Free Shipping Over $99
Eaton / Cutler-Hammer LA3300PR Molded Case Circuit Breaker
- 300A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
LA3300PR
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
LA3300PR
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Eaton / Cutler-Hammer LA3300PR - 300A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Similar Items
200A 3 Pole Molded Case Circuit Breaker
175A 3 Pole Molded Case Circuit Breaker
Description
Built for demanding industrial environments, this 300-amp Eaton Tri-Pac MCCB features specialized current-limiting technology. It pairs standard thermal-magnetic protection with internal fuses to rapidly clear high-level short circuits. This unit bolts into Westinghouse and Cutler-Hammer motor control centers. Facilities can also transition to the Series C LCL3300 equivalent. Boasting a 200 kAIC rating at 600V, it ensures reliable performance while drastically reducing let-through energy.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | LA3300PR-R |
| Series | LA |
| Amperage | 300A |
| 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 | 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 | Current Limiting Fuses, Lugs |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Interchangeable Trip Unit, Current Limiting, Fused, Tri-Pac |
| Special Features | Current Limiting (Integrally Fused) |
Product FAQs
8 answersWhat equipment is compatible with the LA3300PR breaker?
This bolt-on L-Frame breaker is designed for installation in Eaton, Cutler-Hammer, and legacy Westinghouse panelboards, switchboards, and motor control centers.
How does the LA3300PR achieve its high 200kA interrupting capacity?
It utilizes a Tri-Pac integrally fused design. This current-limiting technology pairs standard thermal-magnetic protection with internal fuses to rapidly clear high-level short circuits and reduce let-through energy.
What is the magnetic trip adjustment range for the LA3300PR?
The instantaneous magnetic trip function is adjustable from 1500 to 3000 amps, allowing panel builders to coordinate short-circuit protection with downstream devices.
What wire sizes do the standard lugs accommodate?
The included lugs accept either a single 4 AWG to 600 kcmil conductor or dual 3/0 AWG to 250 kcmil conductors. They are rated for both aluminum and copper wiring.
Can I use this to replace a legacy Westinghouse LA3300PR?
Yes. Eaton acquired the Westinghouse distribution equipment line, making the Eaton, Cutler-Hammer, and Westinghouse LA3300PR models exact physical and electrical matches.
Is there a newer Series C equivalent for the LA3300PR?
Yes, facilities looking to upgrade or transition to the Eaton Series C family can use the LCL3300 current-limiting circuit breaker as a modern equivalent.
How does the current-limiting feature protect downstream equipment?
By utilizing internal fuses, the breaker clears massive faults faster than standard mechanical contacts can open. This drastically limits the peak let-through current and thermal energy, reducing mechanical stress on the protected circuit.
Is the LA3300PR suitable for DC power systems?
Yes, in addition to its AC ratings, this breaker is rated for 250VDC applications with a 100kA interrupting capacity, making it suitable for heavy industrial DC circuits.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
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
Search
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?