Square D LXI36400 I-Line 3-Phase Circuit Breaker

Square D LXI36400 I-Line Molded Case Circuit Breaker is a three-pole, 400 A, 600 V protection device in the Square D LXI family designed for industrial switchgear and distribution panels. It uses a Micrologic trip unit (Series B) to provide long-time, short-time, and instantaneous overcurrent protection, with an I-Line plug-in mounting for fast installation and convenient field replacement. The LXI36400 is rated for up to 200 kAIC interrupting capacity at 480 V, pairing robust fault-current handling with a 600 V AC operating voltage. Line and load terminations are compatible with aluminum or copper conductors, and the unit is suitable for industrial applications such as motor-control centers, switchboards, and panelboards needing reliable protection of feeders and machinery in 3-phase systems.