Square D HJA36015 - 15 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D HJA36015—a reliable 15A, 600V, 3-pole plug-in molded case circuit breaker built to safeguard panelboards and load centers from overcurrent and short-circuit events. When protection matters, this unit delivers precise, dependable performance in demanding electrical environments.

• Fast plug-in connection for quick installation and simple replacement, reducing panel downtime and service interruptions.
• Thermal-magnetic trip unit provides stable, repeatable protection across a range of loads and temperatures, helping prevent nuisance trips while ensuring safety.
• OEM-compatible design engineered to work with matching Square D load centers and panelboards for seamless integration and reliable operation.
• Three-pole configuration ideal for balanced protection on 3-phase circuits found in commercial and light industrial applications.

Technical snapshot

• Manufacturer: Square D
• Part Number: HJA36015
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 15A
• Voltage Rating: 600V
• Number of Poles: 3
• Mounting Style: Plug-in
• Applications: Branch circuit overcurrent and short-circuit protection

This breaker is an excellent choice for upgrading or rebuilding panels where quick replacement and dependable protection are priorities. It’s well-suited for residential projects that require robust branch-circuit protection, as well as commercial and light industrial setups that demand reliable 3-phase protection and easy serviceability.

Use cases and ideal scenarios

• Replacing a failed breaker in existing panelboards while maintaining OEM compatibility.
• Providing protection for 3-phase distribution in small-to-medium commercial installations.
• Upgrading aging electrical panels to a plug-in solution that simplifies future maintenance.
• Situations where quick, tool-free plug-in installation minimizes downtime during panel servicing.

Why choose this Square D breaker—beyond the basics, it combines fast, secure plug-in installation with a thermally assisted magnetic trip that adapts to changing load conditions. The 3-pole design supports balanced protection for 3-phase systems, while the 600V rating broadens its applicability to higher-voltage branch circuits often encountered in non-residential settings. For professionals prioritizing compatibility, speed, and consistent protection, this HJA36015 delivers.

Note: For safe and compliant installation, ensure the panelboard is compatible with the Square D HJA3640-series family and follow all local electrical codes. If you’re unsure about panel compatibility or proper installation practices, consult a licensed electrician.