Square D HJL36020AA - 20 A, 600 V, 3-Pole Circuit Breaker | AmpState

Designed for reliable branch circuit protection, the Square D HJL36020AA is a 20A, 600V, 3-pole molded case circuit breaker engineered to guard panelboards and loadcenters from overcurrent and short-circuit events. Its robust construction and precise trip mechanism provide dependable safety across residential, commercial, and light industrial applications.

Why this breaker stands out

• Compact molded case design maximizes panel space and simplifies wiring, making it easier to fit into tighter electrical enclosures without sacrificing performance.
• Thermal-magnetic trip unit delivers stable, repeatable protection across temperature and load conditions, reducing nuisance trips and helping protect connected equipment.
• Three-pole configuration ensures simultaneous interruption on all conductors, ideal for three-phase circuits and shared-neutral setups where coordinated protection matters.
• 600V insulation rating supports a wide range of commercial and light industrial distributions, including motor and control circuit feeders up to 600V.
• 1:1 compatibility with matching OEM loadcenters and panelboards for straightforward installation and reliable electrical coordination without panel modifications.

Ideal use cases and who benefits

Perfect for installers and facility managers seeking a dependable, easy-to-replace protection solution in distribution panels. Use this 3-pole breaker to:

• Upgrade aging or mismatched breakers in commercial panels to restore precise overcurrent protection.
• Implement in residential-commercial mixed-use panels where 3-pole protection is required for multi-wire branch circuits or specific load centers.

Technical specifications

• Manufacturer: Square D
• Part number: HJL36020AA
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 20A
• Voltage rating: 600V
• Number of poles: 3
• Application: Branch circuit overcurrent and short-circuit protection in panelboards and loadcenters

When you choose the HJL36020AA, you’re selecting a trusted component designed to fit seamlessly into Square D systems, delivering predictable protection and long-term reliability for a wide range of electrical installations.