Square D LJF36400U31X Molded Case Circuit Breaker – 400A – 3-Pole / 3-Phase – 600V – 65kA @ 480V – Bolt-On – PowerPact LJF Series

The Square D LJF36400U31X is a 400A, 3-pole, 3-phase molded case circuit breaker from the Square D / Schneider Electric PowerPact Type LJF Series. It features solid-state electronic protection with a non-interchangeable MicroLogic Standard 3.3 trip unit and Long-Time and Instantaneous (LI) trip functions.

The LJF36400U31X is rated for 600V and provides a 65kA interrupting rating at 480V. It features current-limiting construction, a bolt-on connection, and is identified as suitable for 2-pole applications. The breaker is supplied as a complete breaker, with lugs not included, and is UL Listed.

Specifications:

• Manufacturer: Square D / Schneider Electric
• Product Type: Molded Case Circuit Breaker
• Product Family: PowerPact
• Series: LJF
• Type: LJF
• Catalog No.: LJF36400U31X
• Current Rating: 400A
• Number of Poles: 3-Pole
• Phase: 3-Phase
• Voltage Rating: 600V
• Interrupting Rating: 65kA @ 480V
• Protection Type: Solid-State Electronic
• Trip Unit: MicroLogic Standard 3.3
• Trip Functions: Long-Time and Instantaneous (LI)
• Trip Type: Non-Interchangeable
• Current Limiting: Current Limiting
• Mounting / Connection: Bolt-On
• Breaker Configuration: Complete Breaker
• Lugs: Not Included
• 2-Pole Application: Suitable for 2-Pole Applications
• Application: Electrical Distribution and Overcurrent Protection
• Brand: Square D / Schneider Electric

Part Numbers & Identification:

• Manufacturer Part Number (MPN): LJF36400U31X
• Catalog Number: LJF36400U31X
• Model: LJF36400U31X
• Product Family: Square D PowerPact Molded Case Circuit Breakers
• Series: LJF
• Type: LJF
• Brand: Square D
• Manufacturer: Schneider Electric
• Product Type: Molded Case Circuit Breaker
• Breaker Configuration: 3-Pole, 400A
• Trip Unit: MicroLogic Standard 3.3
• Trip Configuration: Non-Interchangeable LI
• UPC:785901072720

Compatibility:

Designed for use with compatible Square D / Schneider Electric PowerPact LJF Series electrical distribution equipment that accepts LJF Series molded case circuit breakers. The LJF36400U31X provides 400A, 3-pole solid-state electronic protection for compatible 600V electrical distribution applications.

The breaker features current-limiting construction, a bolt-on connection, and a non-interchangeable MicroLogic Standard 3.3 trip unit. It is identified as suitable for 2-pole applications and is supplied without lugs. Always verify the specific panelboard or electrical equipment model, approved breaker configuration, system voltage, available fault current, trip-unit compatibility, lug selection, mounting arrangement, and installation requirements before installation.

Certifications:

• UL Listed
• PowerPact LJF Series
• 400A Rated
• 3-Pole / 3-Phase
• 600V Rated
• 65kA @ 480V Interrupting Rating
• Solid-State Electronic Protection
• MicroLogic Standard 3.3 Trip Unit
• Long-Time and Instantaneous (LI) Trip Functions
• Non-Interchangeable Trip
• Current Limiting
• Bolt-On Connection
• Suitable for 2-Pole Applications
• Complete Breaker
• Lugs Not Included

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