Square D KC34250G Molded Case Circuit Breaker
- 250A
- 3 Pole
- I-Line
Quantity
Square D KC34250G - 250A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built to handle complex industrial protection requirements, this 250-amp K-Frame breaker incorporates a specialized ground fault shunt trip. It connects into Square D I-Line panelboards, offering robust thermal-magnetic performance alongside extra-high interrupting capacity. Rated to clear faults up to 65kA at 480VAC, the unit ensures rapid response to hazardous conditions. When modernizing equipment, engineers typically replace this model with the PowerPact JJA36250 base unit.Specifications
| Brand | Square D |
|---|---|
| Part Number | KC34250G |
| Series | KC |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480Y/277VAC, 65kA @ 480VAC |
| Frame Type | KC |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | 4 AWG - 350 kcmil |
| 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, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Lugs (AL250KA), Ground Fault Shunt Trip |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Extra High Interrupting Capacity, Non-Interchangeable Trip, Trip-Free Mechanism, Quick-Make/Quick-Break |
Product FAQs
7 answersWhat does the G suffix in the KC34250G catalog number indicate?
The G suffix indicates that this breaker is equipped with a factory-installed ground fault shunt trip accessory.
What is the modern replacement for the legacy KC34250G breaker?
The KC frame is a legacy series. When upgrading, engineers typically replace this unit with a 250A PowerPact J-Frame breaker, such as the JJA36250 base unit, configured with the necessary accessories.
How is the KC34250G installed in a panelboard?
It features an I-Line plug-on design. The line side plugs directly into the bus of a Square D I-Line panelboard or switchboard, while the load side uses standard lug connections for the wiring.
Are the trip settings on the KC34250G adjustable?
This thermal-magnetic breaker features a fixed thermal (long-time) trip and an adjustable magnetic (instantaneous) trip function, allowing for short-circuit coordination.
Can I use the KC34250G in a standard NQ or NF panelboard?
No, this breaker is specifically designed with an I-Line plug-in connection and is only compatible with Square D I-Line panelboards and switchboards.
Can the KC34250G be used on a 240V system?
Yes, while it has a maximum voltage rating of 480VAC, it is fully compatible with 240VAC and 277VAC systems. When applied at 240VAC, the interrupting rating increases to 100kAIC.
What wire sizes are compatible with the KC34250G lugs?
The load lugs on this breaker accept wire sizes ranging from 4 AWG to 350 kcmil.
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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!!