Square D MH36500 - 500 A, 3-Pole Plug-In Circuit Breaker | AmpState

Introducing the Square D MH36500 — a 500 A, 3-pole plug-in molded case circuit breaker designed to shield panelboards and load centers from overcurrent and short circuits. Built for dependable branch circuit protection, it accelerates installation and simplifies maintenance with a fast plug-in connection, a thermal-magnetic trip unit, and seamless compatibility with matching OEM load centers.

Why this MH36500 stands out

• Fast plug-in connection — snag-free installation and quick replacement, minimizing panel downtime during upgrades or service calls.
• Thermal-magnetic trip unit — delivers stable, repeatable protection by combining long-term overload protection with instantaneous magnetic trip for short circuits.
• OEM load center compatibility — engineered to fit and perform reliably with matching Square D panels, reducing fitment risk and ensuring consistent operation.
• High-current capability — 500 A rating suitable for large feeders and demanding three-phase circuits in commercial or light industrial settings.
• Three-pole design — ideal for 3-phase distributions, providing balanced protection across all conductors in the system.
• Plug-in mounting — straightforward installation within existing panelboards and load centers, making replacements faster and cleaner.

Where and how you’ll use it

Designed for a range of environments, the MH36500 is a practical choice for residential, commercial, and light industrial applications that require robust protection for large branch circuits. Use it as a main or feeder protection device in panelboards and load centers, or as a high-current replacement in aging installations where a plug-in, molded case breaker is a fit.

Technical specifications at a glance

• Manufacturer: Square D
• Part Number: MH36500
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 500 A
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Practical benefits and usage tips

With the MH36500, you’ll enjoy reliable protection for demanding electrical loads while keeping installation practical for technicians. Its 3-pole configuration supports balanced 3-phase systems, helping minimize voltage imbalances and protect equipment across all phases. When planning upgrades or replacements, verify that your panelboard is compatible with this plug-in design and that the 500 A rating aligns with your load calculations. Regular inspection of the breaker’s terminal connections and visual checks for signs of wear during routine panel maintenance help ensure long-term reliability.

Ideal for professionals and facilities managers

Electricians and facility teams responsible for panel upkeep will appreciate the ease of replacement and the confidence of compatible, OEM-grade components. The Square D MH36500 combines proven protection technology with straightforward installation, reducing downtime and simplifying inventory with a single, high-capacity solution for 3-phase circuits.

Note: This description reflects the product’s official capabilities and intended applications. For best results, install only in panels designed for plug-in molded case breakers of this type and rating, and follow all applicable electrical codes and safety protocols.