Square D PowerPact MJL36400 M-Frame 3P 400A MCCB Lug
800A Frame | 400A | 3P | 100kA@240V, 65kA@480V, 25kA@600V | Electronic (ET1.0 Fixed)
Designed for heavy-duty electrical distribution, the Square D MJL36400 M-Frame circuit breaker provides reliable protection with advanced electronic trip technology. This 3-pole device is rated at 400A with 600V AC voltage capability and an interrupting capacity of 100kA@240V, 65kA@480V, 25kA@600V (High (J) interrupting class). It features a ET1.0 electronic trip unit providing basic overcurrent protection with adjustable settings, rated at 80% continuous current per NEC Article 240.6. The MJL36400 is configured with AL800CB Lug connections for reliable cable termination. This breaker is UL 489 listed and CSA certified with dual UL/IEC ratings, ensuring compliance across North American and international installations. With its combination of advanced protection features and robust construction, the MJL36400 is an excellent choice for demanding electrical distribution applications. The wire range accommodates 1/0-500 kcmil Al/Cu conductors for flexible installation options. This configuration is suitable for both new installations and retrofit applications in existing switchgear and panelboard assemblies. The PowerPact platform supports a comprehensive range of accessories for enhanced functionality, monitoring, and communication capabilities. Schneider Electric provides extensive technical documentation, CAD files, and application engineering support for proper selection and installation. All terminal connections are designed for easy installation and reliable long-term performance under continuous operating conditions. Physical dimensions of 10.04" H x 9.00" W x 5.79" D with an approximate weight of ~16 lbs ensure compatibility with standard enclosures.
Key Features
This PowerPact MCCB features Electronic (ET1.0 Fixed) trip protection rated 400A at 600V AC. Frame size: 800A. Interrupting capacity: 100kA@240V, 65kA@480V, 25kA@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.
