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Eaton / Westinghouse E2040 Molded Case Circuit Breaker
- 40A
- 2 Pole
- Bolt-On
Eaton / Westinghouse
E2040
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
E2040
Quantity
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Eaton / Westinghouse E2040 - 40A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
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Quantity
Eaton / Westinghouse E2040 - 40A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | E2040 |
| Series | E |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 125/250VDC |
| Phase | 1 |
| AIC Rating | 7kA @ 240VAC, 5kA @ 125/250VDC |
| Frame Type | E |
|---|---|
| Terminal Type | Lugs |
| For Use With | Westinghouse Panelboards, Eaton Pow-R-Line Panelboards, AB De-Ion Panels |
| 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, Undervoltage Release, Auxiliary Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Standard Interrupting Capacity, Non-Interchangeable Trip |
Quantity
Eaton / Westinghouse E2040 - 40A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | E2040-R |
| Series | E |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 125/250VDC |
| Phase | 1 |
| AIC Rating | 7kA @ 240VAC, 5kA @ 125/250VDC |
| Frame Type | E |
|---|---|
| Terminal Type | Lugs |
| For Use With | Westinghouse Panelboards, Eaton Pow-R-Line Panelboards, AB De-Ion Panels |
| 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, Undervoltage Release, Auxiliary Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Standard Interrupting Capacity, Non-Interchangeable Trip |
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Description
Engineered for older electrical systems, this 40A molded case circuit breaker operates at 240VAC to deliver consistent thermal-magnetic protection. It is essential for facilities running legacy hardware. The breaker mounts into Westinghouse, AB De-Ion, and Eaton Pow-R-Line panelboards via a secure bolt-on connection. It acts as a cross-reference for EB2040 units and can be upgraded to the EHD2040 model. Featuring a 7 kAIC rating, it includes non-interchangeable trip units and is HACR rated.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | E2040-R |
| Series | E |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 125/250VDC |
| Phase | 1 |
| AIC Rating | 7kA @ 240VAC, 5kA @ 125/250VDC |
| Frame Type | E |
|---|---|
| Terminal Type | Lugs |
| For Use With | Westinghouse Panelboards, Eaton Pow-R-Line Panelboards, AB De-Ion Panels |
| 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, Undervoltage Release, Auxiliary Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Standard Interrupting Capacity, Non-Interchangeable Trip |
Product FAQs
6 answersWhich panelboards are compatible with the E2040 circuit breaker?
This breaker is designed to bolt directly into legacy Westinghouse, AB De-Ion, and Eaton Pow-R-Line panelboards.
Is the Westinghouse E2040 obsolete, and what is the modern replacement?
Yes, the original E2040 is a legacy E-frame breaker. For modern upgrades, the Eaton EHD2040 serves as a direct replacement in compatible panelboards.
Can the E2040 be used to replace older EB2040 breakers?
Yes, the E2040 acts as a direct cross-reference and drop-in replacement for legacy EB2040 circuit breakers.
Is the E2040 rated for direct current (DC) systems?
Yes, in addition to its 240VAC rating, this breaker is rated for 125/250VDC applications with a 5kAIC interrupting capacity.
Are the lugs on the E2040 rated for aluminum wire?
Yes, the standard lugs are dual-rated for both copper and aluminum conductors, accepting wire sizes from 14 AWG up to 1/0 AWG.
Is the E2040 HACR rated for HVAC applications?
Yes, this breaker is HACR rated, making it suitable for use with heating, air conditioning, and refrigeration equipment.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 25 reviews.
Total 5 star reviews: 24 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 30 most recent customer reviews
Last updated 8/15/25
Customers say this electrical breaker meets their expectations in terms of functionality and performance. Many reviews mention quick delivery times and competitive pricing. While one user reports voltage detection issues, most find these units work effectively. Common feedback includes satisfaction with product condition upon arrival and straightforward installation. Reviews indicate availability of specialty models that are often hard to find through local suppliers.
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Rating
25 reviews
- MGMike G.Rated 5 out of 5 stars11/27/23Just what we needed and
Just what we needed and fast shipping
- TETimothy E.ReviewingSquare D HU364 Safety SwitchI recommend this productRated 5 out of 5 stars5/9/22quick response!!!!
quick response!!!!
- DGDavid G.ReviewingSquare D HU362 Safety SwitchI recommend this productRated 5 out of 5 stars4/13/22Great service and fast shipping
Great service and fast shipping
- WEWarren E.ReviewingSquare D HU361 Safety SwitchI recommend this productRated 5 out of 5 stars3/1/22600v Disconnect
They have GREAT Inventory! Even my Local suppliers did not have them in stock.
- SKSaki K.ReviewingSquare D HU361 Safety SwitchI recommend this productRated 5 out of 5 stars2/20/22Good product
Good product in good price