Vishay Intertechnology recently introduced a line of high power resistors that meet the AEC-Q200 automotive qualification. Designed for direct mounting on a heatsink, the Vishay Sfernice LPSA 300, LPSA 600, and LPSA 800 deliver high power dissipation and pulse handling capabilities intended to reduce component counts and lower costs in automotive applications.
With power ratings of 300 W, 600 W, and 800 W, the devices can serve as precharge or discharge resistors for EV inverters. In addition, their pulse capability from 400 J to 1500 J for pulses from 0.05 s to 0.5 s allows them to replace larger wire-wound resistors.
The resistors offer high-temperature operation to +175 °C and resistance values from 0.03 Ω to 900 kΩ. They also have dielectric strengths up to 12 kV RMS. The RoHS-compliant devices offer a non-inductive design and tolerances down to ± 1 %. Vishay’s testing includes temperature cycling at 1,000 cycles and 1,000 hours of operational life.
Samples and production quantities of the new resistors are available now, with lead times of 10 to 12 weeks.