Square D PowerPact LLL36400CU53X L-Frame 3P 400A Electronic MCCB 100%
600A Frame | 400A | 3P | 125kA@240V, 100kA@480V, 50kA@600V | Electronic (MicroLogic 5.3E LSI)
The Schneider Electric Square D PowerPact LLL36400CU53X is a L-Frame molded case circuit breaker rated at 400 amperes for 3-pole applications in commercial and industrial power distribution systems. This premium breaker delivers very high interrupting capacity rated at 125kA@240V, 100kA@480V, 50kA@600V, operating at 600V AC for reliable overcurrent protection in critical electrical infrastructure. The LLL36400CU53X features a MicroLogic 5.3E LSI electronic trip unit providing adjustable long-time delay, short-time delay, instantaneous, and ground fault protection settings for precise overcurrent coordination. This advanced electronic trip technology enables optimized protection curves, selective coordination with upstream and downstream protective devices, and significantly enhanced system reliability. The LLL36400CU53X features unit mount configuration with lug (unit mount) connections and AL400L61K3/AL600LS52K3 terminations for straightforward installation. Accepting (2) 2/0-500 kcmil Al/Cu conductors, this breaker measures 10.24" H x 5.51" W x 5.67" D and weighs ~25 lbs, providing a compact footprint for space-efficient installation in panelboards, switchboards, and motor control centers. UL 489 listed and CSA C22.2 No.5 certified, the LLL36400CU53X meets IEC/EN 60947-2 international standards for global project specification and acceptance. Applications include feeder circuit protection, branch circuit protection, motor control center installations, panelboard and switchboard applications, and industrial power distribution systems requiring L-Frame frame-class protection capabilities. The LLL36400CU53X exemplifies Schneider Electric's PowerPact platform engineering excellence, delivering consistent protection performance with robust construction designed for long service life in demanding environments.
Key Features
This PowerPact MCCB features Electronic (MicroLogic 5.3E LSI) trip protection rated 400A at 600V AC. Frame size: 600A. Interrupting capacity: 125kA@240V, 100kA@480V, 50kA@600V. Designed for reliable overcurrent protection in industrial and commercial power distribution systems.
Applications
Suitable for main distribution panels, motor control centers, switchboards, and feeder circuit protection in industrial facilities, data centers, and commercial buildings. Compliant with UL 489, CSA C22.2 No.5, IEC/EN 60947-2, NOM, CCC, CE.
