Square D PowerPact LLL36400RU43X L-Frame 3P 400A Field-Interch Electronic 100%
600A Frame | 400A | 3P | 125kA@240V, 100kA@480V, 50kA@600V | Electronic Field-Interch 100% (MicroLogic 5.3A LSI)
The PowerPact LLL36400RU43X 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 600V AC for dependable overcurrent protection performance. The LLL36400RU43X 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. This unit mount breaker features lug (unit mount) connections with AL400L61K3/AL600LS52K3 terminations, accepting (2) 2/0-500 kcmil Al/Cu conductors for versatile wiring applications. With overall dimensions of 10.24" H x 5.51" W x 5.67" D and weighing ~25 lbs, the LLL36400RU43X delivers L-Frame frame protection in a space-efficient package suitable for dense electrical equipment layouts. Certified to UL 489, CSA, and IEC/EN 60947-2 international standards, the LLL36400RU43X 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. As part of the proven PowerPact family, the LLL36400RU43X delivers dependable protection backed by Schneider Electric's extensive global engineering heritage and comprehensive industry-leading technical support resources.
Key Features
This PowerPact MCCB features Electronic Field-Interch 100% (MicroLogic 5.3A 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.
