Miniature circuit breaker 230/400 V 15kA, 1-pole, C, 40 A Miniature circuit breaker SENTRON for fail-safe short-circuit and overload protection for residential and non-residential buildings and special industrial applications. Assembly and disassembly of the device without tools using a double slide. Any combination of conductors and busbars thanks to dual-chamber terminals. Simple wiring of the infeed through the rear busbar. The 5SY miniature circuit breakers are available in 1-, 2-, 3-, 4-pole and 1+N- and 3+N-pole versions. All accessories can be used as standard for all 5SY miniature circuit breakers. Simply safe with the protection devices from SENTRON.