Allen-Bradley 1489-AMRA3 Auxiliary Contact – 1 C/O, Right-Mount, for 1489-M Circuit Breakers

The 1489-AMRA3 snaps onto the right side of a Bulletin 1489-M Thermal-Magnetic Circuit Breaker. It features a Changeover (C/O) contact—essentially 1 NO (Normally Open) and 1 NC (Normally Closed) contact sharing a common terminal. This allows you to simultaneously trigger an alarm and cut power to a control circuit when the main breaker opens.