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Siemens EH1B020 Molded Case Circuit Breaker
- 20A
- 1 Pole
- Bolt-On
Siemens
EH1B020
Molded Case Circuit Breaker
Brand
Siemens
SKU
EH1B020
Quantity
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Siemens EH1B020 - 20A 1 Pole Molded Case Circuit Breaker
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Description
Built for commercial and industrial applications, the Siemens EH1B020 is a 1-pole E-Frame molded case circuit breaker. It provides reliable overcurrent protection for 277VAC systems. This bolt-on MCCB installs into Siemens P1, P2, P3, and older ITE panelboards, serving as a replacement for legacy models. Featuring a fixed thermal-magnetic trip unit, it delivers a 10kAIC rating. The non-interchangeable trip design ensures consistent performance, and the lugs accept 14-1/0 AWG wire.Specifications
| Brand | Siemens |
|---|---|
| Part Number | EH1B020-R |
| Series | EH |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 277VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 277VAC |
| Frame Type | EH |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards, ITE Panelboards |
| Wire Gauge | 14-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 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, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
Product FAQs
6 answersWhich panelboards are compatible with the Siemens EH1B020?
This molded case circuit breaker mounts directly into Siemens P1, P2, and P3 series lighting and distribution panelboards. It is also backward compatible with legacy ITE panelboards that accept EH frame breakers.
Does the EH1B020 breaker plug in or bolt on to the panel bus?
It features a bolt-on connection. Bolt-on breakers provide a secure, reliable mechanical attachment to the panelboard bus, which is typically required in commercial and industrial environments to prevent loosening from vibration over time.
What is the primary application for a single-pole 277VAC breaker?
A 1-pole 277VAC breaker is most commonly used to protect commercial and industrial lighting circuits fed from a 480Y/277V three-phase system.
Can I use the Siemens EH1B020 to replace an older ITE EH1-B020?
Yes. Siemens acquired ITE and integrated their product lines. The Siemens EH1B020 is the direct manufacturer replacement for the legacy ITE EH1-B020 or EH1B020 catalog numbers.
How does the wire capacity of the EH1B020 support commercial lighting circuits?
The factory-installed lugs accept a broad range of conductors from 14 AWG up to 1/0 AWG for both copper and aluminum wire. This wide acceptance range simplifies installations where electricians must upsize conductors to mitigate voltage drop over long indoor or outdoor lighting runs.
Can I adjust the trip curve on the Siemens EH1B020?
No, this breaker utilizes fixed thermal and fixed magnetic elements for its long time and instantaneous (LI) protection functions. If your coordination study requires adjustable pickup or delay settings, you will need to step up to a breaker equipped with an electronic trip unit.
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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!!!