What this filter reactor does on the line
The SIDAC 4EP4300-4MS00 is a 3-phase filter reactor rated for 31.6 A continuous at 400 V AC, 50 Hz. Its 5.67 % relative throttling factor and 0.0015 H inductance are sized to attenuate harmonic currents from variable-frequency drives or other non-linear loads, keeping distortion off the supply side. The 210 Hz resonant frequency of the filter means it targets the 5th harmonic (250 Hz) region common in 6-pulse rectifier front-ends.
Ratings that decide the fit
The 31.6 A rated current is the continuous thermal limit at 40 °C ambient with Class B insulation. The maximum current of 35.1 A is the overload ceiling — sustained operation above the rated value requires derating. The 104.2 W power loss at full load is the heat that must be dissipated; in an IP00 enclosure that means free-air convection inside the panel, so verify clearance to adjacent components. The 20 kvar reactive power rating defines the compensation bank size this reactor is paired with.
Mounting and connection
The 4EP4300-4MS00 measures 0.267 m wide by 0.221 m high by 0.12 m deep. Main circuit connections are via screw-type terminals or tab terminals — no special tooling required. The IP00 rating means it is an open-frame component intended for installation inside a grounded, lockable enclosure. Panel layout must account for the 104.2 W heat dissipation and maintain clearance for airflow.