Square D KH36125-1380 Molded Case Circuit Breaker
- 125A
- 3 Pole
- I-Line
Quantity
Square D KH36125-1380 - 125A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for industrial applications, the Square D KH36125-1380 delivers reliable thermal-magnetic protection. This 3-pole, 125A MCCB mounts into Square D I-Line panelboards using a plug-on connection. The 1380 suffix indicates a factory-installed 120VAC shunt trip and 1A/1B auxiliary switch for remote tripping and status signaling. Rated 35kAIC at 480VAC, it features LI trip functions. This legacy K-Frame device crosses to the modern PowerPact JJA36125 series for new installations.Specifications
| Brand | Square D |
|---|---|
| Part Number | KH36125-1380-R |
| Series | KH |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 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 | Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Auxiliary Switch (1A/1B), Shunt Trip (120VAC) |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity |
Product FAQs
8 answersWhat accessories are included with the KH36125-1380 configuration?
The 1380 catalog suffix indicates that this breaker comes with a factory-installed 120VAC shunt trip for remote opening, as well as a 1A/1B auxiliary switch for remote status signaling.
What is the modern replacement for the legacy KH36125-1380?
The K-Frame series is a legacy product. For new installations, it typically crosses over to the modern Square D PowerPact J-Frame series, such as the JJA36125. You must also specify the equivalent shunt trip and auxiliary switch accessories when upgrading.
Can the KH36125-1380 be used in standard NEMA enclosures or load centers?
No, this breaker features an I-Line plug-on connection and is exclusively compatible with Square D I-Line panelboards and switchboards. It cannot be used in standard QO load centers or unit-mount enclosures.
How is the KH36125-1380 secured inside the panelboard?
It utilizes the Square D I-Line plug-on mounting system. The line side plugs directly onto the panelboard bus stack, while the load side uses standard mechanical lugs for wire termination.
What type of conductors can be terminated on the KH36125-1380?
The standard lugs on this breaker are rated for both aluminum and copper (Al/Cu) conductors, accommodating wire sizes from 4 AWG up to 350 kcmil.
Are the trip settings adjustable on the KH36125-1380?
This thermal-magnetic breaker features a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short-circuit protection.
Is the KH36125-1380 suitable for direct current systems?
Yes, this breaker is rated for use on 250VDC systems, providing up to 10kA of interrupting capacity for DC applications.
How does the factory-installed shunt trip improve system safety?
The included 120VAC shunt trip allows the breaker to be opened remotely. This is commonly used for emergency stop circuits, fire alarm integration, or automated safety shutdowns.
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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