RPS250

www.vishay.com RPS 250 Vishay Sfernice Power Resistor for Mounting Onto a Heatsink Thick Film Technology LINKS TO ADDITIONAL RESOURCES 3D 3D 3D Models FEATURES Compliant with requirement #26 of NF-EN45545-2 High power rating: 250 W High overload 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 ZA3 73 RPS 250A ZA3 73 56 56 Ø 21 60 10.5 6 35.8 Ø 21 60 10.5 6 38.1 26 ± 1 28 ± 1 16.2 57 34 18.7 57 Ø 7.2 Ø 7.2 Ø 4.2 Ø 4.2 Note Tolerance unless stated: ± 0.2 mm 2 x M4 USEFUL DEPTH: 6 2 x M4 USEFUL DEPTH: 6 STANDARD ELECTRICAL SPECIFICATIONS MODEL RPS 250 SIZE 250 RESISTANCE RANGE Ω 0.24 to 1M (1) RATED POWER P25 °C W 250 Note (1) E24 series MECHANICAL SPECIFICATIONS Flammability 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 Rth (j - c) 0.22 °C/W -55 °C to +125 °C Climat...