Square D HJL36045 - 45 A, 600 V, 3-Pole Circuit Breaker | AmpState

Meet the Square D HJL36045 — a 45A, 600V, 3-pole molded-case circuit breaker built for dependable branch-circuit protection in panelboards and load centers. Designed to fit seamlessly into residential, commercial, and light industrial electrical systems, it delivers precise protection where it matters most.

• Space-efficient molded-case design minimizes panel footprint while maximizing transportable, modular protection in crowded panels.
• Thermal-magnetic trip unit combines a sensitive thermal element for overloads with an instantaneous magnetic trip for short circuits, delivering stable, repeatable protection across temperature variations and fault scenarios.
• OEM-ready compatibility ensures reliable integration with matching Square D load centers and panelboards for consistent performance and straightforward retrofits.
• 3-pole configuration supports 3-phase circuits with a common-trip mechanism, ensuring synchronized disconnection across all poles for safer equipment protection.
• Versatile for diverse environments designed to protect circuits in residential, commercial, and light industrial installations that demand dependable overcurrent and short-circuit protection at up to 600V.

Technical snapshot

• Manufacturer: Square D
• Part Number: HJL36045
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 45A
• Voltage Rating: 600V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

Use the Square D HJL36045 to protect branch circuits feeding lighting, outlets, HVAC equipment, pumps, and other motor-driven loads in panelboards and load centers. It’s an excellent replacement for aging or undersized breakers in three-phase systems, helping maintain safety, reduce nuisance trips, and simplify panel maintenance. Its 3-pole design makes it well-suited for small commercial spaces, retail environments, and light industrial setups where reliable, common-trip protection is essential.

Why this breaker stands out

• Engineered for reliability in real-world panel environments, with a compact design that preserves valuable enclosure space.
• Precise trip characteristics that respond quickly to short circuits while avoiding unnecessary shutdowns during minor overloads.
• Consistent performance across a range of applications thanks to a robust thermal-magnetic mechanism and proven compatibility with Square D panel products.
• Clear, durable labeling and a straightforward installation path that helps electricians confidently select the right protection for each circuit.

Powered by Square D, the HJL36045 is available through AmpState as a genuine, ready-to-install solution for your electrical protection needs. If you’re upgrading panels, stocking service stock, or replacing a failed 3-pole breaker, this 45A, 600V molded-case breaker delivers trusted safety, dependable operation, and seamless integration with compatible panel systems.