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Siemens BQ2B020 Molded Case Circuit Breaker
- 20A
- 2 Pole
- Bolt-On
Siemens
BQ2B020
Molded Case Circuit Breaker
Brand
Siemens
SKU
BQ2B020
Quantity
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Siemens BQ2B020 - 20A 2 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens BQ2B020 - 20A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | BQ2B020 |
| Series | BQ |
| Amperage | 20A |
| 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 | 14-6 AWG (Cu), 12-6 AWG (Al) |
| Max Wire | 6 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| 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
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Siemens BQ2B020 - 20A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | BQ2B020-R |
| Series | BQ |
| Amperage | 20A |
| 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 | 14-6 AWG (Cu), 12-6 AWG (Al) |
| Max Wire | 6 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| 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
Built for reliable branch circuit protection, the Siemens BQ2B020 is a 20-amp, 2-pole molded case circuit breaker. It operates at 120/240VAC and utilizes thermal-magnetic trip technology to defend against electrical faults. The breaker fastens securely into Siemens P1, P2, and P3 panelboards via a bolt-on connection, making it ideal for commercial environments. With a 10kAIC rating and HACR approval, it serves as a dependable solution for general-purpose and HVAC applications.Specifications
| Brand | Siemens |
|---|---|
| Part Number | BQ2B020 |
| Series | BQ |
| Amperage | 20A |
| 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 | 14-6 AWG (Cu), 12-6 AWG (Al) |
| Max Wire | 6 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| 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
7 answersWhat panelboards are compatible with the Siemens BQ2B020?
The BQ2B020 is designed as a branch circuit breaker for Siemens P1, P2, and P3 panelboards. It features a bolt-on mounting style that fastens directly to the panel busbars.
Can the Siemens BQ2B020 replace older ITE or Gould BQ breakers?
Yes. Siemens acquired the ITE and Gould lines, and the current Siemens BQ series is a direct, interchangeable replacement for older ITE or Gould BQ frame bolt-on circuit breakers.
What size wire do the load side lugs on the BQ2B020 accept?
The factory-installed load side lugs accept 14 to 6 AWG copper (Cu) conductors or 12 to 6 AWG aluminum (Al) conductors.
Does the BQ2B020 come with both line side and load side lugs?
Standard Siemens BQ breakers are supplied with load side lugs only, as the line side bolts directly to the panelboard bus. If your application requires line side lugs for a standalone mounting configuration, a modified breaker with an L suffix must be sourced.
What does the LI trip function mean on this breaker?
The LI designation indicates that the thermal-magnetic trip unit provides Long-Time (L) thermal overload protection and Instantaneous (I) magnetic short-circuit protection. Both the thermal and magnetic set points are fixed on the BQ2B020.
Is there a higher interrupting rating version of the BQ2B020 available?
Yes. The standard BQ2B020 provides a 10kAIC rating. If your application requires a higher interrupting capacity in the same physical footprint, you can cross-reference to the BQ2B020H for a 22kAIC rating or the HB2B020 for a 65kAIC rating.
How much panel space does the BQ2B020 require?
As a 2-pole BQ frame breaker, it requires 2 inches of total panel space. Siemens BQ series breakers are built on a standard 1-inch per pole module width.
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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.