Eaton / Westinghouse LA2300 Molded Case Circuit Breaker
- 300A
- 2 Pole
- Unit Mount
Quantity
Eaton / Westinghouse LA2300 - 300A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Serving as a vital component for facility maintenance, the Eaton LA2300 is a 300A, 2-pole legacy molded case circuit breaker delivering dependable thermal-magnetic protection. It mounts into classic Westinghouse panelboards and Eaton switchboards. Choosing this original L-frame design bypasses the retrofit hardware necessary if using the newer LD2300. Capable of interrupting 42kA at 240V, the device features an adjustable magnetic trip and an interchangeable trip unit for flexible integration.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | LA2300-R |
| Series | LA |
| Amperage | 300A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 20kA @ 250VDC |
| Frame Type | LA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Westinghouse Panelboards, Eaton Pow-R-Line 4 Panelboards, Switchboards |
| 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 | Lugs |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Interchangeable Trip Unit, 2-Pole in 3-Pole Housing |
Product FAQs
8 answersWhat panelboards are compatible with the LA2300 circuit breaker?
The LA2300 is designed for use in legacy Westinghouse panelboards, Eaton Pow-R-Line 4 panelboards, and compatible switchboards that accept LA frame unit mount breakers.
Is the LA2300 interchangeable with Eaton and Cutler-Hammer LA breakers?
Yes. Eaton acquired the Westinghouse distribution equipment division, so LA2300 breakers branded as Westinghouse, Cutler-Hammer, or Eaton are physically and electrically identical. They can be used interchangeably in the same LA frame applications.
What wire sizes and materials are supported by the standard lugs on this breaker?
The standard load side lugs accept either one 1 AWG to 600 kcmil wire or two 1 AWG to 250 kcmil wires. These terminals are rated for both aluminum and copper conductors.
How does the adjustable magnetic trip function work on the LA2300?
This breaker features an interchangeable thermal-magnetic trip unit with a fixed thermal element for long-time overload protection and an adjustable magnetic element. The magnetic dial allows electricians to set the instantaneous short-circuit trip threshold to coordinate with other devices in the system.
Does this breaker mount onto a DIN rail or plug into a busbar?
No. The LA2300 is a unit mount, bolt-on circuit breaker. It must be bolted directly to the panelboard chassis or mounting pan rather than plugging into a busbar or snapping onto a DIN rail.
Can this 2-pole breaker be used in a DC circuit?
Yes, the LA2300 is rated for up to 250VDC with a 20kA interrupting capacity. When installing in DC applications, ensure the wiring configuration complies with the manufacturer guidelines for DC switching.
Are the trip units on the LA2300 replaceable?
Yes, the LA2300 features an interchangeable trip unit design. This allows panel builders to swap the thermal-magnetic trip unit for a different rating within the LA frame without replacing the entire breaker base.
What does the 30kAIC at 480V rating indicate for system safety?
The 30kAIC rating means the breaker can safely interrupt up to 30,000 amps of fault current at 480V AC without sustaining catastrophic damage. You must verify that the available fault current at the installation point does not exceed this value to maintain a safe electrical system.
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.
- 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?