Siemens 5SY7220-8 Miniature Circuit Breaker 5SY7 2-pole 20A D. Miniature circuit breaker 400 V 15kA, 2-pole, D, 20 A, D=70 mm. It belongs to Basic Devices. Recorded manufacturer technical characteristics include Poles: 2; Rated current: 20 A; Tripping curve: D.