Eaton / Cutler-Hammer DK2400 Molded Case Circuit Breaker

No. Eaton acquired Cutler-Hammer, and the DK2400 catalog number is the same across both brands. Depending on the manufacturing date, the breaker may feature either the Eaton or Cutler-Hammer logo, but the physical and electrical specifications are identical.

The DK2400 is a Series C K-frame molded case circuit breaker. It shares the same physical footprint and accessory compatibility as other Eaton K-frame models, such as the KD, HKD, and KDC series.

No, the DK2400 features fixed thermal and fixed magnetic trip settings. It provides standard long-time and instantaneous (LI) protection, but the trip curves cannot be adjusted in the field.

Yes, in addition to its 240VAC rating, this breaker is rated for 250VDC applications. It provides a 10kAIC interrupting capacity when used in compatible DC electrical systems.

This breaker comes standard with feed-thru lugs that accept two 3/0 AWG to 250 kcmil aluminum or copper conductors per phase. It is also compatible with standard Eaton K-frame lug kits, such as the 3TA401K, for alternate wiring configurations.

Yes. Because it is built on the Series C K-frame platform, it accepts standard K-frame internal and external accessories. This includes shunt trips, auxiliary switches, multi-wire connectors, and electrical motor operators.

The LI code stands for Long-Time and Instantaneous trip functions. The long-time thermal element protects the circuit against sustained overloads, while the instantaneous magnetic element trips the breaker immediately in the event of a short circuit.

Eaton designates the Power Defense PD3A frame as the equivalent to the Series C K-frame for 400A and below. While the terminals and footprint are similar, you must verify your specific panelboard labeling to ensure Series C breakers are listed for use in your exact enclosure.