Square D HJA36150U33X - 150 A, 3-Pole Plug-In Circuit Breaker | AmpState

Square D HJA36150U33X is a 150 A, 3-pole plug-in molded case circuit breaker designed for dependable branch-circuit overcurrent and short-circuit protection in panelboards and load centers. Built to integrate seamlessly with matching OEM load centers, this unit delivers fast installation and reliable protection where it matters most—future-proofing electrical systems in homes, businesses, and light industrial environments.

• Fast plug-in connection for quick installation and straightforward field replacement, minimizing panel downtime during servicing or upgrades.
• Thermal-magnetic trip unit delivers stable, repeatable protection. The thermal element handles gradual overloads, while the magnetic element provides instantaneous response to short circuits, helping prevent damage to wiring and equipment.
• 3-pole configuration ideal for three-phase systems and multi-wire branch circuits common in commercial and light industrial settings.
• 150 A rating provides solid protection for large feeders and service entrances while coordinating with adjacent protection devices in multi-breaker panels.
• Plug-in mounting design simplifies installation, inspection, and replacement without the need for a full panel rework.
• OEM compatibility engineered to fit and work with matching Square D panelboards and load centers, helping maintain system coordination and trip characteristics.
• Versatile applications suitable for residential, commercial, and light industrial electrical distributions where reliable short-circuit protection and convenient maintenance are priorities.

This breaker answers common questions about reliability and compatibility: Will it fit my panel? Will it trip consistently under fault conditions? Is it suitable for three-phase feeders? With the HJA36150U33X, you get precise trip performance, a plug-in installation process, and confirmed compatibility with Square D OEM panels, making it a trusted choice for ongoing electrical protection.

Technical snapshot

• Manufacturer: Square D
• Part Number: HJA36150U33X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 150 A
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Ideal for electricians, facilities managers, and maintenance teams seeking a dependable, easy-to-service protection device, the Square D HJA36150U33X combines robust fault protection with straightforward replacement in a compact, plug-in format. Invest in a breaker that supports predictable performance, simplified upgrades, and durable protection for your electrical distribution system.