Square D MHL36900 - 900 A, 3-Pole Circuit Breaker | AmpState

The Square D MHL36900 is a high-capacity, 3-pole molded case circuit breaker designed for dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. With a compact profile, it helps you maximize panel space without compromising protection or performance.

Why the Square D MHL36900 stands out

Engineered as a thermal-magnetic unit, this 900A breaker delivers stable, repeatable protection across a range of operating conditions. The thermal element handles sustained overloads with precision, while the magnetic element rapidly trips on short circuits, helping minimize damage to equipment and wiring. Its rugged molded case construction is built to withstand everyday panel use in challenging environments.

Key specifications at a glance

• Manufacturer: Square D
• Part Number: MHL36900
• Type: Thermal-magnetic molded case circuit breaker (MCCB)
• Amperage Rating: 900A
• Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection in panelboards and loadcenters
• Compatibility: Designed for use with matching OEM loadcenters and panelboards

Ideal use cases

Perfect for residential, commercial, and light industrial installations where high-current protection is required without sacrificing space or compatibility. Whether upgrading a panel to accommodate higher demand, replacing a worn-out breaker, or configuring a new installation, the Square D MHL36900 provides reliable protection that installers and building owners can trust.

Compatibility and installation tips

• Pair this MCCB with compatible Square D OEM loadcenters and panelboards to ensure seamless mechanical fit and electrical performance.
• Verify your panel’s rating and bus configuration to confirm 900A, 3-pole protection is appropriate for the application.
• Follow manufacturer torque specifications for terminal connections to maintain a solid, long-term connection.
• Store and handle breakers in their original packaging until installed to prevent damage to sensitive trip components.

With the Square D MHL36900, you get a purpose-built solution that combines space-efficient design, precise protection, and dependable operation for demanding panel environments. It’s the smart choice when you need robust 900A, three-pole protection that integrates smoothly into your existing Square D infrastructure.