1SDA066318R1

The ABB 1SDA066318R1 is a Shunt Opening Release (SOR) accessory engineered for the ABB SACE Tmax XT series of Molded Case Circuit Breakers (MCCBs), covering frames XT1, XT2, XT3, and XT4. This electrical release unit allows the circuit breaker to open remotely when energized by an AC control voltage ranging from 380V to 440V AC. It is widely used in heavy industrial switchgear, motor control centers, and automated safety shutdown or emergency tripping configurations.