The SITOP PSU400M power supply with a 600 V DC input is suitable as an efficient DC/DC converter for drive and battery systems; large input range and temperature range, high efficiency; slim design; with 50% extra power for 5 s/min. A voltage surge limiter is available as an accessory as ballast for the PSU400M. This gives the option of connecting the DC/DC converter directly to a DC voltage of up to 900 V DC.