The ABB YO‑1SDA038286R1 is a shunt trip / shunt opening release accessory designed for use with ABB low‑voltage circuit breakers, particularly the EMax / Tmax family of molded case circuit breakers. It provides a remote trip function by allowing the breaker to be opened electrically from a control signal. The device operates on a 24 V DC coil and is used in applications requiring automated disconnection of power in response to external control logic, safety systems, or protective circuitry.
