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Siemens BQ3B04000S01 Molded Case Circuit Breaker
- 40A
- 3 Pole
- Bolt-On
Siemens
BQ3B04000S01
Molded Case Circuit Breaker
Brand
Siemens
SKU
BQ3B04000S01
Quantity
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Siemens BQ3B04000S01 - 40A 3 Pole Molded Case Circuit Breaker
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Quantity
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Description
Designed for applications requiring remote shutdown, the Siemens BQ3B04000S01 includes a factory-installed 120VAC shunt trip mechanism. This 3-pole, 40-amp commercial breaker delivers standard thermal-magnetic protection for 240VAC electrical systems. The unit installs into Siemens P1, P2, and P3 panelboards via a sturdy bolt-on connection. It serves as a functional substitute for the THQB32040ST1 in compatible enclosures.Specifications
| Brand | Siemens |
|---|---|
| Series | BQ |
| Amperage | 40A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 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 (Cu), 6 AWG (Al) |
| Min Wire | 14 AWG (Cu), 12 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 | Load Side Lugs, Shunt Trip 120VAC |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
Product FAQs
6 answersWhich panelboards accept the Siemens BQ3B04000S01 circuit breaker?
This bolt-on breaker is designed for installation in Siemens P1, P2, and P3 panelboards.
What wire sizes are compatible with the terminal lugs on the BQ3B04000S01?
The included load-side lugs accept 14 to 6 AWG copper conductors or 12 to 6 AWG aluminum conductors.
What does the 00S01 suffix indicate on this Siemens BQ breaker?
The 00S01 suffix designates that the breaker is equipped with a factory-installed 120VAC shunt trip mechanism, allowing the breaker to be tripped remotely.
How does the thermal-magnetic trip unit function on the BQ3B04000S01?
The fixed thermal-magnetic trip unit provides long-time (L) protection for gradual overloads and instantaneous (I) protection to quickly clear short circuits.
Is the Siemens BQ3B04000S01 a direct replacement for legacy ITE models?
Yes, Siemens manufactures the BQ series, making this a direct replacement for older ITE BQ3B04000S01 breakers used in compatible bolt-on enclosures.
Does the BQ3B04000S01 provide simultaneous disconnection for all three phases?
Yes, it utilizes an internal common-trip mechanism. If an overload or short circuit occurs on any single phase, all three poles will trip simultaneously to protect three-phase equipment from single-phasing damage.
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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.