Eaton HKDDC3300A1301S4201Z01 Circuit Breaker

The Eaton Cutler-Hammer HKDDC3300A1301S4201Z01 is a 300 A circuit breaker in the HKD-DC family designed to protect DC power circuits and the equipment they serve. This unit is specified for use with 12–24 VAC or VDC systems, enabling protection of low‑voltage power distributions that run on either AC or DC supplies. When current exceeds its 300 A rating, the breaker opens the circuit to prevent damage from overloads or short circuits, helping safeguard wiring, components, and connected devices. Identified by the exact part number HKDDC3300A1301S4201Z01, it carries Eaton’s Cutler-Hammer branding, a hallmark of industrial protective devices. The design supports installation in panel boards and DC distribution assemblies where reliable, rapid isolation of faulted branches is required, making it suitable for compact, active power environments common in automation, control panels, and DC power architectures.