The 1020011 is a UL 1077 supplementary protector from the Phoenix Contact TMC 7 series, designed for reliable overcurrent protection in systems where easy installation and maintenance are required. This series features a snap-action mechanism to reduce contact wear and a trip-free design to ensure safety by preventing the circuit from closing during an overcurrent event. These dual-rated (AC/DC) circuit breakers offer visual status indication and are available in multiple pole configurations and trip curves. Common applications include motor control circuits, lighting controls, control power transformers, and PLC I/Os.