INB1 mini circuit breaker is mainly suitable for overload and short circuit protection. It is especially used for illumination and distribution in industry and commerce. It has the characteristic of pleasing outlook&high breaking capacity. Its frame and parts adopts plastic of light weight, reliable performance, high inflammable resistance and shock resistance that is for long service life. It is mainly used for overload and short circuit protection in the circuit of AC50/60Hz, rated voltage of single pole up to 230V, two, three or four pole up to 400V. It can also be used for infrequent switch over of the circuit and illumination under normal conditions.