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Siemens BQ2B12500S01 Molded Case Circuit Breaker
- 125A
- 2 Pole
- Bolt-On
Siemens
BQ2B12500S01
Molded Case Circuit Breaker
Brand
Siemens
SKU
BQ2B12500S01
Quantity
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Siemens BQ2B12500S01 - 125A 2 Pole Molded Case Circuit Breaker
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Description
Designed for advanced control applications, the Siemens BQ2B12500S01 features a factory-installed 120VAC shunt trip for remote disconnect capabilities. This 125A, two-pole molded case circuit breaker delivers reliable thermal-magnetic protection for 120/240VAC systems. It utilizes a bolt-on mounting style to ensure a secure connection within Siemens P1 and legacy ITE panelboards. Rated at 10kAIC, this HACR-rated unit includes common trip functionality and standard load side lugs.Specifications
| Brand | Siemens |
|---|---|
| Series | BQ |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | BQ |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1 Panelboards, ITE Panelboards |
| Wire Gauge | 4-2/0 AWG (Cu), 2-2/0 AWG (Al) |
| Max Wire | 2/0 AWG |
| Min Wire | 4 AWG (Cu), 2 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip 120VAC, Load Side Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Product FAQs
6 answersIs the BQ2B12500S01 compatible with older ITE panelboards?
Yes. Siemens acquired ITE and maintains backward compatibility for the BQ frame. This breaker will bolt directly into legacy ITE panelboards as well as modern Siemens P1 panelboards.
What does the 00S01 suffix mean on the BQ2B12500S01?
The 00S01 suffix indicates that this breaker includes a factory-installed 120VAC shunt trip. This differentiates it from the standard BQ2B125, which does not have remote tripping capabilities.
How does the shunt trip operate on this breaker?
The integrated shunt trip requires an external 120VAC control signal. When voltage is applied to the shunt trip leads, it mechanically trips the breaker to open the contacts and disconnect the load.
When is the shunt trip feature typically utilized?
The 120VAC shunt trip is commonly used in commercial and industrial control applications that require a remote disconnect for safety. Examples include tying the breaker into a fire alarm system, an emergency stop button, or a remote control panel.
Is the BQ2B12500S01 suitable for HVAC applications?
Yes. This breaker is HACR rated, meaning it is tested and approved for use with heating, air conditioning, and refrigeration equipment.
What is the UPC for the Siemens BQ2B12500S01?
The standard industry UPC for this specific shunt trip circuit breaker is 783643088849.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 74 reviews.
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.
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Rating
74 reviews
- DVDavid V. O.Verified BuyerReviewingSiemens BQ3B030H - 30A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/3/26Electrician
Came
fast
- HSHector S.Verified BuyerReviewingSiemens BQ3B100H - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/27/26Perfect replacement
Fit perfectly and good price
- AFAnthony F.Verified BuyerReviewingSiemens BQ2B020 - 20A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/25/26works as expected
works as expected
- MSMike S.Verified BuyerReviewingEaton / Cutler-Hammer BQ250250 - 50/50A Quadplex Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/12/26Electrical company
Breaker worked awesome thank you very much
- PEPhilip E.Verified BuyerReviewingSiemens BQ3B020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/10/26Siemens BQ3B020
The breaker arrived as described and on time. It works as expected. I will order from SuperBreakers again in the future without hesitation.