Lenze 387069 EZN3A0900H004 3-Phase Mains Choke

The Lenze 387069, designated by model code EZN3A0900H004, is a 3-phase mains choke from the EZN series engineered for power conditioning on industrial variable frequency drive AC supply lines. Featuring a rated inductance of 9.0 mH and a continuous current capacity of 4.0 A, this line reactor functions as an inductive filter positioned between the incoming power grid and downstream drive electronics. Operating on 3-phase supply networks up to 480 V AC, the component is frequently deployed alongside Lenze 8200 Vector series inverters to smooth input current waveforms, mitigate grid harmonic distortion, and protect drive power stages from transient voltage spikes.

Integrating the EZN3A0900H004 line reactor into a machine enclosure involves straightforward 3-phase power wiring between the AC supply mains and the inverter input terminals. As a passive inductive component, the reactor requires no software parameterization, firmware setup, or rotary switch configuration prior to operation. When replacing a damaged unit, commissioning requires securing the IP00 module within a protective control panel, ensuring correct terminal connection torque, and confirming phase alignment. Maintenance teams can rely on ABC Industrial Parts for acquiring ready-to-install replacement units to minimize operational downtime.

As a purely passive power accessory, the EZN3A0900H004 contains no active electronic diagnostics, LED status indicators, or fault code displays. Operational checks focus on verifying input phase symmetry, inspecting physical terminal connections for thermal tightness, and checking winding insulation integrity following major grid disturbances. Internal electrical breakdown or physical winding failure caused by severe line surges cannot be serviced in the field and requires a direct unit swap. Sourcing a tested replacement through ABC Industrial Parts ensures rapid restoration of system power filtering and long-term inverter protection.