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Eaton / Cutler-Hammer KD3300 Molded Case Circuit Breaker
- 300A
- 3 Pole
- Panel Mount
Eaton / Cutler-Hammer
KD3300
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
KD3300
Quantity
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Eaton / Cutler-Hammer KD3300 - 300A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Eaton / Cutler-Hammer KD3300 - 300A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | KD3300 |
| Series | KD |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Series C Panelboards, Pow-R-Line 3a Panelboards, Pow-R-Line 4 Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 250-500 kcmil (Al/Cu) |
| 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, Motor Operator, Handle Mechanism, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs (TA350K) |
| Standards | HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Interchangeable Trip Unit |
Quantity
Eaton / Cutler-Hammer KD3300 - 300A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | KD3300-R |
| Series | KD |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Series C Panelboards, Pow-R-Line 3a Panelboards, Pow-R-Line 4 Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 250-500 kcmil (Al/Cu) |
| 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, Motor Operator, Handle Mechanism, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs (TA350K) |
| Standards | HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Interchangeable Trip Unit |
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Description
Built for commercial power distribution, the Eaton KD3300 is a 300A, three-pole molded case circuit breaker. It operates within the proven Series C K-Frame architecture to safeguard electrical infrastructure. This unit mounts into Pow-R-Line 3a and 4 panelboards, motor control centers, and switchboards. It includes TA350K lugs that accommodate 250-500 kcmil conductors. With a 35 kAIC rating at 480VAC, it utilizes an interchangeable trip unit with fixed thermal and adjustable magnetic settings.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | KD3300 |
| Series | KD |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Series C Panelboards, Pow-R-Line 3a Panelboards, Pow-R-Line 4 Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 250-500 kcmil (Al/Cu) |
| 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, Motor Operator, Handle Mechanism, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs (TA350K) |
| Standards | HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Interchangeable Trip Unit |
Product FAQs
6 answersWhat specific panelboards will accept the KD3300?
This unit mounts directly into Eaton Series C, Pow-R-Line 3a, and Pow-R-Line 4 panelboards. It is also suitable for integration into compatible industrial switchboards and motor control centers.
Which trip functions are adjustable on this 300A breaker?
The KD3300 utilizes an interchangeable thermal-magnetic trip unit with a fixed long-time thermal element and an adjustable instantaneous magnetic trip. This adjustability allows electricians to dial in the short-circuit protection to properly coordinate with downstream loads.
Which standard lugs are included, and what are their conductor limits?
The breaker is equipped with TA350K line and load side lugs. These terminals securely accept either copper or aluminum wire ranging from 250 kcmil to 500 kcmil.
What is the replacement trip unit catalog number?
Because this breaker features an interchangeable design, the thermal-magnetic trip block can be replaced without swapping the entire K-Frame. The correct trip unit part number is KT3300T.
Is the KD3300 safe for reverse feed configurations?
Yes. Standard Series C thermal-magnetic circuit breakers that lack dedicated line and load restrictions on the frame, such as the KD3300, are physically capable of being reverse fed. Always consult the National Electrical Code (NEC) for application-specific compliance.
How is this breaker rated for direct current (DC) systems?
In addition to standard AC voltages, this breaker provides a 10kA interrupting capacity at 250 VDC. Installers must ensure standard DC wiring practices, such as wiring poles in series if required by the system design, are followed to ensure proper arc interruption.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 2 reviews.
Total 5 star reviews: 2 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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2 reviews
- CMCorbett M.Rated 5 out of 5 stars5/25/21Great pricing
Site is easy to use, and best pricing out there.
- JPJob# P.Rated 5 out of 5 stars2/13/18Denis M. Fortino VP Premium Electric Corp.
Superbreakers provides outstanding service. My thanks to Javier for tech support!