Square D KAP36125MT Molded Case Circuit Breaker
- 125A
- 3 Pole
- Bolt-On
Square D
KAP36125MT
Molded Case Circuit Breaker
Brand
Square D
SKU
KAP36125MT
Quantity
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Square D KAP36125MT - 125A 3 Pole Molded Case Circuit Breaker
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Description
Built to handle demanding loads, the Square D KAP36125MT is a 3-pole, 125A molded case circuit breaker. This specific model includes the required mounting hardware, streamlining the installation process for contractors. The unit mounts into legacy Square D panelboards and switchboards requiring K-Frame breakers. It provides a seamless replacement solution for aging infrastructure, avoiding immediate PowerPacT J-Frame retrofits.Specifications
| Brand | Square D |
|---|---|
| Series | KAP |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 25kA @ 480VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | K |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Panelboards, 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, Undervoltage Release, Alarm Switch, Padlock Attachment, Lug Kits |
|---|---|
| Accessories | Mounting Hardware, Lugs Not Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Visual Trip Indicator |
Product FAQs
5 answersWhich panelboards are compatible with the KAP36125MT circuit breaker?
This bolt-on K-Frame breaker is designed for use in legacy Square D panelboards and switchboards configured for K-Frame molded case circuit breakers.
Is the Square D KAP36125MT still in active production?
No, the K-Frame series is a legacy, discontinued product line. For modern infrastructure upgrades, Schneider Electric recommends transitioning to the PowerPacT J-Frame series.
What does the MT suffix indicate on the KAP36125MT catalog number?
The MT suffix indicates that this specific model includes the required mounting hardware, streamlining the installation process into compatible Square D panelboards.
How does the adjustable magnetic trip function work on this breaker?
The KAP36125MT features a thermal-magnetic trip unit with a fixed thermal response for overload protection and an adjustable magnetic response. The adjustable magnetic dial allows electricians to fine-tune the instantaneous short-circuit trip threshold to coordinate with downstream loads and prevent nuisance tripping.
Can I use a PowerPacT J-Frame breaker as a direct drop-in replacement for the KAP36125MT?
While the PowerPacT J-Frame is the manufacturer recommended modern replacement for legacy K-Frame breakers, it is not an exact dimensional drop-in. Upgrading to a J-Frame in an older panelboard typically requires a specific retrofit mounting kit.
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