Square D HJL36150U33X - 150 A, 600 V, 3-Pole Circuit Breaker | AmpState

Square D HJL36150U33X is a 150 A, 600 V, 3-pole molded case circuit breaker engineered to deliver reliable branch circuit overcurrent and short-circuit protection for panelboards and loadcenters. Designed to fit seamlessly with matching OEM Square D load centers and panelboards, this unit helps you maintain consistent protection across your electrical system.

What makes it unique

• Compact molded case design minimizes footprint and maximizes panel space, letting you allocate more circuits without compromising protection.
• Thermal-magnetic trip unit provides stable, repeatable protection with precisely coordinated thermal and magnetic actions—thermal for sustained overcurrent, magnetic for instantaneous response to faults.
• Three-pole configuration ensures balanced protection across all hot legs, critical for 3-phase circuits and equipment that requires synchronized shutdown.
• OEM-compatible performance delivers reliable operation within Square D loadcenters and panelboards, with predictable trip characteristics and easy cross-compatibility in existing installations.
• Versatile applications suitable for residential, commercial, and light industrial environments where dependable circuit protection is essential.

Technical snapshot

• Manufacturer: Square D
• Part Number: HJL36150U33X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 150 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Practical usage and tips

Install this breaker in compatible panelboards or loadcenters to protect branch circuits from overloads and faults. For retrofits or replacements, the HJL36150U33X maintains the same trip characteristics and physical fit, easing field installation and panel coordination. In new installations, verify panel compatibility and bus configuration to ensure alignment of trip curves with connected loads and anticipated fault currents. This 3-pole unit is ideal for protecting multi-line circuits in residential subpanels, commercial service panels, and light industrial panels where dependable, coordinated protection matters.