RPS250 Datasheet, PDF (1/4 Pages) Vishay Siliconix – Power Resistor for Mounting onto a Heatsink Thick Film Technology

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RPS 250
Vishay Sfernice
Power Resistor for Mounting onto a Heatsink
Thick Film Technology
FEATURES
• High power rating: 250 W
• High overlowead capability up to 4 times
nominal power (see energy curve)
• Easy mounting
• Low thermal radiation of the case
• Material categorization: for definitions of compliance
please see www.vishay.com/doc?99912
Developed for specific applications such as railroad electrical traction, this series can bear short overloads as high as fifteen
times the nominal power. Designed to be mounted onto a heatsink, these power resistors exhibit remarkable characteristics.
DIMENSIONS in millimeters
RPS 250D
26 ^{± 1}
57
16.5
73
34
56
Ø 7.2
Ø 4.2
Note
• Tolerance unless stated: ± 0.2 mm
STANDARD ELECTRICAL SPECIFICATIONS
MODEL
RPS 250
SIZE
250
RESISTANCE
RANGE

0.24 to 1M ⁽¹⁾
RATED POWER
P_{25 °C}
W
250
Note
(1) _{E24 series}
MECHANICAL SPECIFICATIONS
Mechanical Protection
Insulated case and resin for
potting UL 94 V-0
Resistive Element
Cermet
Substrate
Alumina onto aluminum base
End Connections
Screws M4 (M5 on request)
Tightening Torque
Connections
2 Nm
Weight
170 g ± 10 %
ENVIRONMENTAL SPECIFICATIONS
Thermal Resistance
Temperature Range
R_{th (j - c)} 0.22 °C/W
-55 °C to 125 °C
Climatic Category
55 / 125 / 56
2 M4 USEFUL DEPTH: 6
LIMITING ELEMENT
VOLTAGE U_L
V
5000
TOLERANCE
±%
1, 2, 5, 10
TEMPERATURE
COEFFICIENT
± ppm/°C
150
TECHNICAL SPECIFICATIONS
Power Rating
Chassis Mounted
250 W at 50 °C continuous
1000 W at 25 °C for 10 s
Temperature
Coefficient
Standard
± 250 ppm/°C < 1 
± 150 ppm/°C > 1 
Dielectric Strength 
MIL STD 202 (301), 
min, 10 mA max.
L connections 7 kV_RMS
H connections 12 kV_RMS
Insulation Resistance
 10⁶ M
Inductance
 50 nH
Capacitance Resistor/
Ground
< 40 pF
< 120 pF
Revision: 12-Dec-14
1
Document Number: 50007
For technical questions, contact: [e-mail]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000