Square D HJL36150M74 - 150 A, 600 V, 3-Pole Circuit Breaker | AmpState

Square D HJL36150M74 is a 150 A, 600 V, 3-pole molded case circuit breaker built to shield panelboards and load centers from overcurrent and short-circuit events. With a compact form factor and a thermal-magnetic trip unit, it delivers dependable protection without sacrificing valuable panel space.

Why this MCCB stands out

• Efficient panel space usage: A compact molded-case design fits neatly into standard panels, helping you maximize available space without compromising protection.
• Reliable protection for demanding circuits: The thermal-magnetic trip unit provides stable, repeatable response to overloads and short circuits across varying loads and temperatures.
• Seamless OEM compatibility: Designed to be used with matching Square D OEM load centers and panelboards, simplifying installation and maintenance.
• Versatile across settings: Suitable for residential, commercial, and light industrial applications where robust branch-circuit protection is essential.

Technical snapshot

• Manufacturer: Square D
• Part Number: HJL36150M74
• Type: Thermal-magnetic molded case circuit breaker
• Amperage: 150 A
• Voltage: 600 V
• Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

Use the Square D HJL36150M74 as main or feeder protection in 3-phase panelboards and load centers. It’s well-suited for new commercial installations, upgrades in light industrial panels, or residential environments requiring higher-current, three-pole protection. The 600 V rating accommodates a broad range of distribution schemes, while the 3-pole design ensures balanced protection for three-phase systems.

Installation and care tips

Install only in compatible Square D OEM panels and follow standard electrical codes. Verify terminal torque per manufacturer guidelines and perform routine checks for signs of wear or overheating. This device is designed for dependable, long-term protection, making it a solid choice where panel space, consistent trip performance, and compatibility matter most.