Square D KC341751021 Molded Case Circuit Breaker
- 175A
- 3 Pole
- I-Line
Quantity
Square D KC341751021 - 175A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
The Square D KC341751021 is a 3-pole, 175A molded case circuit breaker for commercial applications. As a legacy K-Frame model, it provides reliable thermal-magnetic protection with long-time and instantaneous (LI) trip functions. It installs into Square D I-Line panelboards and switchboards. While the base unit crosses over to the PowerPact JJA36175, this specific configuration includes a factory-installed 120-240VAC shunt trip for remote shut-offs. It features a 65kAIC rating at 480VAC.Specifications
| Brand | Square D |
|---|---|
| Part Number | KC341751021 |
| Series | KC |
| Amperage | 175A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480Y/277VAC, 65kA @ 480VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards and Switchboards |
| 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 | Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Shunt Trip (120-240 VAC), Load Side Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, HACR, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Extra High Interrupting Capacity, Non-Interchangeable Trip |
Product FAQs
5 answersWhat does the 1021 suffix indicate on the KC341751021 breaker?
The 1021 suffix designates a factory-installed 120VAC shunt trip. This allows the breaker to be opened remotely using a control voltage signal.
Which panelboards accept this K-frame circuit breaker?
This breaker features an I-Line plug-on mounting style. It is designed exclusively for Square D I-Line panelboards and switchboards and will not fit standard unit mount enclosures.
Are the trip settings adjustable on the KC341751021?
The thermal protection is fixed at 175 amps. The magnetic instantaneous trip is adjustable, allowing you to fine-tune the short-circuit response to coordinate with downstream devices.
What size conductors are supported by the factory lugs?
The standard lugs accept aluminum or copper wire ranging from 4 AWG up to 350 kcmil. Always apply the torque specifications listed on the breaker faceplate during installation.
Is this breaker suitable for high fault current applications?
Yes, the KC series provides extra high interrupting capacity. It delivers up to 100kA of fault current interruption at 240VAC and 65kA at 480VAC for heavy commercial and industrial distribution.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
- TDTammy D.Verified BuyerReviewingSquare D KC34200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/9/26Breakers
great service!! I had bought 3 different breakers & there was one that i had to return. I called as soon as i realized it was wrong.( my fault) I had my return RMA in about 5 minutes of the phone call. Highly recommend!!