The Siemens BQ2B010 molded case circuit breaker protects circuits against overloads and short circuits. Rated 10A and 120/240VAC, this 2-pole BQ series breaker has a 10kA interrupting rating at 120/240VAC. It uses bolt-on mounting and a load-side lug terminal connection. Thermal magnetic tripping provides fixed thermal and fixed magnetic settings with long-time and instantaneous functions. It is UL approved and meets WEEE, RoHS, REACh and HACR standards.
When should I select the Siemens BQ2B010 for a 10A circuit?
Its rated current is 10A. Select it when the circuit design calls for a 10A breaker, coordinating that selection with the load and conductor protection requirements.
What voltage and phase should I use this breaker for?
This is a 2-pole breaker rated 120/240VAC for single-phase use. Match the circuit voltage and pole requirements to these ratings when selecting it.
How do I evaluate the 10kA interrupting rating?
The interrupting rating is 10kA at 120/240VAC. Compare the available fault current at the installation point with this rating; it must not exceed the breaker's interrupting capacity.
How does the thermal-magnetic trip work, and can I adjust it?
The thermal element provides long-time overload protection, while the magnetic element provides instantaneous response to short-circuit current. Both trip settings are fixed, so select the breaker based on its preset protection rather than field adjustment.
What does bolt-on mounting mean for installation?
Bolt-on mounting uses a bolted connection to secure the breaker. Plan for tool access to the mounting hardware during installation.
What conductor sizes should I plan for?
The wire limits are AWG 16 Cu minimum and AWG 10 maximum. Check conductor size against these limits while also meeting the circuit's load and conductor protection requirements.
How is the outgoing circuit connected?
The outgoing circuit connects through a load-side lug. Plan to terminate the load conductor at that lug and select its size within the breaker's wire limits.
What dimensions should I account for in the installation layout?
The breaker measures 2 in high, 3 in wide and 4 in deep. Use these dimensions to account for the breaker body in the installation layout.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 74 reviews.
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Rated 4.9 out of 5 stars
Based on 74 reviews
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Reviews Summary
Generated by AI from 67 most recent customer reviews
Last updated 6/3/26
Customers say these breakers arrive quickly and fit perfectly for their electrical needs. Fast shipping and competitive pricing are frequently mentioned, with many users appreciating the availability of hard-to-find and older-style breakers. The products are well-packaged and arrive in good condition. Most customers report successful installations and reliable performance. A few note missing items from orders or concerns about product condition, though the majority express satisfaction with their purchases and indicate they would order again.