Square D | MGP36400 | Circuit Breaker | 400A | 3-Pole | 600V

Meet the Square D MGP36400 Circuit Breaker—a rugged solution for demanding 3‑phase power systems. With a 400A rating, 3 poles, and a 600V operating capability, this unit is purpose-built for maintenance, retrofit, and replacement projects where exact specifications matter. The MGP36400 is the right choice when you need dependable protection that keeps industrial and commercial electrical distribution running smoothly.

The MGP36400 is part of the Square D MGP lineup, designed to integrate with compatible panels and distribution gear with minimal modification. Before you order, verify fit and ratings to ensure seamless compatibility—the part number (MGP36400) is the clearest reference for matching exact equipment.

• 400 A current rating provides strong protection for heavy feeder cables and main distribution paths.
• 3-pole configuration safeguards all three phases in a 3‑phase 600V system, helping maintain balance and reliability.
• 600V operating voltage supports industrial and commercial electrical environments where higher voltage distribution is standard.
• Thermal-magnetic protection delivers precise overcurrent response, helping prevent damage from overloads and short circuits.
• Retrofit-friendly design and standard mounting/connectivity simplify replacement in existing Square D installations.
• Clear compatibility reference—confirm fit and ratings using the MGP36400 part number to avoid mismatches in panels and distribution gear.

Ideal use cases

• Upgrading or replacing main feeders in industrial facilities with 3‑phase 600V systems.
• Retrofits and maintenance projects where exact 400A, 3-pole, 600V specifications are required.
• New or upgraded commercial electrical rooms that rely on reliable, standardized Square D protection.

Why choose the MGP36400 for your electrical protection needs

Choosing a breaker from the Square D MGP family means you’re prioritizing consistency, reliability, and long-term availability. This unit is designed to plug into compatible panels with the same mounting footprint and connection scheme, reducing installation time and rework. With the MGP36400, you’re investing in precise protection for high-load feeders and critical equipment, helping you minimize downtime and protect valuable assets.

Notes: Always confirm fit and ratings before ordering. The part number is the best reference for compatibility, ensuring that your 400A, 3‑pole, 600V circuit breaker integrates smoothly with your existing Square D installation.