Square D BDA34040Y - 40 A, 480 V, 3-Pole Plug-In Circuit Breaker | AmpState

Experience dependable, fast-acting protection with the Square D BDA34040Y—an essential 40A, 480V, 3-pole plug-in molded case circuit breaker designed for panelboards and load centers. Built to keep critical circuits safe, it delivers predictable performance in everyday commercial, residential, and light industrial settings.

Designed for real-world use, this breaker combines a fast plug-in connection with a thermal-magnetic trip unit. That means quick installation or replacement with a protection system that responds reliably to overloads and short circuits, reducing downtime and protecting both equipment and people.

Key differentiators

• Fast plug-in connection—simplifies installation and makes replacements straightforward, minimizing panel downtime.
• Thermal-magnetic trip unit—delivers stable, repeatable protection across varying loads and fault conditions.
• OEM load center compatibility—designed to integrate seamlessly with matching Square D panelboards and load centers for a trusted fit.
• 3-pole, 480V protection—protects three-phase circuits common in commercial and light industrial environments.
• 40A rating—provides balanced protection for mid-range branch circuits while supporting efficient system operation.
• Molded case construction—robust, durable protection suitable for demanding installation environments.

Technical specifications at a glance

• Manufacturer: Square D
• Part Number: BDA34040Y
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 40A
• Voltage rating: 480V
• Number of poles: 3
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

This plug-in breaker is ideal for facilities that rely on reliable three-phase protection and quick serviceability—perfect for electricians upgrading panels, stocking replacement parts, or specifying safe, compliant branch-circuit protection in commercial and light industrial projects. By pairing precise thermal-magnetic protection with industry-standard compatibility, the Square D BDA34040Y helps you keep power safe, systems running smoothly, and downtime to a minimum.