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Siemens BQ2B090 Molded Case Circuit Breaker
- 90A
- 2 Pole
- Bolt-On
Siemens
BQ2B090
Molded Case Circuit Breaker
Brand
Siemens
SKU
BQ2B090
Quantity
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Siemens BQ2B090 - 90A 2 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens BQ2B090 - 90A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | BQ2B090 |
| Series | BQ |
| Amperage | 90A |
| 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 | 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, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
Sold out
Quantity
Siemens BQ2B090 - 90A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | BQ2B090-R |
| Series | BQ |
| Amperage | 90A |
| 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 | 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, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
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Description
Engineered for commercial power distribution, this 90A MCCB handles demanding electrical loads. It delivers consistent performance for facilities requiring robust protection. The two-pole device mounts into Siemens P1, P2, and P3 panelboards using a secure bolt-on connection. It serves as a reliable substitute for BAB2090 and THQB2190. Featuring a 10kAIC rating at 120/240VAC, the unit utilizes thermal-magnetic trip technology and is HACR rated for HVAC equipment.Specifications
| Brand | Siemens |
|---|---|
| Part Number | BQ2B090 |
| Series | BQ |
| Amperage | 90A |
| 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 | 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, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
Product FAQs
6 answersCan I install the BQ2B090 in a standard Siemens residential load center?
No. The BQ2B090 is a bolt-on molded case circuit breaker designed specifically for commercial Siemens P1, P2, and P3 panelboards. It will not fit in residential plug-on load centers that require Type QP or QT breakers.
What is the difference between the BQ2B090 and the BQ2B090H?
The standard BQ2B090 has an interrupting rating of 10kAIC at 120/240VAC. The BQ2B090H is the high-interrupting version, rated at 22kAIC. Ensure your panel schedule and fault current requirements match the correct rating before installation.
Does the BQ2B090 come with both line and load side lugs?
Siemens BQ frame circuit breakers are supplied with load side lugs as standard. If line side lugs are required for your specific application, a variant with the L suffix is needed, or the lugs must be ordered separately.
Is the BQ2B090 suitable for HVAC applications?
Yes, this breaker is HACR rated, making it suitable for use with heating, air conditioning, and refrigeration equipment that requires a 90A overcurrent protection device.
Can I use Eaton or Square D bolt-on breakers in place of the Siemens BQ2B090?
No. You must use Siemens BQ frame breakers in Siemens P1, P2, and P3 panelboards to maintain the UL listing of the panel. Mixing brands can create improper connections and potential fire hazards.
Can the BQ2B090 replace older ITE bolt-on breakers?
Yes. Siemens acquired ITE, and the current Siemens BQ frame serves as the direct replacement for legacy ITE bolt-on breakers of the same frame size and specifications. Always verify the panel label for approved replacement 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.