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Eaton / Cutler-Hammer LA3175PR Molded Case Circuit Breaker
- 175A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
LA3175PR
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
LA3175PR
Quantity
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Eaton / Cutler-Hammer LA3175PR - 175A 3 Pole Molded Case Circuit Breaker
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Description
Delivering exceptional short-circuit protection, this 175A Tri-Pac breaker utilizes integrated current-limiting fuses alongside a traditional thermal-magnetic trip unit. The L-Frame architecture includes an interchangeable trip mechanism. Engineered for bolt-on mounting, it fits into Westinghouse PRL4 panelboards and switchboards. While often substituted by the LCL3175, this exact match is ideal for legacy motor control centers.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | LA3175PR-R |
| Series | LA |
| Amperage | 175A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480VAC, 200kA @ 600VAC, 100kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse PRL4 Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 4 AWG-350 kcmil (Al/Cu) |
| Max Wire | 350 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 | Current Limiting Fuses, Lugs |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, Fused, Interchangeable Trip Unit |
| Special Features | Current Limiting (Integrally Fused) |
Product FAQs
5 answersWhat panelboards are compatible with the LA3175PR circuit breaker?
This bolt-on L-frame breaker is designed for use in legacy Westinghouse PRL4 panelboards, switchboards, and motor control centers.
Are Eaton, Cutler-Hammer, and Westinghouse LA3175PR breakers interchangeable?
Yes. Eaton acquired the Westinghouse distribution equipment division. Breakers marked with the LA3175PR catalog number under the Eaton, Cutler-Hammer, or Westinghouse brands are physically and electrically identical.
What does the PR suffix mean in the LA3175PR catalog number?
The PR suffix indicates that this is a Tri-Pac fused current-limiting breaker. It combines a standard thermal-magnetic trip unit with integral current-limiting fuses to achieve a high interrupting rating of 200kA at 600VAC.
How do I set the trip unit on the LA3175PR?
This breaker features a fixed thermal overload set at 175A and an adjustable magnetic short-circuit trip. The magnetic trip can be adjusted between 875A and 1750A using the dials on the face of the trip unit, allowing you to coordinate with motor inrush currents and prevent nuisance tripping.
Is the LA3175PR the same size as a standard LA3175 breaker?
No. Because the LA3175PR is a Tri-Pac breaker with integral current-limiting fuses, it requires more vertical space. The LA3175PR measures 16 inches high, which is taller than a standard non-fused LA breaker. Verify that your enclosure has adequate space before attempting a direct replacement.
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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?