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Siemens BQ2B04000S01 Molded Case Circuit Breaker
- 40A
- 2 Pole
- Bolt-On
Siemens
BQ2B04000S01
Molded Case Circuit Breaker
Brand
Siemens
SKU
BQ2B04000S01
Quantity
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Siemens BQ2B04000S01 - 40A 2 Pole Molded Case Circuit Breaker
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Description
Built for remote shutdown capabilities, the Siemens BQ2B04000S01 is a 2-pole, 40A molded case circuit breaker featuring a factory-installed 120VAC shunt trip. It delivers reliable thermal-magnetic protection for 120/240VAC commercial and industrial electrical systems. Designed for bolt-on installation, this MCCB mounts into Siemens P1, P2, and P3 panelboards. It provides a secure, vibration-resistant connection for demanding environments. This HACR-rated breaker features a 10 kAIC rating.Specifications
| Brand | Siemens |
|---|---|
| Series | BQ |
| Amperage | 40A |
| 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, P2, P3 Panelboards |
| Wire Gauge | 14-6 AWG (Cu), 12-6 AWG (Al) |
| Max Wire | 6 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs, Shunt Trip 120VAC |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
Product FAQs
5 answersWhich panelboards are compatible with the Siemens BQ2B04000S01 circuit breaker?
This bolt-on molded case circuit breaker is designed for installation in Siemens P1, P2, and P3 panelboards.
What does the 00S01 suffix indicate on this Siemens BQ breaker?
The 00S01 suffix indicates that this circuit breaker includes a factory-installed 120VAC shunt trip, allowing the breaker to be tripped remotely using a secondary power source.
Is the Siemens BQ2B04000S01 suitable for use with HVAC equipment?
Yes, this breaker is HACR rated, making it suitable for use with heating, air conditioning, and refrigeration equipment that requires HACR-rated overcurrent protection.
What are the torque requirements for the load lugs on this 40A breaker?
Torque specifications vary based on the wire gauge used. Always refer to the factory label on the side of the breaker for the exact inch-pound (lb-in) requirements before terminating the 14-6 AWG copper or 12-6 AWG aluminum conductors.
Can I use a BQD breaker as a direct replacement for this BQ breaker?
While both are 1-inch per pole bolt-on breakers, BQD breakers are rated for 480Y/277V systems and have different interrupting ratings. Always verify your panel's specific requirements and series ratings before substituting breaker types.
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Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 73 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
73 reviews
- 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.
- PLPaul L.Verified BuyerReviewingSiemens BQ1B020 - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/23/26Breaker
Quick shipping. Exact fit.