Square D HJA36030 - 30 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

Square D HJA36030 30A, 600V, 3-Pole Plug-In Molded-Case Circuit Breaker from AmpState delivers dependable branch circuit protection for panelboards and load centers. Designed for fast, tool-free installation and robust trip performance, this unit is built to keep residential, commercial, and light industrial electrical systems safe and up to code.

• Fast plug-in connection: Quick installation and easy replacement in compatible panels, minimizing downtime during service or upgrades.
• Thermal-magnetic trip unit: Stable, repeatable protection that combines thermal overload sensing with instantaneous magnetic response for short circuits.
• 3-pole design for 3-phase needs: Ideal for commercial or light industrial panelboards and load centers that require three‑phase protection up to 600V.
• OEM-compatible: Engineered to fit with matching Square D OEM load centers and panelboards, ensuring proper fit, alignment, and reliable operation.
• Specific ratings and compatibility: 30A, 600V, molded-case, plug-in mounting — a precise choice for branch circuit overcurrent and short‑circuit protection.

Technical specifications

• Manufacturer: Square D
• Part Number: HJA36030
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 30A
• Voltage Rating: 600V
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

This breaker is a practical, high-reliability solution for projects ranging from panelboard refreshes in service rooms to new-build commercial spaces. If you’re upgrading an aging distribution panel or stocking spare parts for field service, the HJA36030’s plug-in design and thermal-magnetic protection give you predictable performance when it matters most.

Why choose this 3‑pole plug-in breaker

• Minimizes installation time with a straightforward plug-in connection designed for compatible Square D panelboards.
• Delivers dual-mode protection—thermal for sustained loading, magnetic for fast response to short circuits—helping protect wiring, devices, and motors from damage.
• Offers clean compatibility with OEM panels, so you don’t have to modify or adapt panels to fit the breaker.

Practical tips and usage notes

• Use in panelboards and load centers that specify a matching 3-pole, 600V plug-in molded-case breaker from Square D.
• Plan replacements or upgrades around 30A branch circuits that require reliable protection without frequent nuisance trips.
• Always have a qualified electrician perform installation and ensure the panel’s labeling and NEC requirements are satisfied.
• Store spare units in a clean, dry environment to preserve the integrity of the thermal-magnetic trip mechanism for long-term reliability.