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Eaton / Cutler-Hammer LA3350 Molded Case Circuit Breaker
- 350A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
LA3350
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
LA3350
Quantity
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Eaton / Cutler-Hammer LA3350 - 350A 3 Pole Molded Case Circuit Breaker
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Description
Operating as a critical safety component for industrial facilities, the Eaton LA3350 is a 350-amp molded case circuit breaker. It utilizes proven thermal-magnetic technology to interrupt damaging overloads on three-phase 600V systems. The bolt-on configuration is engineered for compatibility with legacy Cutler-Hammer and Westinghouse panelboards. Serving as an exact match for older L-Frame installations, it features a 30kA interrupting capacity at 480V and an interchangeable trip mechanism.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | LA3350-R |
| Series | LA |
| Amperage | 350A |
| 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 | (1) 4 AWG-600 kcmil (Al/Cu) or (2) 3/0 AWG-250 kcmil (Al/Cu) |
| Max Wire | 600 kcmil |
| Min Wire | 4 AWG |
| 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 answersWhich panelboards and switchboards are compatible with the LA3350?
This L-frame breaker is designed for use in legacy Westinghouse, Cutler-Hammer, and Eaton panelboards, switchboards, and motor control centers that accept bolt-on L-frame breakers.
Is the Eaton LA3350 a direct replacement for older Westinghouse LA3350 breakers?
Yes. Eaton acquired the Westinghouse distribution equipment line. A Cutler-Hammer or Eaton LA3350 is a direct, form-fit-function replacement for an original Westinghouse LA3350.
What wire sizes do the standard lugs on the LA3350 accept?
The standard lugs accept either a single 4 AWG to 600 kcmil aluminum or copper conductor, or dual 3/0 AWG to 250 kcmil conductors per phase.
How does the trip unit function on the LA3350?
The LA3350 features a thermal-magnetic trip unit with a fixed thermal element for overload protection and an adjustable magnetic element for short-circuit protection. The magnetic trip settings can be adjusted in the field to coordinate with other protective devices.
Does the LA3350 provide ground fault or short-time protection?
No. The LA3350 is a standard thermal-magnetic breaker with Long-Time and Instantaneous (LI) trip functions. It does not include built-in ground fault or short-time protection.
Are the trip units on the LA3350 interchangeable?
Yes, the LA frame features an interchangeable trip unit design. This allows the thermal-magnetic trip unit to be swapped or upgraded without replacing the entire breaker frame.
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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?