Square D BDA34020Y - 20 A, 480 V, 3-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D BDA34020Y—a 20-amp, 480-volt, three-pole plug-in molded case circuit breaker crafted to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Designed for fast service and enduring performance, this unit is a reliable cornerstone for commercial, light industrial, and residential‑scale electrical systems.

Why this breaker stands out

• Rapid plug-in connection: A straightforward plug-in mounting style minimizes downtime during installation or replacement, making upgrades and service fast and straightforward.
• Thermal-magnetic trip unit: Combines precise thermal protection with instantaneous magnetic trip for robust, repeatable protection against both sustained overloads and high‑energy short circuits.
• OEM‑grade compatibility: Specifically designed to be compatible with matching Square D OEM load centers and panelboards, ensuring a seamless fit and reliable coordination with your existing infrastructure.
• Three-pole, 480V operation: Ideal for 3-phase commercial or light industrial systems that run at 480V, providing synchronized tripping across all poles for enhanced safety and system protection.
• Compact molded‑case durability: Built to withstand the demands of panel environments while delivering stable protection characteristics over time.

What problems does it solve?

• Reduces downtime with a quick, tool-free replacement process in panelboards and load centers designed for plug-in breakers.
• Delivers consistent protection against nuisance trips and unexpected failures thanks to a precise thermal-magnetic trip mechanism.
• Ensures reliable 3‑phase protection in 480V installations, so all poles trip together, preventing unbalanced faults and potential equipment damage.
• Supports streamlined maintenance programs by staying compatible with your existing Square D panel ecosystem, minimizing the need for adapters or rewiring.

Ideal use cases

• Upgrading or replacing breakers in commercial panelboards and load centers that operate at 480V three-phase systems.
• New installations in settings requiring a 3-pole, 20A protection solution for branch circuits in light industrial equipment or commercial applications.
• Replacement for aging fuse or breaker configurations where fast plug-in installation and reliable thermal-magnetic protection are priorities.
• Facilities seeking OEM‑aligned components to maintain balanced coordination across their electrical distribution.

Technical snapshot

• Manufacturer: Square D
• Part Number: BDA34020Y
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 20A
• Voltage Rating: 480V
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Practical tips for deployment

• Verify the panelboard or load center is designed for plug-in breakers in the 3-pole, 480V configuration to ensure proper fit and safe operation.
• Pair with other Square D devices in the same family to maintain consistent trip characteristics and coordination across the distribution system.
• When performing replacements, power down the circuit and follow your facility’s safety procedures to minimize downtime and ensure a clean, safe swap.

With its precise thermal-magnetic protection, fast plug-in installation, and OEM‑level compatibility, the Square D BDA34020Y provides a dependable, long‑term solution for safeguarding critical circuits in panelboards and load centers. Whether you’re upgrading an older installation or equipping a new 480V, three-phase system, this 20A, 3-pole plug-in breaker is designed to deliver consistent, predictable protection you can trust.