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

Siemens BQ2B045 is a reliable 45 A, 240 V, 2-pole bolt-on molded case circuit breaker designed to shield your electrical system from overcurrent and short-circuit events in panelboards and load centers. This unit is built for dependable, long-term performance in a range of settings, from home to light commercial installations.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection that stays put through real-world conditions.
• Thermal-magnetic trip unit delivers stable, repeatable protection, responding quickly to overloads while minimizing nuisance trips.
• OEM compatibility is ensured with matching Siemens load centers and panelboards, enabling a straightforward, worry-free upgrade or replacement.
• Versatile application suitable for residential, commercial, and light industrial electrical systems requiring reliable 2-pole protection at 240 V.
• Product specifics — Part Number: BQ2B045; Type: Thermal-magnetic molded case circuit breaker; Poles: 2; Mounting Style: Bolt-on; Application: Branch circuit overcurrent and short-circuit protection.

The BQ2B045 excels in scenarios where robust protection and install-time confidence matter most. Use it to guard branch circuits feeding critical equipment, lighting runs, or receptacle banks within Siemens panelboards and load centers. The bolt-on design simplifies mounting in compatible enclosures, making it a practical choice for service upgrades, panel replacements, or new installations where 240-volt, 45-amp protection is required.

Why choose this Siemens MCCB over generic alternatives? It combines a proven thermal-magnetic trip mechanism with a secure mounting method and OEM-aligned compatibility, ensuring consistent protection performance across installations. In real-world terms, you’ll benefit from fewer false trips, quicker fault clearance, and a safer, more reliable electrical system—without compatibility concerns or wiring changes.

Purchase the Siemens BQ2B045 from AmpState to equip your panelboard or load center with trusted Siemens protection that’s ready to install, designed for durability, and backed by a legacy of electrical reliability.