SH201 1 Pole low voltage electrical circuit breaker is mainly used in AC50/60Hz single pole 230V or two,three,four pole 400V voltage for overload and short-circuit protection as well as for infrequent on-and-off switching electric equipment and lighting circuit under normal conditional the product is suitable for industry,business,building,residence,etc. It's conformity with GB10963, IEC60898 standards.