egrand mcb series Miniature Circuit Breaker Application Legrand miniature circuit breaker is mainly suitable for overload and short circuit protection. It is especially used for illumination and distribution in industry and commerce, etc. it is of pleasing outlook & high breaking capacity, reliable performance, high inflammable resistance and shock resistance for long service life. It is within the circuit of AC 50/60HZ, rated voltage of single pole up to 230V, two, three or four poles up to 400V. It can also be for an unfrequent switchover of the circuit and illumination under normal conditions