Square D KC341751212 Molded Case Circuit Breaker
- 175A
- 3 Pole
- I-Line
Square D
KC341751212
Molded Case Circuit Breaker
Brand
Square D
SKU
KC341751212
Quantity
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Square D KC341751212 - 175A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for heavy-duty electrical systems, this 3-pole, 175A molded case circuit breaker provides robust thermal-magnetic protection. Designed specifically for Square D I-Line panelboards, the plug-on mounting style simplifies installation. While the base breaker is replaced by the PowerPact JJA36175, this legacy K-Frame model remains essential for existing infrastructure. The 1212 suffix indicates a factory-installed 1A/1B auxiliary switch. It delivers a 65kAIC rating at 480VAC.Specifications
| Brand | Square D |
|---|---|
| Part Number | KC341751212 |
| 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 |
| Frame Type | KC |
|---|---|
| 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 | Shunt Trip, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator |
|---|---|
| Accessories | Auxiliary Switch (1A/1B), 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, Current Limiting, Extra High Interrupting Capacity |
Product FAQs
6 answersWhat does the 1212 suffix mean on the Square D KC341751212?
The 1212 suffix indicates that the circuit breaker comes equipped with a factory-installed 1A/1B auxiliary switch, which is used for remote status signaling.
What is the modern replacement for the legacy KC341751212 breaker?
The legacy K-Frame KC341751212 is superseded by the modern Square D PowerPact J-Frame series. The direct base replacement is the JJA36175, though you will need to add the appropriate auxiliary switch accessory to match the original 1212 configuration.
Can I install this K-Frame breaker in a standard QO load center?
No. The KC341751212 is a K-Frame molded case circuit breaker with an I-Line plug-on connection. It is strictly compatible with commercial and industrial Square D I-Line panelboards and switchboards, not residential QO or Homeline load centers.
How does the KC341751212 mount into an electrical panel?
This breaker utilizes an I-Line style plug-on connection. This design allows it to mount directly onto the bus assembly of compatible Square D I-Line panelboards and switchboards without requiring traditional bolt-on hardware.
What wire gauge is accepted by the lugs on the KC341751212?
The standard lugs on this breaker accept either aluminum or copper (Al/Cu) conductors ranging from 4 AWG up to 350 kcmil.
Does the KC341751212 provide adjustable short-circuit protection?
Yes. While the thermal overload protection is fixed, the magnetic instantaneous trip function is adjustable. This allows licensed electricians to fine-tune the short-circuit response for the specific load requirements.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
Total 5 star reviews: 1 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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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!!