Eaton / Westinghouse KA2150 Molded Case Circuit Breaker
- 150A
- 2 Pole
- Bolt-On
Quantity
Eaton / Westinghouse KA2150 - 150A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built to support legacy power distribution, the Eaton KA2150 is a vital component for maintaining older equipment. This 150-amp molded case circuit breaker delivers robust industrial performance while matching the exact dimensions of original installations. It integrates flawlessly into Westinghouse CDP and FDP panelboards. When replacing a failed unit, using this authentic KA frame avoids the deadfront cutting required by the modern KD2150 substitute. It provides a 22kAIC rating at 480VAC.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | KA2150-R |
| Series | KA |
| Amperage | 150A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 25kA @ 240VAC, 22kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | KA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Westinghouse CDP Panelboards, FDP 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, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release |
|---|---|
| Accessories | Load Side 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 answersWhat equipment is the KA2150 compatible with?
This KA frame breaker is designed for use in legacy Westinghouse CDP and FDP panelboards, as well as compatible switchboards and motor control centers.
What wire size is accepted by the load side lugs on the KA2150?
The standard load side lugs accept aluminum or copper wire ranging from 4 AWG to 350 kcmil.
Can the KA2150 be used in DC circuits?
Yes, this breaker is rated for DC applications up to 250VDC, providing a 10kA interrupting capacity for those systems.
Does the KA2150 feature an interchangeable trip unit?
Yes, this breaker utilizes an interchangeable thermal magnetic trip unit. This allows for field modifications if the required trip characteristics change within the KA frame limits.
Why is this breaker listed as both Eaton and Westinghouse?
Eaton acquired the Westinghouse distribution equipment line. The KA2150 is a legacy Westinghouse design that is now supported under the Eaton and Cutler-Hammer brands.
How is the KA2150 installed in a panelboard?
This is a bolt-on circuit breaker. It requires bolted connections to the panelboard bus, which is standard for CDP and FDP distribution panels.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 14 reviews.
- RFRon F.Verified BuyerReviewingSquare D KA36150 - 150A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/27/26Square D KA36150
As usual, on time and in great condition!
- SJShawn J.Verified BuyerReviewingSquare D KA36225 - 225A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/27/26I Line BreKER
Found exactly what I was looking for. They called and set over specs so I could confirm the fit!
- RFRon F.Verified BuyerReviewingSquare D KA36100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/9/26Multiple orders
I have purchased multiple breakers (of fairly large size) from SuperBreakers and their pricing has been excellent and the delivery time spot on. I would highly recommend them
- MFMatt F.Verified BuyerReviewingSquare D KA36100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/21/25Order Messed Up - Breaker Great
I have ordered many breakers through SuperBreakers with no issues until this order. I ordered this breaker and it wasn't shipped. I sent a message and was told that a mistake was make in shipping and that they would next day air the breaker to me. 5 days later (weekend in there) the breaker arrived. Not next day air, but shit happens. Sent the breaker still in the box out with my electrician and received a call from him that the breaker that was sent was a KAL36100 not the KA36100. I reached out to SuperBreakers and was told the correct breaker would be next day aired that day and I was emailed a shipping label to send back the incorrect one. This time it arrived the next day and was installed. This error cost my customer a couple days with out power to a dimmer cabinet and about 2 extra hours of labor, but all was okay in the end. Mistakes happen. The help and quick responses to my emails I received from Mike David showed me enough about this company. I look forward to my next order. Thank you for working this situation out in timely manor.
- JHJoel H.Verified BuyerReviewingSquare D KA36200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/5/25Worked As Planned
They had what we needed to match existing equipment, they shipped the same day and we put it right into service, no problems from first phone call to delivery and install.