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Thick Film Power Resistors Feature Power Dissipation of up to 800W at + 85°C in Compact 57mm by 60mm Footprint

28th May 2009

Vishay

ES Admin

0 0

Datasheet

Vishay Intertechnology has released new 300W, 600W, and 800W thick film power resistors featuring a small size and a broad range of resistance values. The new Vishay Sfernice LPS300, LPS600, and LPS800 thick film resistors are non-inductive (< 0.1 µH) and provide a wide resistance range of 0.3 Ω to 900 kΩ. Featuring compact footprints of 57-mm by 60-mm and low weight of 83 grams, the devices save valuable space on the circuit board, allowing designers to reduce the size of their end products.

With their high power capabilities and high dielectric strength of 12 kVRMS, the devices released today are intended for power supply, inverter, converter, snubber, and discharge resistor applications in windmills, trains, scanner and X-ray tables, and large UPS drives.

Thermal resistance for the LPSxxx resistors at rated power and + 85 °C is 0.112 °C/W junction-to-case. The devices feature a standard temperature coefficient of ± 150 ppm/°C for values above 10 Ω and tolerances from ± 1 % to ± 10 %. The RoHS-compliant resistors offer high-temperature performance from − 55 °C to + 120 °C (LPS300), + 155 °C (LPS600), and + 175 °C (LPS800).