Eaton / Cutler-Hammer DK3400W Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Eaton / Cutler-Hammer
DK3400W
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
DK3400W
Quantity
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Eaton / Cutler-Hammer DK3400W - 400A 3 Pole Molded Case Circuit Breaker
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Eaton / Cutler-Hammer DK3400W - 400A 3 Pole Molded Case Circuit Breaker
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| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | DK |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 10kA @ 250VDC |
| Frame Type | DK |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series C Panelboards, Motor Control Centers, Switchboards |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Rotary Handle |
|---|---|
| Accessories | Without Line and Load Terminals |
| Standards | HACR, NEMA AB 1, UL 489, CSA C22.2 No. 5 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Quantity
Eaton / Cutler-Hammer DK3400W - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | DK |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 10kA @ 250VDC |
| Frame Type | DK |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series C Panelboards, Motor Control Centers, Switchboards |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Rotary Handle |
|---|---|
| Accessories | Without Line and Load Terminals |
| Standards | HACR, NEMA AB 1, UL 489, CSA C22.2 No. 5 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
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Description
Engineered for heavy-duty applications, this 400A, three-pole MCCB belongs to the Eaton Series C family. It delivers dependable power distribution for commercial facilities. The K-Frame breaker integrates into Eaton Series C panelboards, motor control centers, and switchboards. It comes without line or load lugs, giving installers flexibility. Delivering a 65 kAIC rating at 240VAC, it utilizes fixed thermal-magnetic trip units. It is HACR rated and supports reverse feed setups.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | DK |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 10kA @ 250VDC |
| Frame Type | DK |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series C Panelboards, Motor Control Centers, Switchboards |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Rotary Handle |
|---|---|
| Accessories | Without Line and Load Terminals |
| Standards | HACR, NEMA AB 1, UL 489, CSA C22.2 No. 5 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Product FAQs
8 answersWhat equipment is compatible with the DK3400W circuit breaker?
The DK3400W is a K-Frame breaker designed for installation in Eaton Series C panelboards, switchboards, and motor control centers.
Will the DK3400W fit in the same space as a KD or HKD breaker?
Yes, the DK3400W is part of the Eaton Series C K-Frame family. It shares the exact same physical dimensions and mounting footprint as other K-Frame breakers, including the KD, HKD, and KDC models.
What does the W suffix mean in the DK3400W catalog number?
According to Eaton nomenclature, the W suffix indicates the circuit breaker leaves the factory without line and load terminals. The base DK3400 catalog number includes standard factory lugs.
Are Cutler-Hammer and Westinghouse DK3400W breakers interchangeable with the Eaton DK3400W?
Yes. Eaton acquired the Cutler-Hammer and Westinghouse molded case circuit breaker lines. An Eaton DK3400W is a direct, drop-in replacement for legacy Cutler-Hammer and Westinghouse breakers sharing the exact same catalog number.
Can this breaker be used in 480V or 600V electrical systems?
No, the DK frame is strictly rated for a maximum of 240VAC (with a 65kAIC interrupting rating) or 250VDC. For 480V or 600V applications, a different K-Frame breaker like the KD or KDC series is required.
Is the DK3400W rated for direct current (DC) systems?
Yes, in addition to its AC ratings, the DK3400W is rated for up to 250VDC with a 10kAIC interrupting capacity, making it suitable for specific DC power distribution applications.
Is the DK3400W suitable for reverse feed applications?
Yes, Eaton Series C K-Frame circuit breakers equipped with non-interchangeable thermal-magnetic trip units, such as the DK3400W, are suitable for reverse feed use.
Does the DK3400W feature an adjustable trip unit?
No, this breaker utilizes a fixed thermal and fixed magnetic trip unit. It provides standard long-time and instantaneous (LI) protection but does not allow for field adjustments of the trip curve.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 3 reviews.
Total 5 star reviews: 3 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
3 reviews
- MDMichael D.Verified BuyerReviewingEaton / Cutler-Hammer DK3400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/13/26Perfect fit and fast shipping
My animal hospital had the main breaker fail. They were able to get the breaker to me in record time. Went right in and fixed the problem.
- TPThomas P.ReviewingEaton / Cutler-Hammer DK3400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars1/26/23Quick and on time
The service was quick and on time, no problems with the breaker.
- LFLou F.ReviewingEaton / Cutler-Hammer DK3300 - 300A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars12/24/20Owner
Purchasing from Superbreakers has been a great experience! It was quick and easy. The inventory was awesome. We needed some advice and your crack team of experts was very helpful! Thanks!