Square D LX36400 400A 3 Pole Molded Case Circuit Breaker – Plug In Mount – 600VAC

The LX36400 by Square D is a high-capacity LX (I-Line) molded case circuit breaker engineered for reliable overcurrent protection in industrial and commercial electrical distribution systems. This breaker features an electronic non-interchangeable trip unit with LSI (Long-Time, Short-Time, Instantaneous) protection functions, ensuring precise fault response and efficient coordination within power systems. Rated at 400 amperes and constructed on a 600 amp maximum frame platform, the breaker operates up to 600VAC and includes a factory-installed ARP100 rating plug. Its plug-in mounting configuration and standard load-end terminals provide efficient installation and dependable long-term performance.

Product Specifications

• Manufacturer: Square D
• Model Number: LX36400
• Product Type: Molded Case Circuit Breaker
• Frame Style: LX (I-Line)
• Mounting Type: Plug In
• Trip Unit Type: Electronic Non-Interchangeable
• Trip Functions: LSI (Long-Time, Short-Time, Instantaneous)
• Rated Current: 400 Ampere
• Number of Poles: 3 Pole
• Maximum Frame Capacity: 600 Amp
• Standard Lug Type: Load End
• Rating Plug Included: ARP100
• Warranty: 1 Year

Technical Specifications

• Calibrated for operation at 40°C ambient temperature
• Electronic trip system for accurate circuit protection
• Non-interchangeable trip unit construction
• Suitable for I-Line distribution systems
• High interrupting capacity performance
• Plug-in mounting for simplified installation
• Factory-installed load-end terminals
• Designed for commercial and industrial applications

Voltage and Ratings

• Maximum Operating Voltage: 600 VAC
• Interrupting Rating at 240 VAC: 100 kA
• Interrupting Rating at 480 VAC: 65 kA
• Interrupting Rating at 600 VAC: 35 kA
• Frequency Rating: 50/60 Hz
• Current Rating: 400 Ampere

Product Data

• Brand: Square D
• Series: LX (I-Line)
• Model: LX36400
• Frame Type: L Frame
• Connection Type: Plug In
• Pole Configuration: 3 Pole
• Protection Type: LSI Electronic Trip
• Included Accessory: ARP100 Rating Plug
• Application: Circuit protection and power distribution

Important Note

The product image shown is for identification purposes only and may not represent the exact breaker configuration supplied. Accessories purchased together with the breaker can be professionally installed according to customer requirements at no additional cost. This breaker is backed by a one-year in-house warranty covering shipping, repairs, labor, and replacement parts necessary for recertification. Warranty coverage excludes damage caused by misuse, improper installation, mishandling, or normal operational wear and tear.

Returns are easy

You may return items within 30 days of delivery for a refund.

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