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Siemens BQ3B05000S01 Molded Case Circuit Breaker
- 50A
- 3 Pole
- Bolt-On
Siemens
BQ3B05000S01
Molded Case Circuit Breaker
Brand
Siemens
SKU
BQ3B05000S01
Quantity
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Siemens BQ3B05000S01 - 50A 3 Pole Molded Case Circuit Breaker
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Description
Designed for commercial and industrial power distribution, this 50-amp Siemens BQ frame breaker provides reliable thermal-magnetic protection. It features a factory-installed 120VAC shunt trip mechanism, allowing facility managers to remotely open the circuit for emergency shutdowns or automated control systems. The bolt-on design installs securely into Siemens P1, P2, and P3 panelboards. Rated for 10kAIC at 240VAC, it delivers standard interrupting capacity for commercial branch circuits.Specifications
| Brand | Siemens |
|---|---|
| Part Number | BQ3B05000S01 |
| Series | BQ |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P1, P2, P3 Panelboards |
| Wire Gauge | 8-1 AWG (Cu), 6-1/0 AWG (Al) |
| Max Wire | 1 AWG (Cu), 1/0 AWG (Al) |
| Min Wire | 8 AWG (Cu), 6 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, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip |
Product FAQs
6 answersWhat does the 00S01 suffix indicate on the BQ3B05000S01 breaker?
The 00S01 suffix signifies that this breaker includes a factory-installed 120V AC shunt trip mechanism. This feature allows facility managers or automated systems to remotely open the circuit.
Which panelboards are compatible with the BQ3B05000S01?
This BQ frame breaker is designed for bolt-on installation in Siemens P1, P2, and P3 panelboards.
Can this breaker replace an older ITE BQ3B05000S01?
Yes, Siemens acquired ITE, making this current Siemens model the direct replacement for the legacy ITE BQ3B05000S01.
What are the acceptable wire sizes for the BQ3B05000S01 terminals?
The load side lugs accept 8 to 1 AWG copper wire or 6 to 1/0 AWG aluminum wire.
How does the LI trip function operate on this 50A breaker?
The thermal-magnetic trip unit provides Long-Time (L) protection against sustained overcurrents and Instantaneous (I) protection to rapidly clear short circuits.
Are the trip settings adjustable on the BQ3B05000S01?
No, this breaker features fixed thermal and fixed magnetic trip settings.
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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.