Square D PowerPact LLA34400WU43X L-Frame 3P 400A Mission Critical I-Line
600A Frame | 400A | 3P | 125kA@240V, 100kA@480V, 50kA@600V | Electronic Mission Critical (MicroLogic 5.3A LSI)
The Schneider Electric Square D PowerPact LLA34400WU43X 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 480Y/277V AC for reliable overcurrent protection in critical electrical infrastructure. The LLA34400WU43X features a MicroLogic 5.3A 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. Configured for i-line plug-on installation, the LLA34400WU43X utilizes i-line plug-on connections with I-Line Bus Connection terminations designed for reliable conductor termination. The unit accommodates (2) 3/0-500 kcmil Al/Cu conductors within compact overall dimensions of 15.24" H x 7.09" W x 8.07" D weighing ~30 lbs, optimizing installation density in electrical distribution equipment. Compliant with UL 489, CSA C22.2 No.5, and IEC/EN 60947-2 international standards, the LLA34400WU43X carries multiple certifications for worldwide acceptance and specification. Ideal for commercial buildings, industrial facilities, data centers, healthcare facilities, and critical infrastructure power distribution requiring reliable 400A 3-pole overcurrent protection. Backed by Schneider Electric's global expertise in power distribution solutions, the LLA34400WU43X ensures dependable protection for critical electrical infrastructure with comprehensive factory warranty coverage and support.
Key Features
This PowerPact MCCB features Electronic Mission Critical (MicroLogic 5.3A LSI) trip protection rated 400A at 480Y/277V 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.
