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Eaton / Cutler-Hammer LA3500 Molded Case Circuit Breaker
- 500A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
LA3500
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
LA3500
Quantity
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Eaton / Cutler-Hammer LA3500 - 500A 3 Pole Molded Case Circuit Breaker
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Description
Built for commercial and industrial applications, the Eaton LA3500 is a 3-pole, 500A legacy L-Frame molded case circuit breaker. It delivers reliable thermal-magnetic protection with an interchangeable trip unit. This bolt-on unit installs into older Eaton and Westinghouse panelboards or motor control centers. It serves as a replacement for aging infrastructure and is superseded by the Series C LD3500. Rated for 30 kAIC at 480VAC, it features adjustable magnetic trip settings.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | LA3500-R |
| Series | LA |
| Amperage | 500A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton / Westinghouse Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | (2) 250-500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 250 kcmil |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Lugs |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Interchangeable Trip Unit |
Product FAQs
6 answersWhat is the modern replacement for the obsolete LA3500 circuit breaker?
The LA3500 has been superseded by the Eaton Series C LD3500. The LD3500 serves as a direct replacement for older L-Frame installations in existing Westinghouse and Cutler-Hammer equipment.
What equipment is the LA3500 designed to fit?
This bolt-on L-Frame breaker is engineered for compatibility with legacy Eaton, Cutler-Hammer, and Westinghouse panelboards, switchboards, and motor control centers.
What are the wire size requirements for the LA3500 lugs?
The standard lugs accept two cables per phase, accommodating 250 to 500 kcmil aluminum or copper wire.
How is the magnetic trip adjusted on this breaker?
The LA3500 features a thermal-magnetic trip unit with a fixed thermal element and an adjustable magnetic element. The instantaneous magnetic trip settings can be adjusted on the face of the trip unit to coordinate with downstream devices.
Is the trip unit on the LA3500 interchangeable?
Yes, the LA3500 features an interchangeable trip unit design, allowing the trip mechanism to be replaced or upgraded without removing the entire breaker frame from the panel.
Does the LA3500 support DC voltage applications?
Yes, in addition to its AC ratings, this breaker is rated for 250VDC systems with a 10kA interrupting capacity.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 13 reviews.
Total 5 star reviews: 13 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
13 reviews
- RGRobert G.Verified BuyerReviewingSquare D LA36400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/16/26LA36400
Perfectly boxed and arrived on time. Thanks for the shirt and stickers as well.
- CECraig E.Verified BuyerReviewingEaton / Cutler-Hammer LA3600 - 600A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/13/25Westinghouse breaker
Excellent customer service and quick shipping
- CLClifton L.Verified BuyerReviewingSquare D LA36400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/30/25estimator
Good
- BCBenjamin C.Verified BuyerReviewingEaton / Cutler-Hammer LA3225 - 225A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/4/25Refurbished Breaker
Breaker seems to be working great, no complaints from Client
- JMJerry M.ReviewingEaton / Cutler-Hammer LA3400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/14/23Where is my breaker?
Where is my breaker?