Eaton / Cutler-Hammer HKD3400T106W Molded Case Circuit Breaker
- 400A
- 3 Pole
- Panel Mount
Quantity
Eaton / Cutler-Hammer HKD3400T106W - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for high-capacity industrial environments, this 400A K-Frame breaker features the sophisticated Digitrip Optim 1050 LSIG trip unit for comprehensive diagnostics and harmonic analysis. It easily installs into Eaton Series C switchboards and panelboards using a standard panel mount design. Capable of interrupting 65 kAIC at 480VAC, the HKD3400T106W delivers highly customizable long-time, short-time, instantaneous, and ground fault protection alongside advanced power monitoring.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | HKD3400T106W |
| Series | HKD |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 22kA @ 250VDC |
| Amperage Range | 160-400A |
|---|
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 3/0 AWG to 250 kcmil |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSIG |
| Trip Function | Long-Time, Short-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Adjustable |
| Trip Unit Model | Digitrip Optim 1050 |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Lug Kits |
|---|---|
| Accessories | Digitrip Optim 1050 Trip Unit |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Interchangeable Trip Unit |
Product FAQs
8 answersWhat equipment is the HKD3400T106W designed to fit?
This K-Frame breaker is engineered for installation in Eaton Series C panelboards, switchboards, and motor control centers.
What protection functions are included in the T106W trip unit?
The T106W designation indicates an electronic trip unit with LSIG functions. This provides adjustable Long-Time, Short-Time, Instantaneous, and Ground-Fault protection for precise system coordination.
What wire size is compatible with the terminals on this 400A breaker?
The factory-installed lugs on the HKD3400T106W accept wire gauges ranging from 3/0 AWG up to 250 kcmil.
How is the HKD3400T106W mounted in an electrical enclosure?
This breaker features a bolt-on connection for secure panel mounting within compatible Eaton enclosures.
Is the HKD3400T106W suitable for direct current (DC) systems?
Yes, it is rated for use in 250VDC systems and provides a 22kAIC interrupting rating for DC applications.
Does the electronic trip unit on this breaker require a separate rating plug?
Models equipped with the newer Digitrip 310+ electronic trip unit do not require a separate rating plug. The trip settings are fully adjustable directly on the face of the breaker.
Can this breaker replace older Cutler-Hammer HKD models?
Yes, Eaton and Cutler-Hammer are the same brand. The HKD3400T106W can directly replace older Cutler-Hammer Series C K-Frame breakers with matching specifications.
What is the maximum interrupting capacity of the HKD3400T106W on AC systems?
This breaker offers a high interrupting rating of 100kAIC at 240VAC and 65kAIC at 480VAC, making it suitable for systems with substantial available fault current.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 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.