Square D LA36300 I-Line 3 Phase Circuit Breaker

Square D LA36300 I-Line molded‑case circuit breaker is a 300 A, 3‑pole device built for 3‑phase power distribution in Square D I‑Line panelboards. This thermal‑magnetic breaker employs LI long‑time and instantaneous trip functions to protect feeders and branch circuits, and it is rated for 600 V AC operation. The unit provides an interrupting capacity of 22 kA at 600 V (30 kA at 480 V), enabling it to clear typical fault currents in commercial and light industrial installations. With an I‑Line plug‑in design, it installs quickly in compatible panels and ensures proper alignment with the bus and wiring, supporting reliable protection in distributed electrical systems.