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Eaton / Westinghouse EA3040 Molded Case Circuit Breaker
- 40A
- 3 Pole
- Bolt-On
Eaton / Westinghouse
EA3040
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
EA3040
Quantity
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Eaton / Westinghouse EA3040 - 40A 3 Pole Molded Case Circuit Breaker
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Description
Serving as a reliable solution for commercial facilities, the 40A Eaton EA3040 restores functionality to older electrical distribution systems. This three-pole molded case circuit breaker features standard thermal-magnetic trip technology for proven overload and short-circuit protection. Designed for seamless integration, it mounts into legacy Westinghouse CDP and FDP panelboards, as well as Eaton Pow-R-Line 3 enclosures. Facility managers can also use the EHD3040 as a modern substitute.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | EA3040-R |
| Series | EA |
| Amperage | 40A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 125/250VDC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC, 5kA @ 125/250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse CDP Panelboards, Westinghouse FDP Panelboards, Eaton Pow-R-Line 3 Panelboards |
| Wire Gauge | 14-1/0 AWG |
| 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 Included |
| Standards | NEMA AB-1, UL 489 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Standard Interrupting Capacity |
Product FAQs
5 answersWhich panelboards are compatible with the EA3040 circuit breaker?
The EA3040 is a bolt-on E-frame breaker designed for legacy Westinghouse CDP and FDP panelboards, as well as Eaton Pow-R-Line 3 systems. Verify your panel bus structure accepts E-frame breakers before installation.
Is there a direct replacement for the legacy EA3040 breaker?
Yes, the EA3040 is a legacy Westinghouse E-frame breaker that can be replaced by the newer Eaton EHD3040. The EHD3040 shares the same physical dimensions and mounting footprint for integration into older panelboards.
Can the EA3040 be used in DC electrical systems?
Yes, this breaker is rated for DC applications up to 125/250VDC with an interrupting capacity of 5kA. This makes it suitable for specific industrial control or battery systems requiring reliable thermal-magnetic protection.
What wire sizes are accepted by the lugs on the EA3040?
The factory-installed load side lugs on the EA3040 accept copper or aluminum wire ranging from 14 AWG to 1/0 AWG. Ensure proper torque specifications are followed during installation to maintain a secure connection.
What does the LI trip function indicate on the EA3040?
The LI designation means this thermal-magnetic breaker features fixed long-time for overload protection and fixed instantaneous for short-circuit protection. Neither the thermal nor the magnetic trip points are field-adjustable.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
Total 5 star reviews: 1 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
1 review
- CGClaudia G.Verified BuyerReviewingEaton / Westinghouse EA3030 - 30A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/20/26Good
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