Miniature circuit breaker 230/400V 25kA, 1-pole, B, 10A for meter pre-area Miniature circuit breaker SENTRON 5SY for safe short-circuit and overload protection for standard applications in residential and commercial buildings. Tool-free assembly and disassembly of the device. Simple wiring of the feed through the rear busbar. The 5SY miniature circuit breakers are available in 1-, 2-, 3-, 4-, 1+N and 3+N-pole versions as well as other special types. The extensive accessories, such as auxiliary switches, enable the functions to be expanded in many ways. Simply safe with the protective devices from SENTRON.