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Siemens EH2B125 Molded Case Circuit Breaker
- 125A
- 2 Pole
- Bolt-On
Siemens
EH2B125
Molded Case Circuit Breaker
Brand
Siemens
SKU
EH2B125
Quantity
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Siemens EH2B125 - 125A 2 Pole Molded Case Circuit Breaker
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Description
Engineered for legacy power distribution, the Siemens EH2B125 delivers consistent performance in commercial facilities. This 2-pole, 125-amp molded case circuit breaker utilizes a bolt-on design for maximum stability under load. It is fully compatible with Siemens and ITE P1, E2, and F2 panelboards, offering a direct fit for aging infrastructure. With an interrupting capacity of 14 kAIC at 480VAC, it includes fixed thermal-magnetic trip units. The ED42B125 serves as its modern substitute.Specifications
| Brand | Siemens |
|---|---|
| Part Number | EH2B125 |
| Series | EH |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 10kA @ 250VDC |
| Frame Type | EH |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens / ITE Panelboards (Type E2, F2, P1) |
| Wire Gauge | 4-4/0 AWG (Cu/Al) |
| Max Wire | 4/0 AWG |
| Min Wire | 4 AWG |
| 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, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
Product FAQs
5 answersWhich panelboard types accept the EH2B125 bolt-on breaker?
This legacy E-Frame breaker is designed to bolt directly into Siemens and ITE Type E2, F2, and P1 panelboards.
What are the conductor requirements for wiring the EH2B125?
The breaker is equipped with standard lugs that accept 4 AWG to 4/0 AWG wire. It is compatible with both copper and aluminum conductors, allowing flexibility for branch or feeder circuit installations.
Is the EH2B125 suitable for direct current (DC) applications?
Yes. While commonly used in AC systems up to 480VAC, this breaker is also rated for 250VDC systems, where it provides a 10kA interrupting capacity.
Does the EH2B125 offer adjustable trip settings for selective coordination?
No, this breaker uses a standard thermal-magnetic trip unit with fixed long-time and fixed instantaneous (LI) functions. It does not support field-adjustable trip settings.
Is the EH2B125 part of a current Siemens product line?
No, the EH2B125 is a legacy molded case circuit breaker from the Siemens and ITE E-Frame family.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 7 reviews.
Total 5 star reviews: 7 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
7 reviews
- TSThomas S.Verified BuyerReviewingSiemens EH3B020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars11/6/25Great
Thanks
- JMJim M.ReviewingSiemens EH3B040 - 40A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars11/24/23They fit perfectly and saved
They fit perfectly and saved us a lot of money by being able to replace just these breakers
- KHKen H.ReviewingSiemens EH3B030 - 30A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars1/12/23Great service
Great service and products fast shipping
- JSJerry S.ReviewingSiemens / ITE EH3B070 - 70A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/20/22Great Price - Breakers Work Fine
My local Supplier was charging me three times the price for a breaker that i bought on super Breakers.
- MRMatt R.ReviewingSiemens EH3B020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/6/2020 Amp Breaker
Received item quickly and in great shape. Thank you!!!