The PHOENIX CONTACT part TMC 1 M1 100 4 0A is a thermomagnetic circuit breaker designed for reliable and efficient circuit protection. It features a 1-position configuration and offers a normal blow operation for enhanced safety. This circuit breaker includes 1 normally open (N/O) contact that allows for seamless control and monitoring of electrical currents. With its universal foot, it can be easily mounted on NS 32 or NS 35 rails, providing flexibility in installation. Trust in the quality and performance of this PHOENIX CONTACT circuit breaker for your electrical protection needs.