Cutler-Hammer KS360300D is a molded case circuit breaker rated 300 A with three poles for 600 V systems, built on the KS frame (K Frame type KS). It serves as overcurrent protection for multi‑phase circuits in industrial and commercial electrical distribution panels and switchgear. The KS360300D designation denotes a 300‑amp, 3‑pole device intended for 600‑volt installations.
