The ABB SOR-1SDA063548R1 is a Shunt Opening Release (SOR), commonly known as a Shunt Trip Coil. It is an essential remote tripping accessory for ABB's Molded Case Circuit Breakers (MCCBs). This electromechanical device enables the instantaneous electrical tripping of a compatible circuit breaker from a remote location when its coil is energized by an external control signal.