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Eaton / Cutler-Hammer LA3175 Molded Case Circuit Breaker
- 175A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
LA3175
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
LA3175
Quantity
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Eaton / Cutler-Hammer LA3175 - 175A 3 Pole Molded Case Circuit Breaker
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Description
Built for demanding industrial environments, this 175A, 3-pole breaker delivers robust thermal-magnetic protection. The LA3175 is a legacy L-Frame component designed to defend commercial electrical systems against overloads and short circuits. Designed for bolt-on installation, it fits perfectly into Westinghouse PRL4 panelboards and motor control centers. For facilities upgrading their infrastructure, this unit is commonly replaced by the newer Series C LD3175 breaker.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | LA3175 |
| Series | LA |
| Amperage | 175A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | LA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Westinghouse PRL4 Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 1 AWG - 600 kcmil (Al/Cu) or (2) 1 AWG - 250 kcmil (Al/Cu) |
| Max Wire | 600 kcmil |
| Min Wire | 1 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 | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Interchangeable Trip Unit |
Product FAQs
6 answersWhich panelboards are compatible with the LA3175 circuit breaker?
The LA3175 is designed for bolt-on installation in legacy Westinghouse PRL4 panelboards, switchboards, and motor control centers.
What wire sizes are accepted by the standard lugs on the LA3175?
The standard lugs can accommodate a single 1 AWG to 600 kcmil aluminum or copper wire, or dual 1 AWG to 250 kcmil aluminum or copper wires per phase.
Can the Eaton LA3175 be used in DC electrical systems?
Yes, this breaker is rated for use in 250VDC applications and provides an interrupting capacity of 10kAIC for direct current systems.
How does the trip unit on the LA3175 operate?
It utilizes a thermal-magnetic trip unit that provides a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short-circuit protection.
Is the Eaton LA3175 the same as the Westinghouse LA3175?
Yes. Eaton acquired the Westinghouse distribution equipment business, so the LA3175 is the exact same legacy L-Frame breaker, now supported under the Eaton and Cutler-Hammer brands.
What is the modern replacement for the legacy LA3175 breaker?
For facilities upgrading their electrical infrastructure, the legacy LA3175 is commonly superseded by the newer Eaton Series C LD3175 circuit breaker.
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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?