KD35K is a member of the Cutler-Hammer Series C K-Frame Molded Case Circuit Breaker (MCCB) family. The "35K" designation identifies a breaker with an interrupting capacity of 35 kA at 480 VAC. KD35K breakers are commonly available in 3-pole configurations ranging from 225A to 400A, utilizing thermal-magnetic or interchangeable trip units for industrial and commercial power distribution applications.