Y5SM1 series mini circuit breaker is mainly suitable suitable for overload and short circuit proteciton.It is especially used for illumination and distribution in industry and commerce.It is of pleasing out-look.light weight,reliable performance,high breaking capactiy ,etc.Its frame and parts adopt plastics of high inflammable resistance and shock resistance for long service life.It is mainly used for overolad and short circuit protection within the circuit of AC 50Hz/60Hz ,rated voltage of singe pole up to 240V,two,three or four poles up to 415V.It can also be used for an unfrequent switchover of the cirecuit and illumination under normal conditions.