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Siemens B315 Miniature Circuit Breaker
- 15A
- 3 Pole
- Bolt-On
Siemens
B315
Miniature Circuit Breaker
Brand
Siemens
SKU
B315
Quantity
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Siemens B315 - 15A 3 Pole Miniature Circuit Breaker
Re-Certified
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Siemens B315 - 15A 3 Pole Miniature Circuit Breaker
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| Brand | Siemens |
|---|---|
| Part Number | B315 |
| Series | BL |
| Amperage | 15A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 14-10 AWG (Cu), 12-10 AWG (Al) |
| Max Wire | 10 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
Sold out
Quantity
Siemens B315 - 15A 3 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | B315 |
| Series | BL |
| Amperage | 15A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 14-10 AWG (Cu), 12-10 AWG (Al) |
| Max Wire | 10 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
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Description
The Siemens B315 is a miniature circuit breaker designed for commercial distribution. As part of the BL series, it provides dependable thermal-magnetic protection for 240V three-phase applications. This unit installs into Siemens P1 through P5 panelboards using a standard bolt-on connection. It serves as a functional equivalent to BAB3015 and QOB315 breakers when matching specifications. Rated at 10 kAIC, it features long-time and instantaneous (LI) functions and is HACR rated.Specifications
| Brand | Siemens |
|---|---|
| Part Number | B315 |
| Series | BL |
| Amperage | 15A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 14-10 AWG (Cu), 12-10 AWG (Al) |
| Max Wire | 10 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
Product FAQs
6 answersWhat panelboards are compatible with the Siemens B315 breaker?
The B315 is designed to bolt directly into Siemens P1, P2, P3, P4, and P5 series commercial panelboards.
Is the Siemens B315 a direct replacement for the ITE B315?
Yes. Siemens acquired ITE, and the modern Siemens B315 is the exact, manufacturer-approved equivalent for the legacy ITE B315 and ITE Siemens B315 catalog numbers.
Can the B315 breaker be used with HVAC equipment?
Yes. This Type BL circuit breaker is HACR rated, ensuring it is tested and approved to handle the unique inrush currents of heating, air conditioning, and refrigeration equipment.
Are the trip settings adjustable on the Siemens B315?
No. This unit utilizes a fixed thermal magnetic trip mechanism, meaning the long-time and instantaneous overcurrent thresholds cannot be modified in the field.
Does the B315 clip onto a DIN rail?
No, this unit features a standard bolt-on connection style. It secures directly to the panel bus using threaded hardware for a permanent connection, rather than snapping into place.
What does the LI trip function code mean on the B315?
The LI designation indicates the breaker provides both Long-Time and Instantaneous protection. The thermal mechanism protects against sustained overloads, while the magnetic mechanism trips immediately during a short circuit.
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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