Siemens BQ2B045 45A 2P 240V Circuit Breaker, Bolt-On | AmpState

The Siemens BQ2B045 45A 2P 240V Circuit Breaker is built for dependable, everyday electrical protection in panelboards, load centers, and electrical distribution systems. Designed for professionals who demand a precise part-number match, this bolt-on breaker delivers reliable performance where it matters most—from routine maintenance to new panel builds.

Key advantages that set the BQ2B045 apart

• Bolt-On mounting for fast, secure installation in electrical panels.
• Two-pole design with a 240V rating to safeguard multi-wire branch circuits efficiently.
• 45 Amp capacity provides robust protection for circuits that require higher current interrupting capability.
• Direct part-number match ensures compatibility with Siemens equipment, reducing guessing work during installs or replacements.
• Versatile application suitable for panelboards, load centers, and various electrical distribution setups.
• Availability from AmpState to support timely maintenance and stocking strategies.

Ideal use cases

• Routine panel maintenance where exact part compatibility is critical.
• Spare inventory for field technicians who need reliable, ready-to-go replacements.
• New panel builds or upgrades that require a Siemens BQ2B045 with a precise electrical rating.

Why this choice makes sense for your project

• Precise compatibility minimizes installation delays and misfits in Siemens systems.
• Bolt-on architecture offers a solid, vibration-resistant connection ideal for environments with occasional panel access.
• The 2-pole, 240V configuration is purpose-built for protecting dual hot-wire circuits, helping prevent nuisance trips and enhancing overall panel reliability.
• With AmpState’s inventory, you can source the exact BQ2B045 when you need it—reducing back-and-forth and ensuring you have the right part on hand.

Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.