LJA36400U31X - 400A PowerPacT Micrologic LI Circuit Breaker

LJA36400U31X - 400A PowerPacT Micrologic LI Circuit Breaker

The LJA36400U31X is a 400-amp, 3-pole molded-case circuit breaker designed for three-phase electrical distribution systems requiring dependable overcurrent protection. With an interrupting rating of 65kA at 480VAC, it's a practical choice for installations where available fault current is higher and reliable protection is critical.

In many commercial and industrial facilities, circuit breakers like the LJA36400U31X quietly do one of the most important jobs in the electrical system—protecting equipment from overloads and short circuits before costly damage can occur. Whether you installed it in a switchboard, panelboard, or motor control center, this breaker is designed to help keep electrical systems operating safely while reducing unnecessary downtime. Its Type LJA design makes it suitable for a variety of compatible power distribution applications, especially where a 400 Amp, 3-pole breaker is required.

Key Features and Benefits

• 400 Amp Continuous Current Rating: 400 Amp continuous current rating for demanding power distribution systems.
• 3-Pole Configuration: 3-pole configuration for three-phase electrical applications.
• 65 kA Interrupting Capacity: 65 kA interrupting capacity at 480 VAC helps protect equipment during high-fault-current events.
• Type LJA Molded Case Design: Type LJA molded case design for compatible commercial and industrial installations.
• Overcurrent Protection: Helps reduce the risk of damage caused by overloads and electrical faults.
• Replacement and Upgrade Applications: Suitable for replacement projects, system upgrades, and routine maintenance.
• Compact Dimensions: Compact dimensions make it easier to fit into compatible electrical equipment.

Technical Specifications

• Part Number: LJA36400U31X
• Type: LJA
• Poles: 3
• Amperage: 400 Amps
• Interrupting Rating: 65kA @ 480VAC
• Dimensions:
  • Height: 13.4 in.
  • Width: 5.5 in.
  • Depth: 4.3 in.

Material Compliance and Certifications

• Installation Requirements: The LJA36400U31X should be installed by qualified electrical professionals and used in accordance with applicable local and national electrical codes.
• Compliance Information: Compliance markings and certifications can vary based on the manufacturing date and production run. Always verify the product label and manufacturer documentation for information specific to the individual breaker.

Where It Works Best

• Commercial buildings
• Manufacturing facilities
• Industrial plants
• Power distribution switchboards
• Panelboards
• Motor control centers (MCCs)
• HVAC equipment
• Institutional and municipal facilities

When dependable circuit protection is essential, the LJA36400U31X delivers the electrical ratings needed for demanding three-phase systems. Its 400 Amp capacity, 3-pole configuration, and 65kA interrupting rating at 480VAC make it a solid fit for a wide range of commercial and industrial power distribution applications.