Square D HJL36125 - 125 A, 600 V, 3-Pole Circuit Breaker | AmpState

Meet the Square D HJL36125—a 125 A, 600 V, 3-pole molded case circuit breaker designed to deliver dependable branch-circuit protection in panelboards and load centers. Built to survive the rigors of daily operation, this breaker combines compact form with robust protection, making it a smart choice for commercial, residential, and light industrial installations.

Key Features

• Compact molded case design maximizes panel space and simplifies installation in tight electrical panels.
• Thermal-magnetic trip unit provides stable, repeatable protection by combining overload sensing with fast magnetic short-circuit protection.
• 3-pole configuration ideal for 3-phase circuits and balanced load distribution in commercial or light industrial environments.
• 125 A rating and 600 V rating suited for medium-duty branch circuits requiring reliable oversight and quick interruption when faults occur.
• OEM panel compatibility designed to work seamlessly with matching Square D panelboards and loadcenters for straightforward replacement or upgrade.

Why It Matters

In any electrical distribution setup, precise protection matters. The HJL36125’s thermal-magnetic design reduces nuisance trips while ensuring swift cutoff on genuine faults, safeguarding wiring, devices, and personnel. Its 3-pole construction supports coordinated protection for multi-phase systems, helping you maintain stable power delivery in crowded panels or control centers.

Ideal Use Cases

• Upgrading or replacing breakers in Square D panelboards and loadcenters where a reliable 3-pole, 125 A solution is required.
• Commercial and light industrial panels that run 3-phase equipment and demand consistent protection against overcurrent and short circuits.
• Residential-commercial hybrids where space is at a premium and OEM compatibility matters for maintenance and stocking spare parts.

Technical Specifications

• Manufacturer: Square D
• Part Number: HJL36125
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 125 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Available from AmpState, this Square D HJL36125 breaker is a purpose-built solution for reliable protection in panelboard configurations. Its combination of space efficiency, precise trip performance, and OEM compatibility makes it a practical, long-lasting choice for professionals seeking dependable electrical safety and straightforward maintenance.