Square D LJA36400U31X Molded Case Circuit Breaker

Square D by Schneider Electric PowerPact L-series molded case circuit breaker, model LJA36400U31X, is a 400 A, 3-pole unit designed for 600 V AC systems with an I-Line line-side connection and a cable-in/cable-out configuration. It uses a Micrologic 3.3 electronic trip unit (LI: long-time and instantaneous protection) and is rated for 25 kAIC at 600 VAC, with 80% continuous rating. The PowerPact L-frame device weighs about 6.2 kg (approximately 13.6 lb) and measures roughly 11.7 in tall, 14.6 in wide, and 20 in deep, making it suitable for installation in industrial distribution panels to protect feeders and distribution circuits up to 400 A. Certifications include UL, CSA, and NOM.