Miniature circuit breaker 400V 25kA, 2-pole, 40A, T=70mm, only magnetic release Miniature circuit breaker SENTRON 5SY for safe short-circuit protection in IT networks, e.g. in hospitals. Tool-free assembly and disassembly of the device. Any combination of conductors and busbar thanks to double-chamber terminal. Simple wiring of the feed through the busbar at the rear. The miniature circuit breakers 5SY for IT networks are available in 2-, 3- and 4-pole versions. All accessories can be used uniformly for all miniature circuit breakers 5SY. Simply safe with the protective devices from SENTRON.