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Siemens BQD270 Molded Case Circuit Breaker
- 70A
- 2 Pole
- Bolt-On
Siemens
BQD270
Molded Case Circuit Breaker
Brand
Siemens
SKU
BQD270
Quantity
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Siemens BQD270 - 70A 2 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens BQD270 - 70A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | BQD270 |
| Series | BQD |
| Amperage | 70A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 125/250VDC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC, 14kA @ 480Y/277VAC, 14kA @ 125/250VDC |
| Frame Type | BQD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 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 |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Quick-Make/Quick-Break, Trip-Free Mechanism |
Quantity
Siemens BQD270 - 70A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | BQD270-R |
| Series | BQD |
| Amperage | 70A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 125/250VDC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC, 14kA @ 480Y/277VAC, 14kA @ 125/250VDC |
| Frame Type | BQD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 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 |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Quick-Make/Quick-Break, Trip-Free Mechanism |
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Description
The Siemens BQD270 is a 2-pole, 70-amp molded case circuit breaker designed for commercial power distribution. Featuring a compact 1-inch per pole width, it provides robust thermal-magnetic protection for branch circuits. This bolt-on MCCB installs seamlessly into Siemens P1 through P5 panelboards. It utilizes a low tab connection for quick, secure mounting to the panelboard busbar. Rated 65 kAIC at 240V and 14 kAIC at 480Y/277V, the unit is HACR rated for HVAC applications.Specifications
| Brand | Siemens |
|---|---|
| Part Number | BQD270 |
| Series | BQD |
| Amperage | 70A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 125/250VDC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC, 14kA @ 480Y/277VAC, 14kA @ 125/250VDC |
| Frame Type | BQD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 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 |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Quick-Make/Quick-Break, Trip-Free Mechanism |
Product FAQs
10 answersCan I install the BQD270 in a standard residential load center?
No. The BQD270 is a bolt-on molded case circuit breaker designed specifically for Siemens P1, P2, P3, P4, and P5 commercial panelboards. It is not compatible with standard plug-on residential load centers.
Can this breaker be used as a back-fed main breaker?
Yes. The BQD270 can be configured as a back-fed main breaker in Siemens P1 panelboards. You must use a field-installable hold-down kit, such as the MBKBFA, to ensure a secure and code-compliant installation.
Is the BQD270 suitable for heating and air conditioning equipment?
Yes. This breaker is HACR rated, making it suitable for protecting heating, air conditioning, and refrigeration circuits that require this specific UL certification.
Are Siemens BQD series breakers suitable for reverse feed applications?
Yes. The BQD270 is suitable for reverse feed applications. This allows the breaker to be wired with the line and load connections reversed without compromising its thermal-magnetic trip characteristics.
What is the difference between the Siemens BQD270 and CQD270?
Both breakers share the same 70A capacity and electrical ratings, but their mounting styles differ. The BQD270 is a bolt-on breaker designed for Siemens panelboards. The CQD270 is the DIN rail mounted equivalent, designed to be installed on a customer-supplied DIN rail or bolted directly to a surface.
Can the BQD270 be used in DC voltage systems?
Yes. While commonly used for 480VAC or 240VAC systems, the BQD270 is also rated for 125/250VDC applications with an interrupting capacity of 14kAIC. This makes it suitable for specific industrial control panels or battery backup systems.
Does the BQD270 require a separate terminal lug kit for installation?
No. The breaker includes factory-installed line and load lugs. These lugs accept 8 to 1 AWG copper conductors or 6 to 1/0 AWG aluminum conductors. Always apply the torque specifications printed directly on the breaker label during installation.
Is there a CSA-only equivalent for the BQD270?
Yes. The standard BQD270 is UL listed. If your specific application requires a CSA-only certified breaker that is not UL listed, you will need to source the BQD6 series equivalent.
Is the BQD270 rated for High Intensity Discharge (HID) lighting?
No. While some lower amperage Siemens BQD breakers carry an HID rating, that certification is only applicable to 15A through 30A models. The 70A BQD270 does not carry an HID rating.
Can the BQD270 be used as a switching duty (SWD) breaker for fluorescent lighting?
No. The SWD rating for switching fluorescent lighting is only applied to single-pole 15A and 20A BQD breakers. The 70A BQD270 is not SWD marked.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 61 reviews.
Reviews Summary
Generated by AI from 47 most recent customer reviews
Last updated 8/15/25
Customers say this electrical supply service delivers breakers with exceptional speed and reliability. Many reviews mention the straightforward ordering process through an easy-to-navigate website. Frequent comments address competitive pricing and accurate product delivery. The selection of breakers receives consistent praise, with users noting the products match specifications precisely. Reviews highlight the availability of inventory and prompt shipping, often exceeding delivery expectations.
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Rating
61 reviews
- PCPACIFIC C. B.Verified BuyerReviewingSiemens BQD380 - 80A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/11/26Used breaker in like New state
Order a reconditioned breaker to fulfill an order, it was in excellent condition . Price was just right.
Very satisfied with my purchase and the end user was happy as well.
- BCBubba C.Verified BuyerReviewingSiemens BQD390 - 90A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/24/26BQD breakers
Always love working with Superbreakers! Excellent pricing and availability on pretty much any sort of breaker you need. The packaging is always top notch and they ship your order out as soon as you purchase. Love working with the Superbreakers team!
- LPLUCIAN P.Verified BuyerReviewingSiemens BQD2100 - 100A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/21/26Super breakers
Very good prices , well stock inventory.
Looking forward for more business opportunities.
I like the knowledge that the company employs
professionals and people who are willing to help and support.
- RGRon G.Verified BuyerReviewingSiemens BQD320 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/2/26Breakers
Order was shipped and on time. The ordering process was easy and the service was great.
- GNGreg N.Verified BuyerReviewingSiemens BQD340 - 40A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/26/26Excellent Customer Service
Easy ordering & Drew Wilson helped me with this order. I will definitely be using you again in the near future especially with his excellent service he provided.