Square D KH26125AB Molded Case Circuit Breaker
- 125A
- 2 Pole
- I-Line
Quantity
Square D KH26125AB - 125A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Manufactured by Schneider Electric, the KH26125AB is a 2-pole, 125-amp molded case circuit breaker designed for commercial distribution. It features a specific Phase A-B connection configuration. This legacy K-frame unit installs into Square D I-Line panelboards and switchboards. For modern facility upgrades, it is replaced by the PowerPact HGA261251. Rated for 65kA interrupting capacity at 240VAC, it provides fixed thermal and adjustable magnetic trip functions with included load lugs.Specifications
| Brand | Square D |
|---|---|
| Part Number | KH26125AB-R |
| Series | KH |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | K Frame |
|---|---|
| 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, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included (AL250KA) |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity |
Product FAQs
6 answersWhat does the AB suffix mean in the KH26125AB catalog number?
The AB suffix indicates the breaker is configured specifically for an A and B phase connection on the bus of Square D I-Line panelboards and switchboards.
How does the KH26125AB mount into a panel?
It utilizes an I-Line style plug-in connection, which allows the breaker to plug directly into the bus assembly of compatible Square D I-Line commercial panelboards and switchboards.
What wire sizes are compatible with the lugs on this breaker?
The included lugs accommodate wire sizes ranging from 4 AWG to 350 kcmil and are rated for both aluminum and copper (Al/Cu) conductors.
How does the trip unit operate on the KH26125AB?
It uses a thermal-magnetic trip mechanism providing Long-Time and Instantaneous (LI) protection. The thermal element is fixed, while the magnetic instantaneous trip is adjustable to fine-tune short-circuit protection.
Is the KH26125AB a current production model?
The KH26125AB is part of the legacy Square D K-Frame series. For modern replacements or new installations, Schneider Electric has transitioned to the PowerPact H-Frame series.
Can I install this K-Frame breaker in a standard QO or Homeline load center?
No, the KH26125AB is a K-Frame molded case circuit breaker with an I-Line plug-in mounting style. It is strictly for commercial and industrial I-Line panelboards and switchboards, not residential load centers.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
- DPDouglas P.ReviewingSquare D KH36225 - 225A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars5/26/23I got it the next
I got it the next day and it worked just like it should. Thank you