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Eaton / Cutler-Hammer JA3175 Molded Case Circuit Breaker
- 175A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
JA3175
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
JA3175
Quantity
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Eaton / Cutler-Hammer JA3175 - 175A 3 Pole Molded Case Circuit Breaker
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175A 3 Pole Molded Case Circuit Breaker
175A 3 Pole Molded Case Circuit Breaker
Description
Designed for older industrial infrastructure, this 175-amp three-pole breaker utilizes proven thermal-magnetic technology to manage overcurrent events. It fastens into classic Westinghouse or Cutler-Hammer panelboards and motor control centers via a standard bolt-on mount. The device provides a 25kAIC rating at 240VAC alongside an adjustable magnetic trip for precise coordination. When panel upgrades are required, the JD3175 or JDB3175 serve as the modern equivalent for this specific frame.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | JA3175-R |
| Series | JA |
| Amperage | 175A |
| 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 |
| 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, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Interchangeable Trip Unit, High Interrupting Capacity |
Product FAQs
7 answersWhat equipment is the JA3175 circuit breaker designed to fit?
This legacy J-Frame breaker mounts into older Westinghouse and Cutler-Hammer panelboards, switchboards, and motor control centers that require a bolt-on connection.
How is the line side of the JA3175 connected?
As a bolt-on breaker, the line side bolts directly to the busbar of a compatible panelboard or switchboard. The breaker is supplied with lug terminals on the load side only.
What wire sizes are supported by the load-side terminals on the JA3175?
The included load-side lugs accept either aluminum or copper conductors ranging from 4 AWG to 350 kcmil.
How does the trip unit on the JA3175 operate?
It utilizes a thermal-magnetic trip mechanism (LI) that provides fixed thermal protection for long-time overloads and an adjustable magnetic setting for instantaneous short-circuit protection.
What is the purpose of the adjustable magnetic trip on the JA3175?
The adjustable magnetic trip allows electricians to fine-tune the instantaneous short-circuit response threshold, providing coordinated protection for specific loads like motors without altering the fixed 175-amp thermal overload limit.
Can the JA3175 replace older Westinghouse breakers?
Yes, this Eaton / Cutler-Hammer model is a direct replacement for obsolete Westinghouse JA-frame breakers with a 175-amp, 3-pole configuration.
Is the JA3175 interchangeable with modern Series C breakers?
No, the JA3175 is a legacy J-Frame breaker. Upgrading to a modern Series C KD or JDB frame breaker in an older Westinghouse panel typically requires a specific retrofit adapter kit or hardware modifications.
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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