Siemens 5SV3646-8 Residual Current Circuit Breaker. Residual current operated circuit breaker, 4-pole, type A, selective, In: 63 A, 300 mA, Un AC: 400 V. It belongs to RCCBs. Recorded manufacturer technical characteristics include Poles: 4; Selectivity: Selective; Rated current: 63 A; Tripping type: A; Rated voltage AC: 400 V; Rated residual current: 300 mA.