Square D HDA260404 - 40 A, 600 V, 2-Pole Plug-In Circuit Breaker | AmpState

Introducing the Square D HDA260404 — a 40A, 600V, 2-pole plug-in molded case circuit breaker from Square D, available through AmpState. This unit is purpose-built to deliver dependable branch-circuit overcurrent and short-circuit protection in panelboards and load centers, with a design that prioritizes speed, reliability, and easy servicing.

Fast, reliable protection with plug-in convenience

• Fast plug-in connection — quick installation and simple replacement that reduces panel downtime and minimizes service interruptions on job sites or maintenance calls.
• Thermal-magnetic trip unit — dual protection that responds to overloads with a stable, repeatable thermal trip and interrupts severe faults via magnetic trip for fast, decisive action.
• 2-pole, 40A, 600V rating — handles multi-wire circuits and high-voltage applications, safeguarding conductors and equipment up to 600V with up to 40 amps of continuous protection.
• OEM panelboard compatibility — designed to match Square D load centers and panelboards, ensuring coordinated protection and reliable operation within existing systems.
• Versatile for multiple environments — suitable for residential, commercial, and light industrial applications where dependable circuit protection and quick service are priorities.

Ideal use cases and practical scenarios

• Upgrading or expanding residential panels to provide dedicated 40A branch circuits for appliances or subpanels while maintaining a clean, plug-in integration.
• Commercial service panels needing a dependable, easily replaceable 2-pole breaker for feeders or critical circuits in offices, retail spaces, and light manufacturing.
• Light industrial control enclosures requiring robust overcurrent protection on 240V circuits with a straightforward plug-in installation.

Technical snapshot

• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 40A
• Voltage rating: 600V
• Number of poles: 2
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Whether you’re upgrading an existing panel, wiring a new commercial space, or stocking service vans for rapid replacements, the Square D HDA260404 delivers precise protection, easy installation, and enduring performance. Rely on its thermal-magnetic trip to consistently protect circuits from overloads and short circuits, while the plug-in design keeps maintenance efficient and downtime to a minimum. For professionals who value compatibility, reliability, and practical uptime, this 40A, 600V, 2-pole breaker is a clear choice for Square D panelboards and load centers.