Siemens B12000S07 Molded Case Circuit Breaker
- 20A
- 1 Pole
- Bolt-On
Quantity
Siemens B12000S07 - 20A 1 Pole Molded Case Circuit Breaker
New
Quantity
Description
Designed around the BL frame, this 20A single-pole breaker features a specialized 24VAC factory-installed shunt trip for low-voltage control circuits. It provides essential overcurrent protection for commercial and industrial environments requiring automated disconnects. This model bolts into Siemens P1, P2, P3, P4, and P5 panelboards, providing a rigid and reliable bus connection. With a 10kAIC rating at 120/240VAC, it is also SWD and HACR rated to handle switching duty and HVAC equipment.Specifications
| Brand | Siemens |
|---|---|
| Series | BL |
| Amperage | 20A |
| 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 | 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 Thermal, Fixed Magnetic |
| Available Options | Auxiliary Switch, Alarm Switch, Padlock Attachment, Handle Tie |
|---|---|
| Accessories | Shunt Trip 24VAC (Factory Installed) |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Product FAQs
4 answersWhat does the S07 suffix mean in the B12000S07 catalog number?
The S07 suffix indicates that this breaker includes a factory-installed 24VAC shunt trip. This allows the breaker to be opened remotely using a 24V control signal, which is commonly used for emergency stop or automated shutdown applications.
Can I install the B12000S07 in a standard residential load center?
No. The B12000S07 is a bolt-on breaker designed specifically for Siemens P1, P2, P3, P4, and P5 commercial panelboards. It will not fit in standard residential load centers that require plug-in style breakers.
Can I use a standard Siemens B120 breaker instead of the B12000S07?
You can only substitute a standard B120 if your application does not require remote tripping. The B12000S07 includes a 24VAC shunt trip mechanism that the base B120 model lacks.
Does the B12000S07 require a separate control circuit for the shunt trip?
Yes. To utilize the factory-installed 24VAC shunt trip, you must provide a separate 24V control power source wired to the shunt trip mechanism on the breaker.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 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