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Eaton / Cutler-Hammer HJD3125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
Eaton / Cutler-Hammer
HJD3125
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
HJD3125
Quantity
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Eaton / Cutler-Hammer HJD3125 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Eaton / Cutler-Hammer HJD3125 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | HJD3125 |
| Series | HJD |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 22kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| 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 | Line and Load Lugs (TA250KB) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, High Interrupting Capacity, Interchangeable Trip Unit |
Quantity
Eaton / Cutler-Hammer HJD3125 - 125A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | HJD3125-R |
| Series | HJD |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 22kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| 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 | Line and Load Lugs (TA250KB) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, High Interrupting Capacity, Interchangeable Trip Unit |
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Description
Engineered for robust commercial and industrial applications, the Eaton HJD3125 is a 3-pole, 125A molded case circuit breaker from the Series C line. It features fixed thermal and adjustable magnetic protection (LI). This unit-mount breaker installs into Eaton panelboards, switchboards, and motor control centers. It includes TA250KB lugs accepting 4 AWG to 350 kcmil wire. Rated for 65 kAIC at 480VAC, the HJD frame provides high interrupting capacity. It is HACR rated and reverse-feed capable.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | HJD3125 |
| Series | HJD |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 22kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| 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 | Line and Load Lugs (TA250KB) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, High Interrupting Capacity, Interchangeable Trip Unit |
Product FAQs
8 answersWhat is the difference between the HJD3125 and the standard JD3125?
The HJD3125 is the high-interrupting version of the J-Frame series. It provides a 65kA interrupting capacity at 480VAC compared to the standard JD3125, which is rated for 35kA at 480VAC. Both breakers share the same physical dimensions and mounting footprint.
How is the magnetic trip adjusted on the HJD3125?
This breaker features a fixed thermal and adjustable magnetic trip unit (LI). The magnetic pickup can be adjusted using the dial on the face of the trip unit, allowing you to coordinate short-circuit protection with downstream devices.
Are the trip units interchangeable on the HJD3125?
No, the HJD3125 is manufactured with a non-interchangeable trip unit. The thermal-magnetic trip mechanism is factory-sealed within the molded case frame.
What wire sizes are supported by the standard lugs on this breaker?
The factory-installed line and load lugs accept one 4 AWG through 350 kcmil copper or aluminum conductor per phase.
What equipment is the HJD3125 designed to be installed in?
This unit-mount J-Frame breaker is designed for installation in Eaton Series C panelboards, switchboards, and motor control centers.
Does the HJD3125 include ground fault equipment protection?
No. This breaker is equipped with a standard thermal-magnetic (LI) trip unit for overload and short-circuit protection. It does not provide integral ground fault (G) or short-time (S) protection.
Can the HJD3125 be used in DC distribution applications?
Yes, this breaker is rated for up to 250VDC with an interrupting capacity of 22kA, making it suitable for specific direct current applications.
Can this Eaton Series C breaker be reverse fed?
Standard Eaton Series C thermal-magnetic breakers like the HJD3125 can typically be reverse fed unless they are specifically marked with Line and Load designations on the terminals. Always verify the physical labeling on the breaker prior to reverse feeding.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
Total 5 star reviews: 1 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
1 review
- JWJoe W.Verified BuyerReviewingSiemens HJD63F400 Circuit Breaker FrameI recommend this productRated 5 out of 5 stars7/16/26Exactly what we needed, delivered complete and on time.
SuperBreakers had exactly what we needed (Breaker, Trip Unit, lug kits) - the breaker came quickly and with trip unit installed (ordered as a separate item) making integration quick and easy.
Solid phone support and communication re: tracking - overall a very good purchasing experience.