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Eaton / Westinghouse KB3175 Molded Case Circuit Breaker
- 175A
- 3 Pole
- Unit Mount
Eaton / Westinghouse
KB3175
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
KB3175
Quantity
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Eaton / Westinghouse KB3175 - 175A 3 Pole Molded Case Circuit Breaker
Re-Certified
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175A 3 Pole Molded Case Circuit Breaker
175A 3 Pole Molded Case Circuit Breaker
Description
Manufactured for heavy commercial applications, this 175-amp K-frame breaker provides essential overcurrent and short-circuit defense. The robust thermal-magnetic mechanism ensures consistent performance across demanding three-phase networks. This unit mount configuration is engineered to fit classic Westinghouse motor control centers and Eaton Series C panelboards. When a modern equivalent is required, the KD3175 serves as the designated replacement.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | KB3175-R |
| Series | KB |
| Amperage | 175A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| 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, Eaton Series C Panelboards |
| Wire Gauge | 4 AWG - 350 kcmil (Cu/Al) |
| 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, W-C-375b |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Interchangeable Trip |
Product FAQs
7 answersIs the Westinghouse KB3175 still manufactured, or is there a direct replacement?
The KB3175 is a legacy K-frame breaker. When a modern equivalent is required for new installations or upgrades, the Eaton KD3175 serves as the designated replacement.
What types of enclosures and panels are compatible with the KB3175?
This unit mount breaker is designed for installation in classic Westinghouse panelboards, switchboards, and motor control centers, as well as modern Eaton Series C panelboards.
What wire sizes and materials are accepted by the standard lugs on the KB3175?
The standard lugs accept wire gauges from 4 AWG up to 350 kcmil and are rated for both copper and aluminum conductors.
Does the KB3175 support DC voltage applications?
Yes, in addition to its AC ratings up to 600VAC, this breaker is rated for 250VDC systems with an interrupting capacity of 10kA.
What type of trip unit is equipped on the KB3175?
It features a thermal magnetic trip unit with Long-Time and Instantaneous (LI) functions. The thermal element is fixed, while the magnetic trip is adjustable to allow for fine-tuning short-circuit protection.
How does the KB3175 mount into a panel?
This is a unit mount, or bolt-on, circuit breaker. It bolts directly to the panel bus or mounting pan rather than snapping into place, ensuring a secure connection for industrial applications.
How does the interrupting capacity of the KB3175 change across different AC voltages?
The breaker provides a maximum interrupting capacity of 25kA at 240VAC. This rating scales down as the voltage increases, offering 22kA at 480VAC and 14kA at 600VAC.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 3 reviews.
Total 5 star reviews: 3 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
3 reviews
- DHDavid H.ReviewingEaton / Cutler-Hammer KB3100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/21/23very easy to order and
very easy to order and received order promptly
- KLKelsee L.ReviewingEaton / Cutler-Hammer KB3250 - 250A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars5/29/21Excellent
Excellent
- BSBill S.ReviewingEaton / Cutler-Hammer KB3200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/26/19electrical contractor
no hassle, good product that has been recertified. very satisfied with the result!