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Eaton / Westinghouse E1040 Molded Case Circuit Breaker
- 40A
- 1 Pole
- Bolt-On
Eaton / Westinghouse
E1040
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
E1040
Quantity
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Eaton / Westinghouse E1040 - 40A 1 Pole Molded Case Circuit Breaker
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Description
A dependable solution for commercial power management, this 40-amp single-pole breaker provides essential overcurrent protection. It mounts into standard Eaton and legacy Westinghouse panelboards, offering an exact fit for older E-Frame installations. With a 7kAIC rating at 120VAC and support for 125VDC applications, this bolt-on MCCB ensures safe operation. It features fixed thermal-magnetic trip functions and shares cross-reference compatibility with EHD1040 and EB1040 models.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | E1040-R |
| Series | E |
| Amperage | 40A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 125VDC |
| Phase | 1 |
| AIC Rating | 7kA @ 120VAC, 5kA @ 125VDC |
| Frame Type | E |
|---|---|
| Terminal Type | Lugs |
| For Use With | Westinghouse Panelboards, Eaton 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 |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
Product FAQs
5 answersWhich panelboards accept the E1040 circuit breaker?
This bolt-on breaker mounts directly into legacy Westinghouse and standard Eaton panelboards configured for E-Frame installations.
Are there alternative catalog numbers that replace the E1040?
Yes, the EHD1040 and EB1040 are direct cross-reference replacements. They share the same 1-pole, 40-amp E-Frame profile and bolt-on mounting configuration.
What wire sizes are supported by the E1040 terminals?
The breaker includes lugs that accommodate 14 AWG through 1/0 AWG conductors. The terminals are rated for both copper and aluminum wiring.
Is the E1040 suitable for DC voltage systems?
Yes, this breaker supports 125VDC applications with a 5kAIC interrupting rating, making it suitable for specific direct current control and power circuits.
Does the E1040 offer adjustable trip settings?
No, this breaker features a non-interchangeable thermal-magnetic trip unit with fixed long-time and instantaneous (LI) functions.
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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