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Eaton / Westinghouse EHB3090 Molded Case Circuit Breaker
- 90A
- 3 Pole
- Bolt-On
Eaton / Westinghouse
EHB3090
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
EHB3090
Quantity
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Eaton / Westinghouse EHB3090 - 90A 3 Pole Molded Case Circuit Breaker
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Description
A drop-in solution for aging infrastructure, the Eaton EHB3090 is a 3-pole, 90A molded case circuit breaker designed for 480Y/277VAC systems. It provides essential thermal-magnetic trip functions for commercial applications. This unit mounts into legacy Westinghouse panelboards, offering an exact fit that eliminates retrofitting. Rated at 65kAIC at 240V and 14kAIC at 480Y/277V, it meets rigorous safety standards and remains critical for maintaining existing electrical distribution networks.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | EHB3090-R |
| Series | EHB |
| Amperage | 90A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 14kA @ 480Y/277VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse Panelboards |
| Wire Gauge | 4-2/0 AWG (Cu/Al) |
| Max Wire | 2/0 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 |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Visual Trip Indicator, Quick-Make/Quick-Break, Trip-Free Mechanism |
Product FAQs
6 answersWhat panelboards are compatible with the EHB3090 circuit breaker?
The EHB3090 is a legacy E-Frame breaker designed specifically for older Westinghouse bolt-on panelboards. It is not intended for modern Eaton Pow-R-Line panels, which typically require current F-Frame or Series G breakers.
What is the direct replacement for the obsolete Westinghouse EHB3090?
The EHB series has been discontinued by Eaton. The official factory replacement is the F-Frame EHD3090, which provides the identical 90-amp, 3-pole configuration and thermal-magnetic protection for legacy infrastructure.
What are the conductor requirements for the EHB3090 load lugs?
The factory-installed load lugs accept copper (Cu) or aluminum (Al) wire ranging from 4 AWG to 2/0 AWG. Installers must ensure proper torque is applied to the terminals to maintain a secure and code-compliant connection.
How does the interrupting rating (AIC) of the EHB3090 scale with system voltage?
The breaker provides a standard interrupting capacity of 14kA when applied to 480V or 277V AC systems. When installed in 240V AC applications, the fault current rating increases to 65kA.
How does the LI trip function operate on the EHB3090?
The breaker utilizes a fixed thermal-magnetic trip unit. The thermal element (Long-Time) protects against sustained overloads by heating a bimetallic strip, while the magnetic element (Instantaneous) provides immediate tripping during severe short circuits.
Can the trip settings on the EHB3090 be adjusted in the field?
No, the EHB3090 features a fixed thermal and fixed magnetic trip unit. The trip curve is factory-calibrated for 90-amp applications and cannot be modified or swapped by the user.
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Reviews
Review summary
Customers rate this product 4.8 out of 5 based on 19 reviews.
Total 5 star reviews: 16 Total 4 star reviews: 3 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
19 reviews
- TSThomas S.Verified BuyerReviewingSquare D EHB24060 - 60A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/28/26President NGE
The quality is excellent, but you need to double check when you order that the corrected one gets delivered
- MDMitchell D.Verified BuyerReviewingSquare D EHB14020HID - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars2/4/26Hard to find
Super breakers has just what I was looking for when no one else did!!
- MSMike S.Verified BuyerReviewingSquare D EHB34060 - 60A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars11/21/25Fast reliable service, reasonable prices
I recently ordered the incorrect breakers for a job, but I contacted Drew at SuperBreakers and he got me the correct breakers shipped out that day, which I received the next day. He sent me a label to send the wrong breakers back, and I was quickly refunded a restocking fee that I incurred for my mistake. I was able to get the breakers installed, and the power running to meet the deadline. Not to mention, the price was better than I found elsewhere. Thanks Drew!
I would definitely recommend this company if you need fast, reliable service for your electrical product needs. And I'm sure I will use them again.
Thank you SuperBreakers! Nice job Drew!
- DTDavid T.ReviewingSquare D EHB14020 - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars12/12/23Everything worked out perfect thanks
Everything worked out perfect thanks again
- GCGULF C.ReviewingSquare D EHB34020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/5/23Perfect condition
This breaker arrived as advert and timely. Perfect condition. Good working condition