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Siemens BQ2B080 Molded Case Circuit Breaker
- 80A
- 2 Pole
- Bolt-On
Siemens
BQ2B080
Molded Case Circuit Breaker
Brand
Siemens
SKU
BQ2B080
Quantity
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Siemens BQ2B080 - 80A 2 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens BQ2B080 - 80A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | BQ2B080 |
| Series | BQ |
| Amperage | 80A |
| 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, S1, S2, SE Panelboards |
| Wire Gauge | 4-1/0 AWG (Cu), 2-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 4 AWG (Cu), 2 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, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
Sold out
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Siemens BQ2B080 - 80A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | BQ2B080-R |
| Series | BQ |
| Amperage | 80A |
| 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, S1, S2, SE Panelboards |
| Wire Gauge | 4-1/0 AWG (Cu), 2-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 4 AWG (Cu), 2 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, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
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Description
Engineered for commercial and industrial power distribution, the Siemens BQ2B080 is a 2-pole, 80A bolt-on molded case circuit breaker. It provides standard thermal-magnetic protection with long-time and instantaneous trip functions. This breaker mounts into Siemens P1, S1, S2, and SE panelboards, ensuring a secure and stable connection for demanding applications. Rated at 10kAIC at 120/240VAC, it features a common trip mechanism and is HACR rated for use with heating and cooling equipment.Specifications
| Brand | Siemens |
|---|---|
| Part Number | BQ2B080 |
| Series | BQ |
| Amperage | 80A |
| 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, S1, S2, SE Panelboards |
| Wire Gauge | 4-1/0 AWG (Cu), 2-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 4 AWG (Cu), 2 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, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
Product FAQs
6 answersCan I install the BQ2B080 in a standard Siemens residential load center?
No. The BQ2B080 is a bolt-on circuit breaker designed exclusively for commercial panelboards, such as the Siemens P1, S1, S2, and SE series. Standard Siemens residential load centers require plug-on breakers like the QP series.
What are the higher interrupting rating alternatives to the BQ2B080?
If your electrical system requires a higher short-circuit interrupting rating than 10kAIC, you can use the BQH2B080, which is rated for 22kAIC, or the HB2B080, which is rated for 65kAIC. Both alternatives share the same physical footprint and panel compatibility.
Is the Siemens BQ2B080 HACR rated?
Yes, this breaker is HACR rated. It is certified for use with heating, air conditioning, and refrigeration equipment, ensuring safe and compliant operation for HVAC branch circuits.
How is the BQ2B080 physically connected in the panelboard?
The line side of the breaker bolts directly to the panelboard busbars for a secure, high-vibration resistant connection. The load side utilizes factory-installed lugs that accept the branch circuit wiring.
What does the LI trip function on this breaker mean?
The LI designation indicates that the breaker's thermal-magnetic trip unit provides Long-Time (L) and Instantaneous (I) protection. The long-time function protects against sustained overloads, while the instantaneous function trips immediately during a short circuit.
Can this 2-pole breaker be used on a 3-phase system?
A 2-pole breaker like the BQ2B080 can be installed in a 3-phase panelboard to feed a single-phase load, provided the panelboard accepts BQ frame breakers and the voltage does not exceed 240VAC.
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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.