Square D KC24250BC Molded Case Circuit Breaker
- 250A
- 2 Pole
- I-Line
Quantity
Square D KC24250BC - 250A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Quantity
Square D KC24250BC - 250A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | KC24250BC |
| Series | KC |
| Amperage | 250A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 100kA @ 240VAC, 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 | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | 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, Phase B-C Connection |
Quantity
Square D KC24250BC - 250A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | KC24250BC-R |
| Series | KC |
| Amperage | 250A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 100kA @ 240VAC, 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 | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | 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, Phase B-C Connection |
Description
Designed for heavy-duty applications, this 250A extra-high interrupting breaker safeguards electrical systems against severe overcurrents. The device mounts into Square D I-Line switchboards and panelboards using a dedicated phase B-C connection. Delivering 65kAIC at 480VAC, it includes long-time and instantaneous trip functions. Facilities looking to modernize can substitute this legacy K-Frame with the newer JJA26250.Specifications
| Brand | Square D |
|---|---|
| Part Number | KC24250BC-R |
| Series | KC |
| Amperage | 250A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 100kA @ 240VAC, 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 | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | 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, Phase B-C Connection |
Product FAQs
7 answersWhat does the "BC" suffix indicate on the KC24250BC catalog number?
The "BC" suffix specifies the phase connection for this 2-pole breaker. It is factory-configured to plug directly into the B and C phases of a Square D I-Line panelboard bus.
What is the modern replacement series for the legacy K-Frame KC24250BC?
Square D has transitioned legacy K-Frame breakers to the PowerPact J-Frame series. A PowerPact J-Frame I-Line breaker with matching 250A, 2-pole, and 65kAIC at 480V specifications serves as the direct modern upgrade.
How is the KC24250BC installed into an electrical system?
This breaker utilizes an I-Line plug-on mounting design. The line side connects directly to the busbar of a compatible Square D I-Line panelboard or switchboard, while the load side uses mechanical lugs for wire termination.
Are the trip settings adjustable on this 250A circuit breaker?
Yes, the thermal-magnetic trip unit features an adjustable instantaneous magnetic trip setting. The thermal overload protection (Long-Time) remains fixed at 250A.
Can the KC24250BC be installed in standard NQ or NF panelboards?
No. This K-Frame breaker is designed exclusively for Square D I-Line panelboards and switchboards. It is not compatible with NQ, NF, or QO series load centers.
Does this breaker support direct current (DC) applications?
Yes, the KC24250BC is rated for DC power systems up to 250 VDC, providing an interrupting capacity of 10 kA for direct current applications.
What wire sizes and materials are compatible with the load lugs?
The factory-installed load lugs accept either aluminum or copper conductors ranging from 4 AWG up 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!!