Square D MGA36450 - 450 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

Square D MGA36450 is a high-capacity, plug-in molded case circuit breaker engineered to safeguard your electrical distribution in panelboards and load centers. With a robust 450 A rating at up to 600 V and a 3-pole configuration, this device delivers dependable branch circuit overcurrent and short-circuit protection for demanding residential, commercial, and light industrial environments. The fast plug-in connection makes installation and future replacement quick and straightforward, helping you minimize downtime and keep critical circuits protected.

• Fast plug-in connection for quick installation and easy replacement, reducing service time during upgrades or maintenance.
• Thermal-magnetic trip unit provides stable, repeatable protection by reliably responding to overcurrent and short-circuit conditions across varying loads and temperatures.
• 3-pole design suited for three-phase circuits, delivering solid protection for larger loads and equipment fed from three-phase systems.
• 450 A amperage rating handles heavy branch circuits without compromising protection or performance.
• 600 V voltage rating supports medium-voltage distribution in compliant panelboards and load centers.
• OEM-compatible works with matching Square D OEM load centers and panelboards for seamless integration.
• Versatile applications ideal for residential, commercial, and light industrial installations requiring reliable, scalable protection.

Technical specifications

• Manufacturer: Square D
• Part Number: MGA36450
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 450 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios and benefits

In residential settings, the MGA36450 is a robust solution for feeders and large branch circuits that demand reliable protection without sacrificing serviceability. In commercial environments, it supports panels that feed lighting, HVAC, and critical equipment, providing a clear protection boundary for three-phase loads. For light industrial facilities, it offers a scalable, plug-in option that can accommodate evolving electrical distribution needs while maintaining fast, straightforward replacement when upgrades or servicing are required.

Why choose this model? Its combination of high amperage, solid thermal-magnetic protection, and plug-in convenience translates to less downtime, easier maintenance, and a dependable safety margin for your distribution network. Pair it with a compatible OEM load center, and you gain a cohesive, streamlined protection solution designed to perform reliably in real-world operating conditions.