Square D PowerPact LLL34400WU33X L-Frame 3P 400A Mission Critical UM
600A Frame | 400A | 3P | 125kA@240V, 100kA@480V, 50kA@600V | Electronic Mission Critical (MicroLogic 3.3S LSI)
The PowerPact LLL34400WU33X from Schneider Electric's Square D product line is a L-Frame 3-pole 400-amp circuit breaker designed for professional electrical installations and industrial systems. This MCCB delivers very high interrupting capacity of 125kA@240V, 100kA@480V, 50kA@600V at 480Y/277V AC for dependable overcurrent protection performance. The LLL34400WU33X features a MicroLogic 3.3S 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 unit mount installation, the LLL34400WU33X utilizes lug (unit mount) connections with AL400L61K3/AL600LS52K3 terminations designed for reliable conductor termination. The unit accommodates (2) 2/0-500 kcmil Al/Cu conductors within compact overall dimensions of 10.24" H x 5.51" W x 5.67" D weighing ~25 lbs, optimizing installation density in electrical distribution equipment. Certified to UL 489, CSA, and IEC/EN 60947-2 international standards, the LLL34400WU33X ensures compliance across diverse global markets and jurisdictions. This breaker serves commercial and industrial power distribution, feeder protection, motor circuit applications, and switchgear installations requiring dependable L-Frame frame interrupting performance. The LLL34400WU33X 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 Mission Critical (MicroLogic 3.3S 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.
