Siemens BQD12000S01 20A 1P 277V Circuit Breaker | AmpState

Experience reliable circuit protection with the Siemens BQD12000S01 20A 1P 277V Circuit Breaker. Built for everyday electrical work, this single-pole breaker guards each branch circuit in panelboards, load centers, and electrical distribution systems, delivering dependable interruption when overcurrent occurs.

What sets this unit apart:

• Precise 1-pole, 20-amp rating for safeguarding individual branches, ideal for lighting and general commercial loads powered at 277V.
• 277V compatibility tailored for commercial/industrial architectures where lighting and control circuits run at higher voltage levels.
• Part-number stability—a go-to choice for retrofit work and maintenance planning when you must keep the same replacement part number across a building portfolio.
• Seamless integration with Siemens panelboards, load centers, and electrical distribution setups; minimize rewiring and inventory challenges during upgrades.
• Easy procurement from AmpState and support to verify fit if you’re unsure about compatibility.

This breaker is especially valuable for facilities teams, electricians, and contractors who manage ongoing maintenance or retrofit projects in commercial spaces. It provides predictable performance, keeps inventories aligned with your existing Siemens installations, and reduces downtime when replacements are needed.

Use cases and practical guidance

• Replace an aging or failed branch circuit on a 277V lighting circuit in a commercial building without changing the surrounding panel infrastructure.
• Stock a standard spare that matches your existing Siemens BQD family units to streamline maintenance planning.
• Plan retrofits where keeping the original part number simplifies ordering, procurement, and documentation.

If you need help matching a part number or confirming compatibility, message AmpState and we’ll help you confirm fit.