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Siemens BQ3B070 Molded Case Circuit Breaker
- 70A
- 3 Pole
- Bolt-On
Siemens
BQ3B070
Molded Case Circuit Breaker
Brand
Siemens
SKU
BQ3B070
Quantity
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Siemens BQ3B070 - 70A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens BQ3B070 - 70A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | BQ3B070 |
| Series | BQ |
| Amperage | 70A |
| 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, P2, P3 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 Thermal, Fixed Magnetic |
| Available Options | Padlock Attachment, Handle Blocking Device |
|---|---|
| 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 BQ3B070 - 70A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | BQ3B070-R |
| Series | BQ |
| Amperage | 70A |
| 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, P2, P3 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 Thermal, Fixed Magnetic |
| Available Options | Padlock Attachment, Handle Blocking Device |
|---|---|
| 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
Built to support commercial power distribution, this 70-amp three-pole breaker features fixed thermal and magnetic trip elements. It integrates smoothly into Siemens P1, P2, P3, and legacy ITE panelboards using a dependable bolt-on mounting style. Rated at 10kAIC for 240VAC networks, the HACR-certified component ensures safe operation for heating, ventilation, and air conditioning loads.Specifications
| Brand | Siemens |
|---|---|
| Part Number | BQ3B070 |
| Series | BQ |
| Amperage | 70A |
| 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, P2, P3 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 Thermal, Fixed Magnetic |
| Available Options | Padlock Attachment, Handle Blocking Device |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
Product FAQs
8 answersWhich panelboards are compatible with the BQ3B070 circuit breaker?
This breaker is designed for use in Siemens P1, P2, and P3 panelboards. It is also backward compatible with legacy ITE panelboards that accept BQ frame bolt-on breakers.
Can I use the Siemens BQ3B070 to replace an older ITE or Gould breaker?
Yes. Siemens acquired the ITE and Gould breaker lines. The Siemens BQ3B070 is the direct replacement for legacy ITE and Gould BQ3B070 circuit breakers.
Does the BQ3B070 come with load-side lugs?
Yes, this breaker includes factory-installed load-side lugs that accept 8 to 1 AWG copper or 6 to 1/0 AWG aluminum wire.
How does the BQ3B070 mount into the panelboard?
It features a bolt-on connection type, meaning it physically bolts directly to the panelboard busbars for a secure, vibration-resistant electrical connection.
Is the BQ3B070 suitable for 480V systems?
No, this breaker is rated for a maximum of 240VAC. It cannot be used in 480V or 277/480V applications.
Can this breaker be used in systems requiring a 22kAIC rating?
No, the BQ3B070 has a maximum interrupting rating of 10kAIC at 240VAC. For 22kAIC applications, you would need the BQH series equivalent.
What type of trip unit does the BQ3B070 use?
It uses a fixed thermal magnetic trip unit, providing long-time delay for overloads and an instantaneous trip response for short circuits.
Does this breaker provide ground fault or arc fault protection?
No, the BQ3B070 is a standard thermal magnetic breaker providing overload and short-circuit protection. It does not include GFCI or AFCI circuitry.
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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.