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Siemens BQ3B020H Molded Case Circuit Breaker
- 20A
- 3 Pole
- Bolt-On
Siemens
BQ3B020H
Molded Case Circuit Breaker
Brand
Siemens
SKU
BQ3B020H
Quantity
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Siemens BQ3B020H - 20A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
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Siemens BQ3B020H - 20A 3 Pole Molded Case Circuit Breaker
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Quantity
| Brand | Siemens |
|---|---|
| Part Number | BQ3B020H |
| Series | BQ |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 22kA @ 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, HACR Rated, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
Sold out
Quantity
Siemens BQ3B020H - 20A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | BQ3B020H-R |
| Series | BQ |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 22kA @ 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, HACR Rated, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
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Description
Part of the robust BQ family, this 20A three-pole breaker provides reliable thermal-magnetic protection for commercial and industrial electrical systems. It features a high interrupting capacity of 22kA at 240VAC to handle demanding fault conditions. Designed specifically for Siemens infrastructure, the unit installs into P1, P2, and P3 panelboards using a secure bolt-on connection. The lug terminals accept 14-6 AWG copper or 12-6 AWG aluminum wire for flexible installation.Specifications
| Brand | Siemens |
|---|---|
| Part Number | BQ3B020H-R |
| Series | BQ |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 22kA @ 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, HACR Rated, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
Product FAQs
7 answersWhat is the difference between the Siemens BQ3B020 and the BQ3B020H?
The H suffix indicates a high interrupting capacity. While the standard BQ3B020 is rated for 10kAIC at 240VAC, the BQ3B020H is rated for 22kAIC. They share the same physical dimensions and bolt-on mounting, making the BQ3B020H a direct upgrade for systems requiring higher fault current protection.
Which panelboards are compatible with the BQ3B020H circuit breaker?
This bolt-on breaker is designed specifically for use in Siemens P1, P2, and P3 commercial and industrial panelboards. It is not compatible with standard residential plug-on load centers.
Is the Siemens BQ3B020H HACR rated?
Yes, this breaker is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment that requires group motor protection.
What wire gauges are accepted by the lugs on the BQ3B020H?
The factory installed lugs accept 14 AWG to 6 AWG copper conductors, or 12 AWG to 6 AWG aluminum conductors. Always ensure connections are torqued to the manufacturer specifications printed on the breaker label.
How does the thermal magnetic trip unit operate on this breaker?
The BQ3B020H features fixed thermal and fixed magnetic trip settings, providing Long-Time (L) protection for sustained overloads and Instantaneous (I) protection for short circuits. The trip unit is non-interchangeable.
Why use a bolt-on breaker like the BQ3B020H instead of a plug-on type?
Bolt-on breakers provide a more secure mechanical and electrical connection to the panelboard bus. This is critical in commercial and industrial environments where equipment vibration or thermal cycling could cause a plug-on connection to loosen over time.
How much panel space does the BQ3B020H require?
Built on the Siemens BQ frame, this breaker has a 1-inch per pole width. As a 3-pole device, it requires exactly three inches of mounting space on the panelboard bus.
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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.