Square D PowerPact LDA34400WU43X L-Frame 3P 400A Mission Critical I-Line
600A Frame | 400A | 3P | 25kA@240V, 18kA@480V, 14kA@600V | Electronic Mission Critical (MicroLogic 5.3A LSI)
The PowerPact LDA34400WU43X 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 standard interrupting capacity of 25kA@240V, 18kA@480V, 14kA@600V at 480Y/277V AC for dependable overcurrent protection performance. The LDA34400WU43X 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. The LDA34400WU43X features i-line plug-on configuration with i-line plug-on connections and I-Line Bus Connection terminations for straightforward installation. Accepting (2) 3/0-500 kcmil Al/Cu conductors, this breaker measures 15.24" H x 7.09" W x 8.07" D and weighs ~30 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 LDA34400WU43X 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. As part of the proven PowerPact family, the LDA34400WU43X 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 Mission Critical (MicroLogic 5.3A LSI) trip protection rated 400A at 480Y/277V AC. Frame size: 600A. Interrupting capacity: 25kA@240V, 18kA@480V, 14kA@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.
