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Siemens BQ3B090 Molded Case Circuit Breaker
- 90A
- 3 Pole
- Bolt-On
Siemens
BQ3B090
Molded Case Circuit Breaker
Brand
Siemens
SKU
BQ3B090
Quantity
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Siemens BQ3B090 - 90A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens BQ3B090 - 90A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | BQ3B090 |
| Series | BQ |
| Amperage | 90A |
| 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 Panelboards, ITE 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
Sold out
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Siemens BQ3B090 - 90A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | BQ3B090-R |
| Series | BQ |
| Amperage | 90A |
| 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 Panelboards, ITE 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
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Description
Engineered for commercial and industrial power distribution, the Siemens BQ3B090 is a 3-pole, 90A molded case circuit breaker. It provides essential overcurrent and short-circuit protection for demanding electrical systems. This bolt-on unit installs seamlessly into Siemens P1 and legacy ITE panelboards. It serves as an exact cross-reference for BAB3090 and THQB32090 breakers. Rated for 10 kAIC at 240VAC, it features a fixed thermal-magnetic trip unit and includes load side lugs.Specifications
| Brand | Siemens |
|---|---|
| Part Number | BQ3B090 |
| Series | BQ |
| Amperage | 90A |
| 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 Panelboards, ITE 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
Product FAQs
6 answersWhat panelboards are compatible with the BQ3B090 circuit breaker?
This bolt-on breaker is designed for use in Siemens P1 commercial panelboards, as well as legacy ITE panelboards.
Are there higher interrupting rating equivalents for the BQ3B090?
Yes. If your system requires a higher fault rating than 10kAIC, you can use the BQ3B090H for 22kAIC or the HB3B090 for 65kAIC applications.
Is the Siemens BQ3B090 HACR rated?
Yes, this breaker is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment.
Can I install the BQ3B090 in a standard residential load center?
No. The BQ3B090 features a bolt-on connection intended for commercial panelboards. Standard Siemens residential load centers require plug-on breakers, such as the QP series.
Can this 240V breaker be used on a 208Y/120V 3-phase system?
Yes, the 240VAC maximum voltage rating makes it fully compatible with standard 208Y/120V 3-phase, 4-wire systems commonly found in commercial facilities.
Does the BQ3B090 come with load-side lugs?
Yes, this breaker is supplied with factory-installed load-side lugs that accept both copper and aluminum conductors.
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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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All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
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.