Siemens 5SV3645-8 Residual Current Operated Circuit Breaker, 4-pole, Type A, Selective. Residual current operated circuit breaker, 4-pole, type A, selective, In: 125 A, 300 mA, Un AC: 400 V. It belongs to RCCBs. Recorded manufacturer technical characteristics include Poles: 4P; RCD type: A; Rated current: 125 A; Voltage rating: AC 400 V; Residual current: 300 mA.