What This Filter Reactor Is — and What the Ratings Mean for Your Panel
The SIDAC 4EU3032-8MA08-0AA0 is a 3-phase filter reactor — a line reactor — built to sit between your drive and the motor leads, or on the line side of a VFD, knocking down harmonic distortion and limiting inrush current. Rated 55.4 A continuous, with a maximum of 61.6 A, it's sized for a motor load around that amp draw on a 400 V, 50 Hz supply. The 14% relative throttling factor means it drops about 14% of line voltage at rated current — that's enough to clean up harmonics from a 6-pulse drive without starving the motor of torque. Inductance is 0.0021 H, and the reactive power of the filter bank is rated 40,000 var. Out here in the grease, that 40 kvar figure tells you it can handle the reactive power from a decent-sized drive without overheating. Power loss runs 269 W at full load — that's heat you need to vent. The unit is IP00, so it's an open-frame choke meant for a clean, dry cabinet, not a washdown area. Thermal class H insulation (rated for 180 °C hot-spot) gives it headroom in a warm enclosure, but you still need airflow. Ambient temperature rating is 40 °C; push past that and you'll want to derate or add forced ventilation. Termination is via flat connector / screw-type terminals on the main circuit — no quick-connects, no ring lugs. Plan for a screwdriver and a torque wrench on the install. Dimensions: 0.3 m wide, 0.269 m tall, 0.211 m deep. That's about 12 by 10.6 by 8.3 inches — it'll eat some real estate on the backplate or DIN-rail assembly.
Where It Goes — Deployment Context
This filter reactor goes in a motor control center or drive panel, typically on the input side of a variable-frequency drive to meet IEEE 519 harmonic limits, or on the output side to protect motor windings from reflected wave voltage spikes on long cable runs. The IP00 rating means it's strictly indoor, cabinet-mounted — no outdoor or washdown duty. The 134 Hz resonant frequency of the filter means it's tuned to avoid the common 5th and 7th harmonic frequencies from a 6-pulse rectifier, so it won't sing or overheat when those harmonics are present.