The 1020023 is a supplementary protector from the Phoenix Contact TMC 7 series, engineered to provide reliable overcurrent protection and increase system uptime by isolating faulty circuits. This device features a snap-action mechanism to reduce contact wear and a trip-free design that enhances safety by preventing the circuit from being closed during an overcurrent event. The series offers dual AC/DC ratings, various pole configurations, and multiple trip curves, reducing inventory requirements. It is ideal for applications such as motor control circuits, lighting controls, control power transformers, and protecting sensitive equipment like PLC I/Os.