Siemens 6EP3123-0TA00-0AY0 SITOP PSU3400 12 V/8 A Stabilized Power Supply. SITOP PSU3400 12 V/8 A stabilized power supply input: 24 V DC (14…32 V) output: 12 V DC/8 A. It belongs to SITOP PSU3400. Recorded manufacturer technical characteristics include Efficiency: approx. 90 %; Output Current: 8 A; Current Limitation: typ. 9 A; Input Voltage (DC): 14 ... 32 V; Output Voltage (DC): 12 V; Built-in incoming fuse: 15 A; Input Current (at 24V): 4.5 A; Output Overvoltage Protection: < 22 V.