Siemens 5SV3644-7 Residual current operated circuit breaker. Residual current operated circuit breaker, 4-pole, type F, selective, In: 40 A, 300 mA, Un AC: 400 V. It belongs to RCCBs. Recorded manufacturer technical characteristics include Poles: 4P; RCD type: F; Rated current: 4 A; Voltage rating: AC 400 V; Residual current: 300 mA.