Eaton HKD3400 Molded Case Breaker is a 3-pole molded case circuit breaker (MCCB) rated for 400 A at up to 600 V, suitable for 50/60 Hz three-phase systems. Part of Eaton’s HKD family, it uses a K-frame (K Fr) configuration for compact installations in three‑phase panels. This MCCB provides overcurrent protection for electrical circuits, interrupting fault currents to help protect wiring and equipment in industrial and commercial applications.
