Siemens BQD345 45A 3P 480V Circuit Breaker | AmpState

The Siemens BQD345 45A 3P 480V Circuit Breaker is a trusted three‑phase protection device built for reliable performance in panelboards, load centers, and electrical distribution systems. With a 45 A rating and three poles, it delivers precise, on‑site protection for demanding industrial and commercial applications operating at up to 480 volts.

What sets this breaker apart is its alignment with the original part specification, making it an ideal direct replacement to preserve your BOM integrity. Stocking the BQD345 helps minimize downtime during maintenance or upgrades, ensuring your electrical distribution stays aligned with the original design intent.

Why this Siemens BQD345 matters for your electrical system

• Three‑pole, 480V compatibility — best suited for three‑phase circuits in distribution panels and electrical rooms, supporting reliable protection in higher‑voltage environments.
• 45 A current rating — delivers sized protection for circuits that demand solid, dependable performance without unnecessary interruptions.
• Direct BOM alignment — ideal for replacement projects where maintaining the original part number matters for documentation and maintenance scheduling.
• Stockable spare for downtime reduction — keep a ready spare on hand to quickly restore service and minimize production impact.
• Part of a trusted Siemens line — designed to meet the compatibility and reliability expectations you rely on in critical electrical infrastructure.

Who should consider the BQD345

• Maintenance teams tasked with keeping panelboards and load centers running smoothly.
• Electrical contractors planning replacements or refurbishments in facilities with Siemens‑compatible gear.
• Plant and facility managers seeking dependable protection for three‑phase distribution networks.

In practical terms, this breaker helps you protect branch circuits and feeders within three‑phase systems, while maintaining consistency with your existing equipment catalog. It’s a sensible choice for upgrades, spares, or long‑term reliability planning in environments that rely on Siemens components.

Specifications at a glance

• Manufacturer: Siemens
• Part Number: BQD345
• Product Type: Circuit Breaker
• Amperage: 45 A
• Poles: 3
• Voltage: 480V
• Availability: Available from AmpState

Need help matching a part number or confirming compatibility with your specific panel or load center? Message us, and we’ll help you confirm fit to keep your project on track.