SITOP PSU3800 12 V/20 A Regulated power supply input: 3 AC 400-500 V output: 12 V DC/20 A optimized for battery charging The SITOP PSU3800 3-phase power supplies are optimally suited for battery charging thanks to the constant current characteristic. For other applications, the output characteristic can also be switched to latching disconnection. The 3-phase wide-range input enables worldwide use. The slim design takes up little space on the mounting rail. Installation clearances are not required. Regardless of the industry or requirements, Siemens offers reliable and efficient power supplies for every plant.