Square D HJA36125SA Molded Case Circuit Breaker
- 125A
- 3 Pole
- I-Line
Quantity
Square D HJA36125SA - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Engineered for commercial applications, this 125A molded case circuit breaker delivers reliable thermal-magnetic protection. It is part of the PowerPacT H-Frame family, designed to handle demanding power distribution tasks. The unit installs into Square D I-Line panelboards and switchboards. It serves as a seamless upgrade for legacy KH36125 breakers, utilizing a convenient plug-on connection for rapid deployment. Rated 65kAIC at 480V, it includes a 120VAC shunt trip for remote tripping.Specifications
| Brand | Square D |
|---|---|
| Part Number | HJA36125SA |
| Series | HJA |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 20kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards, Switchboards |
| Wire Gauge | 14 AWG-3/0 AWG |
| Max Wire | 3/0 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator |
|---|---|
| Accessories | Shunt Trip 120VAC |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, HACR, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | Current Limiting, HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Product FAQs
5 answersHow are the line and load connections configured on the HJA36125SA?
This breaker features an I-Line plug-on connection on the line side that mounts directly to the panelboard bus, and it comes equipped with factory-installed mechanical lugs on the load side.
What does the SA suffix indicate on the HJA36125SA catalog number?
The SA suffix indicates that this breaker comes with a factory-installed 120VAC shunt trip, allowing for remote tripping of the circuit breaker.
Can the HJA36125SA be used in reverse-fed applications?
Yes, this PowerPacT H-frame breaker is suitable for reverse-fed applications.
Can the HJA36125SA be used to replace older legacy circuit breakers?
Yes, the PowerPacT H-frame HJA36125SA serves as a direct upgrade and replacement for the obsolete Square D KH36125 legacy K-frame circuit breaker.
Are the trip settings adjustable on the HJA36125SA?
The thermal protection (long-time) is fixed, but the magnetic protection (instantaneous) is adjustable, allowing you to fine-tune the short-circuit response for your specific application.
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Reviews
Review summary
Customers rate this product 4.7 out of 5 based on 15 reviews.
- RFRon F.Verified BuyerReviewingSquare D HJA36050 - 50A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/27/26Square D HJA36050 review
The delivery was on and exactly what I ordered as usual. I highly recommend Super Breakers!
- CMChris M.Verified BuyerReviewingSquare D HJA36080 - 80A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/23/26Quick delivery
Everything arrived correctly and on time.
- HEHeineken E.Verified BuyerReviewingSquare D HJA36150 - 150A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/9/26Quick Delivery
Good condition Quick Delivery
- JBJosh B.Verified BuyerReviewingSquare D HJA36060 - 60A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars1/30/26Quick Shipping
Breaker showed up quickly and as described.
- JCJoe C.Verified BuyerReviewingSquare D HJA36035 - 35A 3 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars7/29/25HJA
Shipped fast