Siemens 6EP1437-2BA20 SITOP PSU300S 40A STABILIZED POWER SUPPLY. SITOP PSU300S 40 A stabilized power supply input: 400-500 V 3 AC output: 24 V DC/40 A. It belongs to 3-phase, 24 V DC. Recorded manufacturer technical characteristics include Efficiency: 91.5 %; Input type: 3-phase AC; Active power: 960 W; Rated current: 40 A; Rated frequency: 50-60 Hz; Rated input voltage: 400-500 V AC; Rated output voltage: 24 V DC; Current limitation (typ.): 50 A.