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Square D KCL34250 Molded Case Circuit Breaker
- 250A
- 3 Pole
- Unit Mount
Square D
KCL34250
Molded Case Circuit Breaker
Brand
Square D
SKU
KCL34250
Quantity
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Square D KCL34250 - 250A 3 Pole Molded Case Circuit Breaker
Re-Certified
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Square D KCL34250 - 250A 3 Pole Molded Case Circuit Breaker
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| Brand | Square D |
|---|---|
| Part Number | KCL34250 |
| Series | KCL |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480Y/277VAC, 480VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480Y/277VAC, 65kA @ 480VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D Enclosures, 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, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Lugs (AL250KA) |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Extra High Interrupting Capacity, HACR Rated, Non-Interchangeable Trip |
Quantity
Square D KCL34250 - 250A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | KCL34250-R |
| Series | KCL |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480Y/277VAC, 480VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480Y/277VAC, 65kA @ 480VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D Enclosures, 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, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Lugs (AL250KA) |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Extra High Interrupting Capacity, HACR Rated, Non-Interchangeable Trip |
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Description
Operating as a core component in industrial systems, the Square D KCL34250 is a 3-pole, 250A molded case circuit breaker. It provides fixed thermal and adjustable magnetic trip functions (LI) to safeguard equipment from overloads and short circuits. This unit-mount breaker is designed for use within Square D enclosures and switchboards. As a legacy K-Frame device, it maintains existing infrastructure but can be replaced by the PowerPacT JJL36250.Specifications
| Brand | Square D |
|---|---|
| Part Number | KCL34250-R |
| Series | KCL |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480Y/277VAC, 480VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480Y/277VAC, 65kA @ 480VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D Enclosures, 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, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Lugs (AL250KA) |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Extra High Interrupting Capacity, HACR Rated, Non-Interchangeable Trip |
Product FAQs
6 answersWhat is the modern replacement for the legacy Square D KCL34250?
The KCL34250 is a legacy K-Frame circuit breaker. For modern applications, it has been succeeded by the Square D PowerPacT J-Frame series.
What type of wire connections does the KCL34250 support?
This breaker comes standard with line and load side lugs that accept either aluminum or copper conductors. The supported wire range is 4 AWG to 350 kcmil.
What does the LI trip function indicate on the KCL34250?
The LI designation means this thermal-magnetic breaker provides Long-Time (L) and Instantaneous (I) overcurrent protection. It features a fixed thermal setting for overloads and an adjustable magnetic setting for short circuits.
Is the KCL34250 compatible with Square D I-Line panelboards?
No. The KCL34250 is a unit-mount breaker designed for standard enclosures and switchboards. It features lugs on both ends and does not have the plug-on jaw connections required for I-Line panelboards.
How do you decode the KCL34250 part number?
In the Square D naming convention, "K" denotes the frame size. "C" indicates the extra-high interrupting capacity tier. "L" specifies a unit-mount configuration with lugs on both ends. "3" stands for 3-pole. "4" designates a 480VAC maximum voltage rating, and "250" represents the 250-amp rating.
Are the trip settings on the KCL34250 adjustable?
The thermal overload protection is fixed at 250 amps. However, the magnetic short-circuit protection is adjustable, allowing you to fine-tune the instantaneous trip response for specific equipment inrushes.
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Reviews
Review summary
Customers rate this product 4.8 out of 5 based on 5 reviews.
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5 reviews
- BWBrian W.Verified BuyerReviewingSquare D KCL34125 - 125A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/27/26Great!
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- BWBrian W.Verified BuyerReviewingSquare D KCL34250 - 250A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/24/26Great Service!
Great condition, quick shipping
- JFJ F.Verified BuyerReviewingSquare D KCL34150 - 150A 3 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars5/8/26Breakers are right
I thought I was getting a tshirt too. But, alas, no