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Siemens B170 Molded Case Circuit Breaker
- 70A
- 1 Pole
- Bolt-On
Siemens
B170
Molded Case Circuit Breaker
Brand
Siemens
SKU
B170
Quantity
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Siemens B170 - 70A 1 Pole Molded Case Circuit Breaker
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Description
Serving as a dependable standard-tier solution, the Siemens B170 delivers 10kAIC thermal-magnetic protection for commercial facilities. The single-pole, 70-amp device integrates seamlessly into Siemens P1, P2, P3, P4, and P5 panelboards via a sturdy bolt-on mounting mechanism. Facility managers frequently utilize this model to maintain existing infrastructure, as it accommodates 4-1/0 AWG copper wiring. It functions as a functional substitute for BAB1070, QOB170, and THQB1170 configurations.Specifications
| Brand | Siemens |
|---|---|
| Part Number | B170 |
| Series | BL |
| Amperage | 70A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 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 Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment, Handle Tie |
|---|---|
| Accessories | None included |
| Standards | CSA C22.2 No. 5, UL 489, HACR Rated |
| Approval | CSA, UL |
| Temp Rating | 40C |
Product FAQs
7 answersWhich panelboards are compatible with the Siemens B170 circuit breaker?
The B170 is designed exclusively for use in Siemens P1, P2, P3, P4, and P5 panelboards. It features a bolt-on mounting style that secures directly to the panel bus.
Can I use the Siemens B170 to replace an Eaton BAB1070, Square D QOB170, or GE THQB1170?
While the B170 shares the same 70A, 1-pole electrical specifications as those breakers, it is not physically interchangeable. The B170 will only fit Siemens or legacy ITE panelboards designed for BL-frame bolt-on breakers.
Is the Siemens B170 the same as the ITE B170?
Yes. Siemens acquired ITE and continued manufacturing the BL series. A modern Siemens B170 is the direct replacement for a legacy ITE B170.
What wire sizes and materials are accepted by the B170 lugs?
The terminal lugs on the B170 accept 4 AWG to 1/0 AWG copper wire, or 2 AWG to 1/0 AWG aluminum wire.
Is the Siemens B170 HACR rated?
Yes, this breaker is HACR rated. It is suitable for use with heating, air conditioning, and refrigeration equipment that requires this specific UL listing.
What does the BL frame type indicate on the B170?
The BL frame designates this as a standard-tier, bolt-on molded case circuit breaker for Siemens commercial panelboards. It provides thermal-magnetic protection with a 10kA interrupting capacity at 120/240VAC.
Are the trip settings on the Siemens B170 adjustable?
No. The B170 utilizes fixed thermal and fixed magnetic trip elements for standard Long-Time and Instantaneous (LI) protection. The trip curve cannot be adjusted in the field.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 35 reviews.
Total 5 star reviews: 34 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
Reviews Summary
Generated by AI from 66 most recent customer reviews
Last updated 8/15/25
Customers say these circuit breakers meet their specifications and perform as expected. Many reviews highlight the quick delivery times and competitive pricing. Frequent comments address the reliable product quality and ease of installation. The ordering process receives praise for its simplicity, with users noting consistent product availability.
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Rating
35 reviews
- TSTom S.Verified BuyerReviewingSiemens B3100 3 Pole Circuit BreakerI recommend this productRated 5 out of 5 stars8/3/26Superbreakers is our go to!
Great prices, great service and quick delivery.
- MGMaggie G.Verified BuyerReviewingSiemens B250 - 50A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/24/26Great Service
Came in great condition and in an incredibly timely manner. Will continue superbreakers for all of my orders in the future!
- DBDonnie B.Verified BuyerReviewingSiemens B115 - 15A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/11/26New Breaker
Awesome breaker & Superbreakers is a awesome company!
- BLBrian L.Verified BuyerReviewingSiemens B120 - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/4/26Brian
Works great
- JFJoseph F.Verified BuyerReviewingSiemens B120 - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/23/26Great value
It was a great value