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Siemens EH3B020 Molded Case Circuit Breaker
- 20A
- 3 Pole
- Bolt-On
Siemens
EH3B020
Molded Case Circuit Breaker
Brand
Siemens
SKU
EH3B020
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Siemens EH3B020 - 20A 3 Pole Molded Case Circuit Breaker
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Description
Built for commercial and industrial power distribution, the Siemens EH3B020 is a 3-pole, 20-amp molded case circuit breaker. It features a bolt-on mounting style designed for seamless integration into Siemens P1, P2, P3, and older ITE panelboards. As a legacy E-Frame device, it serves as an exact fit for existing installations and is officially replaced by the ED43B020 for newer upgrades. Rated at 14 kAIC at 480VAC, it provides fixed thermal and magnetic trip functions.Specifications
| Brand | Siemens |
|---|---|
| Part Number | EH3B020-R |
| Series | EH |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 10kA @ 250VDC |
| 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 |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
Product FAQs
6 answersIs there a modern replacement for the EH3B020?
Yes. The EH3B020 is a legacy E-frame breaker. For new installations or system upgrades, Siemens offers the ED43B020 as the direct functional replacement for 20A, 3-pole, 480VAC applications.
What panelboards are listed to accept the EH3B020?
This commercial-grade breaker is designed to bolt directly into Siemens P1, P2, and P3 series panelboards. It is also fully compatible with legacy ITE distribution panels that support E-frame breakers.
Are terminal lugs included, and what are their wire size capacities?
Yes, load-side lugs are included. They are rated for copper or aluminum (Cu/Al) conductors, accepting wire gauges from 14 AWG to 1/0 AWG.
Is the EH3B020 approved for use in DC distribution?
Yes. In addition to its AC interrupt ratings, the thermal-magnetic trip unit is rated for 250VDC circuits with a maximum interrupting capacity of 10kA.
What specific fault protection does the LI trip unit provide?
The fixed thermal-magnetic (LI) trip unit offers Long-Time and Instantaneous functions. The thermal element trips on sustained overcurrents, while the magnetic element clears short circuits instantly.
How does the EH3B020 mount to the panelboard?
It utilizes a bolt-on mounting configuration. It physically bolts to the panelboard busbars for a secure, low-resistance connection, rather than utilizing a plug-on or clip-in connection.
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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!!!