Schneider Electric Square D BDA34040Y Circuit Breaker

Schneider Electric's Square D BDA34040Y is a PowerPact B-frame molded‑case circuit breaker rated for 40 amps and three poles, designed for 480Y/277 VAC distribution in commercial and light‑industrial applications, and suitable for use with standard 50/60 Hz electrical systems. It features an I‑Line plug‑in design with ABC phase connection that simplifies installation in compatible I‑Line panelboards, while its thermal‑magnetic protection provides distinct long‑time and instantaneous trip functions to guard feeders and downstream equipment from overloads and short circuits. With an 18 kA interrupting capacity at 480 VAC, the BDA34040Y offers robust fault interruption for moderate fault currents, and its 3‑pole, 40‑amp rating makes it a suitable feeder or branch‑circuit protection device within the PowerPact B family for distribution panels, motor feeders, and other commercial/industrial loads. As part of the BD/PowerPact lineup, this unit shares common trip characteristics and dimensions with other PowerPact B breakers, and is intended for use in BD enclosures with correct load‑side wiring, providing a reliable, code‑compliant protection solution for distributed power systems.