Siemens 5SY7650-8 5SY MCB 3+N-pole 50 A D-curve 15 kA. Miniature circuit breaker 400 V 15kA, 3+N-pole, D, 50 A, D=70 mm. It belongs to Basic Devices. Recorded manufacturer technical characteristics include Poles: 4; Rated current: 50 A; Tripping curve: D.