1SDA066639R1

The ABB 1SDA066639R1 is a rear mechanical interlock plate designed exclusively for SACE Tmax XT1 fixed-type molded case circuit breakers (MCCBs). This genuine ABB industrial automation component establishes a physical safety interlocking mechanism between circuit breakers. By preventing multiple circuit breakers from closing at the same time, it ensures critical isolation procedures are maintained. This is an essential safety feature during system maintenance, changeovers, or standard power distribution routing.