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Square D KA36110-1021 Molded Case Circuit Breaker
- 110A
- 3 Pole
- I-Line
Square D
KA36110-1021
Molded Case Circuit Breaker
Brand
Square D
SKU
KA36110-1021
Quantity
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Square D KA36110-1021 - 110A 3 Pole Molded Case Circuit Breaker
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Description
Part of the legacy K-Frame series, the Square D KA36110-1021 is a 3-pole, 110A MCCB designed for commercial applications. It features thermal-magnetic trip technology with fixed thermal and adjustable magnetic settings. This breaker installs into Square D I-Line panelboards. For modern upgrades, it is replaced by the H-Frame HGA36110SA. The "-1021" suffix indicates a factory-installed 120-240VAC shunt trip for remote tripping. It delivers 25kAIC at 480VAC and is HACR rated.Specifications
| Brand | Square D |
|---|---|
| Part Number | KA36110-1021 |
| Series | KA |
| Amperage | 110A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 25kA @ 480VAC, 22kA @ 600VAC, 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 | Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Shunt Trip (120-240VAC) |
| 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, Non-Interchangeable Trip |
Product FAQs
5 answersWhat panelboards accept the KA36110-1021 circuit breaker?
This legacy K-Frame breaker features a plug-in connection designed specifically for installation in Square D I-Line panelboards and switchboards.
What does the 1021 suffix indicate on this catalog number?
The 1021 suffix designates that this breaker includes a factory-installed 120-240VAC shunt trip accessory. This allows the breaker to be tripped remotely by an external voltage signal.
Is the KA36110-1021 still actively manufactured, or is there a modern replacement?
The KA36110-1021 is part of the legacy Square D K-Frame series. For modern panel upgrades or replacements, engineers typically cross-reference this unit to the current H-Frame equivalent, such as the HGA36110 or HGA36110SA.
How can I visually verify if the KA36110-1021 has tripped?
This breaker is equipped with a Visi-Trip indicator. When the breaker trips due to an overcurrent or short circuit, the handle moves to a center position and a high-visibility red indicator appears, allowing for rapid troubleshooting.
Are the trip settings adjustable on this 110A breaker?
The KA36110-1021 utilizes a thermal-magnetic trip unit with a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short-circuit protection.
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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.