The ABB 1SDA058273R1 is a mechanical key lock accessory designed for use with ABB Emax series low‑voltage power circuit breakers. It allows a circuit breaker to be securely locked in the open (OFF) position using a specific key (Key No. 20007), providing a physical safety interlock. This accessory is typically installed on the breaker’s operating handle or mechanism to prevent accidental or unauthorized switching. It is suitable for industrial electrical distribution panels where safe isolation is required.
