Square D LX36300G – 300A 3 Pole Molded Case Circuit Breaker Buy Direct

Providing comprehensive circuit defense, this 300A three-pole MCCB includes a Micrologic trip unit with Long, Short, Instantaneous, and Ground Fault (LSIG) capabilities. The solid-state design ensures highly repeatable trip curves. This legacy component mounts into Square D I-Line switchboards. For system modernization, it is replaced by the PowerPacT LJA36400U44X, requiring an HNM1BL filler plate and trip unit adjustment to 300A. True RMS sensing prevents nuisance tripping from harmonics.