Miniature circuit breaker 400V 15kA, 4-pole, C, 63A, T=70mm Miniature circuit breaker SENTRON 5SY for safe short-circuit and overload protection for residential buildings, commercial buildings and special industrial applications. Tool-free assembly and disassembly of the device using a double slide. Any combination of conductors and busbar thanks to the double-chamber terminal. Simple wiring of the feed through the busbar at the rear. The 5SY miniature circuit breakers are available in 1-, 2-, 3-, 4- as well as 1+N and 3+N-pole versions. All accessories can be used uniformly for all 5SY miniature circuit breakers. Simply safe with the protective devices from SENTRON.