Square D MHL364001212 400A 3-Pole 600 V Circuit Breaker

Meet the Square D MHL364001212 400A 3-Pole 600 V Circuit Breaker — a purpose-built protective device from Square D’s MHL-series molded-case breakers. This exact part (MHL364001212) delivers a robust 400 A current rating, with three poles and a 600 V maximum rating, making it a reliable choice for demanding three-phase power distribution in industrial settings.

Why this breaker stands out

• High-current protection: 400 A rating designed to guard heavy feeders and motors while minimizing nuisance trips in busy electrical panels.
• Three-pole design: Simultaneous disconnection of all three phases for safe shutdown in three-phase systems and enhanced protection for multi‑branch circuits.
• 600 V rating: Suitable for typical industrial voltage levels, supporting a wide range of equipment and applications.
• Trusted brand lineage: Part of Square D’s MHL-series, recognized for dependable protection in commercial and industrial environments.
• Exact replacement part: Identified by part number MHL364001212, ensuring precise compatibility when upgrading or replacing existing protection.

Ideal applications

• Upgrading or replacing a main feeder or distribution breaker in three-phase industrial panels and switchgear.
• Protecting large motors, conveyors, pumps, and other high‑current loads in manufacturing, processing, or heavy equipment facilities.
• Systems operating up to 600 V that require reliable, discrete protection for multi‑phase circuits.

Installation and compatibility tips

• Confirm that your enclosure accepts MHL-series molded-case breakers and that the panel labeling supports a 3‑pole, 400 A, 600 V device.
• When replacing, power down the system and follow the panel manufacturer’s torque and installation guidelines to ensure a secure, safe connection.
• This part is specifically identified as MHL364001212—useful for precise replacements in systems designed around Square D protection schemes.

Choosing the Square D MHL364001212 means selecting a dependable, high‑capacity protection solution for demanding electrical environments. With its 400 A current rating, 3‑pole configuration, and 600 V rating, this breaker provides clear, reliable protection for critical industrial tasks and distributed three‑phase power, helping you safeguard equipment and maintain uptime.