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Eaton / Cutler-Hammer HKD3300 Molded Case Circuit Breaker
- 300A
- 3 Pole
- Panel Mount
Eaton / Cutler-Hammer
HKD3300
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
HKD3300
Quantity
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Eaton / Cutler-Hammer HKD3300 - 300A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Eaton / Cutler-Hammer HKD3300 - 300A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | HKD3300 |
| Series | HKD |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 22kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 250 kcmil - 500 kcmil |
| Max Wire | 500 kcmil |
| Min Wire | 250 kcmil |
| 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, Motor Operator |
|---|---|
| Accessories | Line and Load Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CE, CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, HACR Rated, Reverse Feed, Interchangeable Trip Unit, Trip-Free Mechanism, Quick-Make/Quick-Break |
Quantity
Eaton / Cutler-Hammer HKD3300 - 300A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | HKD3300-R |
| Series | HKD |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 22kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 250 kcmil - 500 kcmil |
| Max Wire | 500 kcmil |
| Min Wire | 250 kcmil |
| 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, Motor Operator |
|---|---|
| Accessories | Line and Load Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CE, CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, HACR Rated, Reverse Feed, Interchangeable Trip Unit, Trip-Free Mechanism, Quick-Make/Quick-Break |
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Description
Part of Eaton's Series C family, the HKD3300 is a 3-pole, 300A molded case circuit breaker built for industrial power distribution. This K-Frame unit provides reliable thermal-magnetic protection. It mounts into Eaton panelboards, switchboards, and motor control centers. The breaker includes standard line and load lugs and replaces older KD3300 models. Rated for 65 kAIC at 480VAC, this high-interrupting capacity breaker features an interchangeable trip unit and is HACR rated.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | HKD3300 |
| Series | HKD |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 22kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 250 kcmil - 500 kcmil |
| Max Wire | 500 kcmil |
| Min Wire | 250 kcmil |
| 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, Motor Operator |
|---|---|
| Accessories | Line and Load Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CE, CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, HACR Rated, Reverse Feed, Interchangeable Trip Unit, Trip-Free Mechanism, Quick-Make/Quick-Break |
Product FAQs
5 answersWhat is the difference between the KD3300 and the HKD3300?
The HKD3300 is the high-interrupting capacity version of the standard KD3300 K-Frame breaker. Both share the same physical dimensions and 300A rating, but the HKD model safely clears much higher fault currents, making it required for industrial panels with elevated available fault current.
Are line and load lugs included with the HKD3300 circuit breaker?
Yes, this complete Series C breaker comes with factory-installed line and load side lug terminals. The provided lugs accept wire sizes ranging from 250 kcmil to 500 kcmil.
How is the thermal-magnetic trip unit configured on the HKD3300?
This breaker features a non-interchangeable LI trip unit. It provides fixed thermal protection for continuous overloads and an adjustable magnetic trip dial, allowing electricians to fine-tune the instantaneous short-circuit response based on the load profile.
What enclosures and equipment accept the HKD3300 breaker?
This K-Frame unit is built for panel-mount installations. It integrates directly into Eaton and Cutler-Hammer Series C panelboards, switchboards, and motor control centers.
Is the HKD3300 rated for reverse feed applications?
Yes. Eaton Series C K-Frame breakers equipped with non-interchangeable trip units, like the HKD3300, are suitable for reverse feed use. Note that K-Frame models with interchangeable trip units are not approved for backfeeding.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 4 reviews.
Total 5 star reviews: 4 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
4 reviews
- ASAaron S.Verified BuyerReviewingEaton / Cutler-Hammer HKD3400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/13/26Worked as advertised
Don't forget the lug kit if needed
- LHLarry H.Verified BuyerReviewingEaton / Cutler-Hammer HKD3200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/19/25It was great
New breaker
- CSCatherine S.ReviewingEaton / Cutler-Hammer HKD3400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/24/22Great
Great Service / Prompt Delivery
- FSFrank S.ReviewingEaton / Cutler-Hammer HKD3400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/23/17Breaker purchase
Purchased breaker at a great price, was in stock and shipped it out right away. Will shop at this site again in the future.