Square D HJA260304 - 30 A, 600 V, 2-Pole Plug-In Circuit Breaker | AmpState

The Square D HJA260304 is a 30A, 600V, 2-pole plug-in molded case circuit breaker designed to protect branch circuits in panelboards and load centers. Built for dependable overcurrent and short-circuit protection, it delivers precise, repeatable performance in demanding electrical environments.

• Fast plug-in connection: Streamlines installation and replacement, enabling quicker retrofits and reduced downtime during maintenance or upgrades.
• Thermal-magnetic trip unit: Delivers stable, repeatable protection across varying load conditions, helping to prevent nuisance trips while safeguarding wiring and equipment.
• OEM-compatible plug-in design: Engineered to snap into matching Square D load centers and panelboards, ensuring a secure electrical connection and reliable mechanical fit.
• Versatile 2-pole protection for 30A circuits: Ideal for residential, commercial, and light industrial applications where 2-pole 30A, 600V protection is required.

Technical snapshot

• Manufacturer: Square D
• Part Number: HJA260304
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 30A
• Voltage Rating: 600V
• Number of Poles: 2
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

This breaker is a practical upgrade or replacement choice for service panels and distribution centers where quick, reliable protection is essential. By pairing a robust thermal-magnetic trip with a straightforward plug-in installation, it reduces installation complexity and minimizes operational interruptions. Use it to safeguard feeders, branch circuits, or equipment in controlled environments, while maintaining compatibility with common Square D panelboard ecosystems.

Practical use scenarios include panelboard refresh projects, adding protected circuits to existing commercial or light industrial setups, and routine maintenance swaps where downtime must be kept to a minimum. For best results, verify a proper plug-in compatibility with your panelboard model and confirm that the circuit protection rating aligns with the connected load to maintain safe, compliant operation.