Eaton / Westinghouse LA3150PR Molded Case Circuit Breaker
- 150A
- 3 Pole
- Unit Mount
Quantity
Eaton / Westinghouse LA3150PR - 150A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for heavy-duty industrial applications, the Eaton LA3150PR is a 150A molded case circuit breaker from the legacy LA frame family. It features a Tri-Pac fused design for exceptional current-limiting capabilities. This unit-mount MCCB installs into older Westinghouse and Cutler-Hammer panelboards. It serves as an exact physical replacement, eliminating the need for adapter kits. Rated for 200 kAIC at 480VAC, it utilizes reliable thermal-magnetic trip technology.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | LA3150PR-R |
| Series | LA |
| Amperage | 150A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480VAC, 200kA @ 600VAC, 100kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse Panelboards, Switchboards (High AIC) |
| Wire Gauge | (1) 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 | Load Side Lugs Included |
| Standards | NEMA AB-1, UL 489 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, Fused, Interchangeable Trip Unit |
| Special Features | Current Limiting (Integrally Fused) |
Product FAQs
6 answersWhat does the "PR" in the LA3150PR catalog number indicate?
The "PR" designates this as a Tri-Pac current-limiting circuit breaker. It features an integrally fused design to provide high interrupting ratings within the standard LA frame footprint.
What are the wire size limits for the standard lugs on the LA3150PR?
The standard lugs accept either a single 1 AWG to 600 kcmil wire or dual 1 AWG to 250 kcmil wires per phase. Both aluminum and copper conductors are supported.
How is the trip unit adjusted on the LA3150PR?
This breaker utilizes a thermal-magnetic trip unit with a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short-circuit protection.
Will the LA3150PR fit in a modern Eaton Series C panelboard?
No. The LA3150PR is a legacy Westinghouse L-frame breaker designed for older Westinghouse and Cutler-Hammer panelboards and switchboards. Modern Series C enclosures require different mounting hardware or specific retrofit kits.
How does the current-limiting feature function on this breaker?
The integrally fused Tri-Pac design clears high-level faults faster than standard mechanical contacts. This restricts the peak let-through current, reducing thermal and mechanical stress on downstream electrical equipment during a severe short circuit.
Can I use the LA3150PR to replace a standard Westinghouse LA3150 breaker?
Yes, the LA3150PR shares the same physical dimensions and bolt-on mounting configuration as standard legacy Westinghouse LA-frame breakers. It serves as a direct physical replacement while offering higher interrupting capacity.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 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?