The Siemens 6EP1436-1SH01 is a SITOP power20 industrial power supply delivering 480 W at 20 A from a 400 to 500 V AC three-phase input, 50/60 Hz. That 20 A rail is the headline number — it tells you the continuous load this supply can carry without sagging, sized for a control cabinet feeding multiple 24 VDC loads like PLCs, I/O racks, contactor coils, and small valve banks. The three-phase input means it draws from all legs evenly, which keeps the upstream breaker balanced and reduces the neutral return current compared to a single-phase unit of the same power. It's a panel-mount DIN-rail form factor — 130 x 240 x 131 mm — so it fits a standard enclosure footprint.
The 480 W / 20 A output at 24 VDC is the working capacity. If your cabinet draws 18 A continuous, this supply runs at 90 % load — fine for a clean environment, but derate if ambient exceeds 40 °C or if the enclosure has poor airflow. The 400-500 VAC three-phase input covers standard European and North American 400 V and 480 V industrial mains without a transformer tap change.