Eaton / Westinghouse JA3150W Molded Case Circuit Breaker
- 150A
- 3 Pole
- Bolt-On
Eaton / Westinghouse
JA3150W
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
JA3150W
Quantity
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Eaton / Westinghouse JA3150W - 150A 3 Pole Molded Case Circuit Breaker
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Description
Industrial facilities relying on classic Westinghouse gear can utilize the Eaton JA3150W to maintain operations. This 150A, three-pole molded case circuit breaker features a bolt-on mounting style for secure connections in high-vibration environments. Delivered without terminal lugs, it accommodates custom wiring configurations in legacy switchboards and panelboards. It offers a 22kAIC rating at 480VAC, ensuring reliable fault clearing for commercial electrical networks.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Series | JA |
| Amperage | 150A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 22kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse Panelboards, Switchboards, Motor Control Centers |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Auxiliary Switch, Shunt Trip, Undervoltage Release, Lug Kits |
|---|---|
| Accessories | None (Lugs not included) |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
Product FAQs
6 answersIs the Westinghouse JA3150W still manufactured?
No, the Westinghouse JA3150W is an obsolete legacy J-frame breaker. Eaton, which acquired the Westinghouse distribution equipment division, recommends the Series C KDB3150W as the modern replacement.
Can I install a modern Eaton replacement in place of the JA3150W in an existing panel?
Yes, but because the modern Series C K-frame (like the KDB3150W) has different physical dimensions than the legacy J-frame, you will typically need a retrofit kit, such as the KCDPKDB for CDP panelboards, to adapt the bus connections and mounting space.
What types of enclosures or panels is the JA3150W compatible with?
The JA3150W is designed for use in vintage Westinghouse panelboards, switchboards, and motor control centers that accept legacy J-frame bolt-on breakers.
What does the LI trip function mean on the JA3150W?
The LI designation indicates the breaker is equipped with a thermal magnetic trip unit providing Long-Time (L) protection for overloads and Instantaneous (I) protection for short circuits. The thermal element is fixed, while the magnetic trip is adjustable.
Are Cutler-Hammer and Eaton JA3150W breakers the same as the Westinghouse version?
Yes. After Eaton acquired the Westinghouse distribution and control business in 1994, they continued manufacturing the same legacy frames under the Cutler-Hammer and Eaton brands. A JA3150W branded as Eaton or Cutler-Hammer is physically and electrically identical to the original Westinghouse model.
Does the JA3150W require special mounting hardware?
The JA3150W features a standard bolt-on connection. When installing it in a vintage panelboard, you will generally need to retain the original bus mounting screws from the enclosure, as they are specific to the panel's busbar configuration.
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Reviews
Review summary
Customers rate this product 4.5 out of 5 based on 2 reviews.
Total 5 star reviews: 1 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
2 reviews
- SMScott M.ReviewingEaton / Cutler-Hammer JA3125 - 125A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars5/4/23Great Service!!
We needed screws to attach the breaker to the buss and they included them along with other mounting hardware. Made installation much easier!
Fast shipping too!!
- MGMichael G.ReviewingEaton / Cutler-Hammer JA3175 - 175A 3 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars3/22/23Good deal just make sure
Good deal just make sure your prepared to provide line side lugs if needed