The SM1 is a modern series of circuit breakers with thermal and magnetic trip releases and high breaking capacity. The SM1 series provides motor control and protection up to 15kW at 400V/20HP 480V/30HP 600V by choosing a suitable adjustment range - 0.1 to 32A. The SM2 and SM2 series provide motor control and protection up to 45kW at 400V/75HP 480V/100HP 600V by choosing a suitable adjustment range - 28 to 100A. A magnetic trip indicator integrated on the SM1 breakers avoids dangerous closing operations during short-circuit conditions. The SM1 types are suitable for isolation according to IEC/EN 60947 standards. Their high breaking capacity allows the exclusion of protection fuses on the majority of installations.