Square D HDA36040 - 40 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

The Square D HDA36040 is a 40A, 600V, 3-pole plug-in molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Its fast plug-in connection simplifies installation and makes replacements quick and clean, minimizing downtime during upgrades or service outages.

• Fast plug-in connection for quick installation and effortless field replacement, keeping your electrical system up and running with minimal downtime.
• Thermal-magnetic trip unit provides stable, repeatable protection across varying load conditions, safeguarding wiring and equipment from both overloads and short circuits.
• 3-pole configuration suited to three-phase circuits, ideal for commercial and light industrial panelboards and load centers.
• 600V and 40A rating designed for higher voltage applications while delivering precise current protection for your branch circuits.
• Plug-in molded case design ensures compatibility with matching OEM load centers and panelboards for seamless integration.
• Versatile application suitable for residential, commercial, and light industrial environments where reliable circuit protection is essential.

Technical specifications at a glance

• Manufacturer: Square D
• Part Number: HDA36040
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40A
• Voltage Rating: 600V
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Who should consider the Square D HDA36040? electricians, facilities engineers, and maintenance teams responsible for protecting electrical distribution in panelboards and load centers where three-phase power is used. It’s particularly advantageous when upgrading existing panels or expanding capacity in commercial and light industrial settings, where fast installation and reliable protection directly impact uptime and safety.

In practice, this 40A, 600V, 3-pole plug-in circuit breaker helps you:

• Prevent nuisance trips by relying on a trusted thermal-magnetic trip mechanism that responds precisely to overloads and short circuits.
• Minimize service interruptions with a plug-in design that supports rapid replacements and straightforward maintenance.
• Ensure compatibility and consistent performance within OEM-loaded panelboards and load centers for a cohesive electrical system.

For a dependable, industry-standard solution that pairs strong protection with practical serviceability, the Square D HDA36040 delivers clear, tangible value in any suitable panel environment. Add it to your electrical protection lineup and experience straightforward installation, reliable performance, and long-lasting protection for your critical circuits.