Siemens 5SV3444-8 Residual Current Operated Circuit Breaker. Residual current operated circuit breaker, 4-pole, type A, selective, In: 40 A, 100 mA, Un AC: 400 V. It belongs to RCCBs. Recorded manufacturer technical characteristics include Poles: 4P; RCD type: A; Rated current: 4 A; Voltage rating: AC 400 V; Residual current: 100 mA.