Square D BDA160403 - 40 A, 1-Pole Plug-In Circuit Breaker | AmpState

The Square D BDA160403 is a 40 A, 1-pole plug-in molded case circuit breaker built to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Designed for reliability in everyday electrical systems, it plugs directly into compatible Square D panels for fast, streamlined service and reduced downtime.

• Fast plug-in connection: Quickly install or replace the breaker without complex wiring steps, helping you get systems back up and running with minimal interruption.
• Thermal-magnetic trip unit: Combines precise thermal protection with magnetic short-circuit detection to deliver stable, repeatable protection performance across a range of operating conditions.
• OEM-compatible: Engineered to fit and perform with matching Square D load centers and panelboards, ensuring reliable coordination within your electrical distribution system.
• Versatile for multiple environments: Suitable for residential, commercial, and light industrial applications where solid, fast-acting circuit protection is essential.

Key benefits and real-world value

• Reduces downtime: The plug-in design minimizes installation time and makes replacements straightforward during maintenance or upgrades.
• Predictable protection: The thermal-magnetic mechanism provides immediate response to short circuits while limiting nuisance trips during normal inrush conditions.
• System compatibility: Built to integrate smoothly with standard Square D panelboards and loadcenters, helping you maintain proper breaker coordination and labeling accuracy.

Ideal use cases

• Residential service panels and subpanels needing reliable branch circuit protection for lighting, outlets, and small-appliance circuits.
• Commercial light-duty electrical systems where quick replacement and dependable protection are priorities.
• Light industrial applications that require a robust plug-in solution with precise overcurrent control.

Specifications at a glance

• Manufacturer: Square D
• Part Number: BDA160403
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40 A
• Number of Poles: 1
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Practical tips for optimum performance

• Verify panel compatibility before installation to ensure a secure plug-in fit and proper trip coordination with adjacent breakers.
• Plan for easy future maintenance by clearly labeling circuits protected by the BDA160403 and keeping spare units on hand for quick swaps.
• Keep within rated ampacity and avoid loading circuits beyond their designed capacity to maintain consistent protection and prevent nuisance trips.

Whether you’re updating an aging panel, performing a panelboard upgrade, or outfitting a new installation, the Square D BDA160403 40 A 1-pole plug-in circuit breaker offers precise protection, rapid installation, and dependable performance across residential, commercial, and light industrial applications. Trust AmpState to provide genuine Square D replacements that keep your electrical systems safe, compliant, and operating at their best.