Square D | LAF3640036MV1027 | Circuit Breaker | 400A | 3-Pole | 600V

Engineered by Square D, the LAF3640036MV1027 Circuit Breaker delivers dependable 400-amp, 3-pole protection for 600-volt systems. This unit is built for maintenance, retrofit, and replacement projects where exact compatibility matters, so you can upgrade or restore your electrical distribution with confidence.

Key specifications

• Amperage: 400A
• Poles: 3-Pole
• Voltage: 600V
• Part number: LAF3640036MV1027
• Brand: Square D

What sets this breaker apart

• Exact compatibility: The part number LAF3640036MV1027 is the most reliable reference for matching breakers to your Square D panels and distribution assemblies, minimizing guesswork during replacements.
• clear suitability for 600V, 3-phase systems: Designed to protect and control circuits in commercial and industrial environments where three-phase power is standard.
• Reliable maintenance and retrofits: Ideal for updating aging panels or outfitting new equipment in facilities that require a precise 400A, 3-pole solution.

Ideal use cases

• Replacing a failed 3-pole breaker in 600V, 3-phase electrical systems within manufacturing or processing facilities.
• Retrofit projects where existing panels expect the LAF3640036MV1027 form factor and rating.
• Maintenance shutdowns that require a fast, compatible swap to restore power safely and efficiently.

Fit and compatibility guidance

Before ordering, confirm fit and ratings against your panel documentation. The LAF3640036MV1027 part number is the best reference for compatibility, ensuring you don’t encounter fit issues or rating mismatches during replacement or upgrade.

Practical tips for installation and care

• Power down the main supply and follow proper lockout/tagout procedures before servicing any circuit breaker.
• Verify conductor sizing and torque specifications align with your panel’s requirements and the breaker's terminals.
• Store and handle breakers in clean, dry conditions to preserve performance and longevity.