Siemens sitop psu300m din rail power supply 24v dc 480w 3 phase siemens 6ep1437 3ba10 the siemens 6ep1437 3ba10 sitop is a din rail three phase modular power supply with a wide range voltage input for global use it is slim in design with a power boost functionality that supplies up to 15 times the rated current allowing free start up of loads with high inrush currentthis 40a switched mode power supply has plug in terminals for simple electrical connection and minimized connection time