
Humidity
(Steady State)
Thermal Shock
Shock
Vibration
Terminal Strength
AN
B
Load Life
CONDITIONS
10Pr during 5s
Voltage limited at < 5000V
– 55°C
+ 200°C
56 days
95% relative humidity
Load at 100% Pr followed by cold
temperature exposure at –55°C/15’
severity 50A
9 shocks/each side
severity 55B
Traction 40Ncm
Torque 60Ncm
90’/30’ cycle
1000h at Pr 25°C
REQUIREMENTS
2% or 0.05Ω
2% or 0.05Ω
Insulation resistance 100MΩ
3% or 0.05Ω
Insulation resistance 100MΩ
2% or 0.05Ω
1% or 0.05Ω
1% or 0.05Ω
1% or 0.05Ω
5%
TYPICAL VALUES AND DRIFTS
0.5%
0.5%
0.5%
0.5%
0.25%
0.25%
0.5%
1000h
1%
5000h
2%
SPECIAL FEATURES
RWST STYLE
Designation NF C 93-214
Power Rating at 25°C
Maximum Power
Rating at 25°C
Ohmic Range
(E12, E24 series)
Limiting Element Voltage
P max.
Critical Resistance
25 x 138
–
95W
110W
25 x 168
RB 25 x 168
160W
180W
30 x 250
RB 30 x 250
280W
320W
40 x 370
–
500W
600W
50 x 373
–
700W
800W
2.7Ω
82kΩ
1400V
18kΩ
2.7Ω 100kΩ
1900V
20kΩ
4.7Ω 220kΩ
3000V
30kΩ
8.2Ω 360kΩ
4500V
36kΩ
12Ω 430kΩ
5000V
30kΩ
NON INDUCTIVE WINDING
For high frequencies, low self induction resistors are available with special windings.
RWSTNI designation.
MODEL AND
STYLE
Ohmic range
(E12 series)
RWSTNI
25 x 138
22Ω
2.5kΩ
RWSTNI
25 x 168
22Ω
4kΩ
RWSTNI
30 x 250
120Ω
6.8kΩ
www.vishay.com
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For technical questions, contact [e-mail]
RWSTNI
40 x 370
120Ω
8.2kΩ
RWSTNI
50 x 373
150Ω
8.2kΩ
Document Number: 50017
Revision 13-Jan-04