Schneider Electric SED36400LS Circuit Breaker

Schneider Electric's Square D SED36400LS is a 3-pole insulated-case circuit breaker (MCCB) in the SED family, rated for 400 A continuous current and designed for 600 V AC service. This draw-out device uses a Micrologic Series B trip unit with LSIG protection—Long-Time, Short-Time, Instantaneous, and Ground-Fault functions—to provide precise overcurrent protection for three-phase feeders. The unit's interrupting ratings are 150 kAIC at 240 VAC, 100 kAIC at 480 VAC, and 85 kAIC at 600 VAC, enabling rapid fault clearance across common distribution voltages. The SED36400LS is intended for main or branch-circuit protection in distribution panels, switchgear, and motor-control centers where a 3-pole, 400 A, 600 V MCCB is required. Its draw-out construction supports testing and maintenance within compatible enclosures, aligning with standard industrial distribution practices.