Square D LX36400G 400A 3 Pole Molded Case Circuit Breaker – Plug In Mount – 600VAC

The LX36400G by Square D is a high-performance LX (I-Line) molded case circuit breaker engineered for advanced circuit protection in industrial and commercial electrical distribution systems. Equipped with an electronic non-interchangeable trip unit featuring LSIG (Long-Time, Short-Time, Instantaneous, Ground Fault) protection functions, this breaker delivers precise fault response, selective coordination, and enhanced ground fault protection. Rated at 400 amperes and built on a 600 amp maximum frame platform, the breaker operates at up to 600VAC and includes a factory-installed ARP100 rating plug. Its plug-in mounting configuration and standard load-end terminals ensure efficient installation and dependable long-term operation.

Product Specifications

• Manufacturer: Square D
• Model Number: LX36400G
• Product Type: Molded Case Circuit Breaker
• Frame Style: LX (I-Line)
• Mounting Type: Plug In
• Trip Unit Type: Electronic Non-Interchangeable
• Trip Functions: LSIG (Long-Time, Short-Time, Instantaneous, Ground Fault)
• 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 protection system for accurate fault response
• Integrated ground fault protection capability
• Non-interchangeable trip unit construction
• Designed for I-Line electrical distribution systems
• Plug-in mounting configuration for simplified installation
• High interrupting capacity performance
• Factory-installed load-end terminals

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: LX36400G
• Frame Type: L Frame
• Connection Type: Plug In
• Pole Configuration: 3 Pole
• Protection Type: LSIG Electronic Trip
• Included Accessory: ARP100 Rating Plug
• Application: Industrial and commercial circuit protection

Important Note

The product image displayed is for identification purposes only and may not represent the exact breaker supplied. Accessories ordered together with the breaker can be professionally installed according to customer-specific requirements at no additional charge. This breaker includes a one-year in-house warranty covering shipping, repairs, labor, and replacement parts required 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.

FREE Shipping on orders over $149.

My Circuit Breakers offers one to five day delivery in the United States. The variation depends on the chosen shipping speed and the warehouse location for the product(s).

Same Day Shipping

We strive to ship out your items within one business day.

In rare circumstances, My Circuit Breakers may reserve up to 5 business days to complete shipment. Feel free to contact us if your order is time sensitive.

My Circuit Breakers provides a comprehensive 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer). Extended warranties are available upon request.