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.
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 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.