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Square D KA26100BC Molded Case Circuit Breaker
- 100A
- 2 Pole
- I-Line
Square D
KA26100BC
Molded Case Circuit Breaker
Brand
Square D
SKU
KA26100BC
Quantity
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Square D KA26100BC - 100A 2 Pole Molded Case Circuit Breaker
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100A 2 Pole Molded Case Circuit Breaker
100A 2 Pole Molded Case Circuit Breaker
Description
Built for demanding commercial environments, this 2-pole, 100A MCCB delivers dependable long-time and instantaneous (LI) trip functions. It is part of Square D's legacy K-Frame series. The breaker features a B-C phase connection and installs into Square D I-Line panelboards. When transitioning to newer equipment, the PowerPact HGA261004 serves as the recommended substitute. With a 25 kAIC rating at 480VAC, it handles fault currents using an adjustable magnetic trip. It is also HACR rated.Specifications
| Brand | Square D |
|---|---|
| Part Number | KA26100BC-R |
| Series | KA |
| Amperage | 100A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 42kA @ 240VAC, 25kA @ 480Y/277VAC, 25kA @ 480VAC, 22kA @ 600Y/347VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | K |
|---|---|
| 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 | Phase Connection: B-C (Factory Configured) |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
8 answersWhat does the BC suffix mean on the KA26100BC?
The BC suffix indicates the breaker is configured to connect to the B and C phases of a 3-phase I-Line panelboard or switchboard bus.
Which panelboards are compatible with the KA26100BC?
This breaker is designed exclusively for use in Square D I-Line panelboards and switchboards. It will not fit standard NQ, NF, or QO load centers.
What is the magnetic trip range for this 100A breaker?
The KA26100BC features an adjustable magnetic trip unit with a range of 500A on the low setting to 1000A on the high setting. The thermal trip is fixed at 100A.
What type of trip unit does the KA26100BC use?
It uses a thermal magnetic trip unit with Long-Time and Instantaneous (LI) trip functions. The thermal element provides fixed overload protection, while the magnetic element provides adjustable short-circuit protection.
Can this breaker be used in DC electrical systems?
Yes, the KA26100BC is rated for use in DC applications up to 250VDC, providing an interrupting capacity of 10kA.
How is the KA26100BC installed in a panel?
It utilizes an I-Line style plug-in connection for the line side, which mounts directly onto the panelboard bus. The load side uses mechanical lugs to secure the wiring.
What wire sizes are accepted by the load lugs?
The standard load lugs accept aluminum or copper wire ranging from 4 AWG to 350 kcmil.
Is the Square D KA frame still in active production?
The KA frame is a legacy series that has been replaced by the newer PowerPact H-frame circuit breakers. Because I-Line panels maintain backwards compatibility, this breaker serves as a direct replacement for older KA installations.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 14 reviews.
Total 5 star reviews: 13 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
14 reviews
- RFRon F.Verified BuyerReviewingSquare D KA36150 - 150A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/27/26Square D KA36150
As usual, on time and in great condition!
- SJShawn J.Verified BuyerReviewingSquare D KA36225 - 225A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/27/26I Line BreKER
Found exactly what I was looking for. They called and set over specs so I could confirm the fit!
- RFRon F.Verified BuyerReviewingSquare D KA36100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/9/26Multiple orders
I have purchased multiple breakers (of fairly large size) from SuperBreakers and their pricing has been excellent and the delivery time spot on. I would highly recommend them
- MFMatt F.Verified BuyerReviewingSquare D KA36100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/21/25Order Messed Up - Breaker Great
I have ordered many breakers through SuperBreakers with no issues until this order. I ordered this breaker and it wasn't shipped. I sent a message and was told that a mistake was make in shipping and that they would next day air the breaker to me. 5 days later (weekend in there) the breaker arrived. Not next day air, but shit happens. Sent the breaker still in the box out with my electrician and received a call from him that the breaker that was sent was a KAL36100 not the KA36100. I reached out to SuperBreakers and was told the correct breaker would be next day aired that day and I was emailed a shipping label to send back the incorrect one. This time it arrived the next day and was installed. This error cost my customer a couple days with out power to a dimmer cabinet and about 2 extra hours of labor, but all was okay in the end. Mistakes happen. The help and quick responses to my emails I received from Mike David showed me enough about this company. I look forward to my next order. Thank you for working this situation out in timely manor.
- JHJoel H.Verified BuyerReviewingSquare D KA36200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/5/25Worked As Planned
They had what we needed to match existing equipment, they shipped the same day and we put it right into service, no problems from first phone call to delivery and install.