For use in switching power supplies, inverters, choppers, welding power supplies, free-wheeling diodes, and high-frequency rectifiers, the QRS061K001 600V/1-kA, single fast diode module works on 230-Vac lines or 340-Vdc lines and has an average current rating of 420A. Isolation voltage is 3 kVrms and an optimized thermal management system incorporating an AIN substrate with a copper base keeps things cool. Other features include a recovery time of 150 ns maximum and an isolated mounting. Sample price for the QRS061K001 is $200 each. POWEREX INC., Youngwood, PA. (800) 451-1415.