Square D LJL36600U43X Molded Case Circuit Breaker

The Square D PowerPact LJL36600U43X is a 3‑pole, 600 A molded‑case circuit breaker in the PowerPact LJL family, designed for 600 V AC distribution and configured with line‑ and load‑side lug terminals for straightforward wiring. Equipped with a Micrologic 5.3A trip unit (LSI), it provides Long‑Time, Short‑Time, and Instantaneous protection and is UL listed for industrial use. Rated interrupting capacity varies by voltage, with 25 kAIC at 600 VAC and 65 kAIC at 480 VAC, enabling protection of feeders and heavy‑duty circuits against short circuits. Its rugged molded‑case construction supports reliability in distribution panels and industrial installations where high current protection is required. Manufactured by Square D (Schneider Electric), this unit is part of the PowerPact LJL lineup and is intended for 3‑phase systems in commercial or industrial settings that demand robust, field‑installable protection. Line‑ and load‑side lug terminals facilitate secure terminations without adapters, contributing to a clean, code‑compliant installation in challenging environments.