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Eaton / Cutler-Hammer KDC3100 Molded Case Circuit Breaker
- 100A
- 3 Pole
- Panel Mount
Eaton / Cutler-Hammer
KDC3100
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
KDC3100
Quantity
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Eaton / Cutler-Hammer KDC3100 - 100A 3 Pole Molded Case Circuit Breaker
Re-Certified
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Description
Part of Eaton's Series C line, the KDC3100 is a 3-pole, 100A molded case circuit breaker built for industrial applications. It utilizes a thermal-magnetic trip unit with fixed thermal and adjustable magnetic settings for precise protection. This K-Frame breaker mounts into compatible Eaton Series C panelboards, switchboards, and motor control centers. It includes line and load lugs for 3 AWG to 350 kcmil wiring. Rated at 200 kAIC at 240V, it is HACR rated and supports reverse feed setups.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | KDC |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 100kA @ 480VAC, 50kA @ 600VAC, 22kA @ 250VDC |
| Frame Type | K |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 3 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 kcmil |
| Min Wire | 3 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, Padlock Attachment, Motor Operator |
|---|---|
| Accessories | Line and Load Lugs Included (TA300K) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | ABS, CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated, Reverse Feed, Interchangeable Trip Unit, Trip-Free Mechanism, Visual Trip Indicator |
Product FAQs
8 answersCan the KDC3100 be installed in standard residential load centers?
No, this K-Frame breaker is designed specifically for commercial and industrial applications. It is intended for use in Eaton Series C panelboards, switchboards, and motor control centers, and will not fit in standard residential breaker boxes.
How does the adjustable magnetic trip function work on this 100A breaker?
While the thermal overload protection is fixed at 100 amps, the magnetic trip is adjustable. This allows panel builders to set the instantaneous short-circuit response threshold, helping to coordinate with downstream devices and prevent nuisance tripping from high motor inrush currents.
What type of mounting does the KDC3100 require?
This is a feed-thru, panel-mounted molded case circuit breaker. It bolts directly into compatible enclosures and does not snap onto a DIN rail or plug into a busbar like miniature circuit breakers.
Can the Eaton KDC3100 replace older Cutler-Hammer K-Frame breakers?
Yes, Eaton acquired Cutler-Hammer and maintained the Series C product line. The KDC3100 can directly replace older Cutler-Hammer or Westinghouse K-Frame breakers that share the same physical footprint and electrical specifications.
Is the KDC3100 suitable for direct current (DC) systems?
Yes, in addition to its AC ratings, this breaker is rated for up to 250VDC with a 22kAIC interrupting capacity. This makes it viable for specific industrial DC control circuits, battery backups, or solar applications requiring a 100A disconnect.
What are the wire size requirements for the standard lugs?
The factory lugs accept 3 AWG through 350 kcmil conductors and are rated for both aluminum and copper wire. Always apply the manufacturer-specified torque during installation to ensure a secure connection and prevent terminal overheating.
What precautions should be taken before adjusting the magnetic trip settings?
Adjustments to the magnetic trip dials should only be performed by a qualified electrician after the breaker has been completely de-energized. Settings must align with a facility coordination study to ensure proper fault clearing and personnel safety.
Are accessories like shunt trips or auxiliary switches compatible with this breaker?
Yes, Eaton Series C K-Frame breakers support a variety of internal accessories. However, these accessories must be field-installed by a qualified technician or ordered pre-installed from the factory, as they require opening the breaker housing.
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