Siemens 5SY6663-6 5SY MCB 3+N-pole 63 A B-curve 6 kA. Miniature circuit breaker 400 V 6kA, 3+N-pole B, 63 A, D=70 mm. It belongs to Basic Devices. Recorded manufacturer technical characteristics include Poles: 3+N; Rated current: 63 A; Rated voltage: 400 V; Tripping curve: B; Breaking capacity: 6 kA.