Square D | MHL368001426 | Circuit Breaker | 800A | 3-Pole | 600V

Engineered for demanding electrical systems, the Square D MHL368001426 circuit breaker delivers dependable overcurrent protection for 3-phase networks up to 600 volts. With an 800-amp rating and a three-pole configuration, this device is built for high-load environments where precise protection and rapid response are critical.

Part of the Square D family, this breaker is best referenced by its part number MHL368001426, ensuring compatibility for maintenance, retrofit, and replacement projects that require exact specifications. Before you order, confirm fit and ratings against your panel’s requirements—the part number is the clearest compatibility signal.

What makes this model unique

• High-current protection for 3-phase systems: 800A capacity safeguards large loads and minimizes nuisance trips during surge events.
• Three-pole design for balanced distribution: Coordinated protection across all three hot legs in a 3-phase setup.
• 600V rating for industrial environments: Suitable for commercial electrical rooms, service panels, and equipment distributions operating up to 600 volts.
• OEM reliability: Square D ensures compatibility with compatible panels and upstream protective devices, reducing mismatch risk during retrofits.

Ideal use cases include:

• Maintenance projects to replace aging or failed circuit breakers in 3-phase panels
• Retrofit or upgrade projects to bring systems up to current protection standards
• Replacement in legacy installations where the performance and trip characteristics match existing specifications

Practical guidance for installation and compatibility:

• Always confirm fit and ratings before ordering; the MHL368001426 part number is the most reliable reference for compatibility.
• Verify your panel's amperage rating, number of poles, and maximum operating voltage align with 800A, 3-pole, and 600V respectively.
• Plan for proper mounting, wiring terminals, and secure enclosure clearance to maintain safe operation and compliant installations.

Choosing this Square D circuit breaker provides a dependable, OEM-grade solution that aligns with existing protection schemes and reduces the risk of mismatch in critical power distribution. Whether you’re performing routine maintenance, executing a retrofit, or replacing a failed unit, this 800A, 3-pole, 600V breaker is designed to keep your system protected and downtime to a minimum.