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Siemens B2100 Miniature Circuit Breaker
- 100A
- 2 Pole
- Bolt-On
Siemens
B2100
Miniature Circuit Breaker
Brand
Siemens
SKU
B2100
Quantity
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Siemens B2100 - 100A 2 Pole Miniature Circuit Breaker
New
Quantity
Quantity
Siemens B2100 - 100A 2 Pole Miniature Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | B2100 |
| Series | BL |
| Amperage | 100A |
| Poles | 2 |
| 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Sold out
Quantity
Siemens B2100 - 100A 2 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | B2100-R |
| Series | BL |
| Amperage | 100A |
| Poles | 2 |
| 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
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Description
Built to handle robust electrical loads, this 100A dual-pole breaker provides essential overcurrent and short-circuit protection. It utilizes thermal-magnetic trip technology for commercial facilities. This BL series component features a bolt-on configuration, installing securely into Siemens P1 through P5 panelboards. The lugs accept 4-1/0 AWG copper or 2-1/0 AWG aluminum wire. Operating at 120/240VAC, it provides a 10kAIC interrupting capacity and is HACR rated.Specifications
| Brand | Siemens |
|---|---|
| Part Number | B2100 |
| Series | BL |
| Amperage | 100A |
| Poles | 2 |
| 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Product FAQs
7 answersIs the Siemens B2100 a direct replacement for older ITE B2100 breakers?
Yes. Siemens acquired ITE and maintained the BL series product lines. The modern Siemens B2100 is a direct, UL-listed replacement for legacy ITE-branded B2100 bolt-on circuit breakers.
Which panelboards are compatible with the B2100 circuit breaker?
This Type BL bolt-on breaker is specifically designed for use in Siemens P1, P2, P3, P4, and P5 series commercial panelboards. It will not fit standard residential plug-on load centers.
What is the plug-in equivalent of the B2100 for residential load centers?
If you need a plug-in breaker for a standard Siemens EQ or ES series load center, you will need the Type QP plug-in equivalent, catalog number Q2100.
Are there versions of the B2100 with a higher interrupting rating?
Yes. If your panel requires a higher short-circuit rating than the standard 10kAIC, you can upgrade to the Type BLH catalog number B2100H (rated 22kAIC) or the Type HBL catalog number B2100HH (rated 65kAIC).
Is the B2100 breaker HACR rated?
Yes, this breaker is HACR rated, meaning it is certified for use with Heating, Air Conditioning, and Refrigeration equipment that requires reliable group motor protection.
How does a Type BL breaker secure to the busbar?
Type BL breakers like the B2100 use a bolt-on connection. They are mechanically and electrically fastened directly to the panelboard busbar using mounting screws. This prevents micro-arcing and provides a secure, stable connection for commercial workloads.
Can I adjust the trip settings on the B2100?
No. The B2100 features fixed thermal-magnetic trip elements for both long-time overload and instantaneous short-circuit protection. It does not have adjustable trip dials.
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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