The Siemens 4EU2732-0FW08-0BA0 is a 3-phase filter reactor rated 25 kVAR at 525 V, 50 Hz, with a 14% impedance (P) and a 134 Hz resonant frequency (FRES). It is designed for harmonic mitigation and power quality correction in industrial low-voltage networks, built to EN 61558.
The 25 kVAR rating at 525 V sets the reactive power compensation capacity — match this to the total detuned capacitor bank size in your power factor correction system. The 14% impedance (P) defines the detuning factor, shifting the resonant frequency below the 5th harmonic (typically to 134 Hz as listed), protecting capacitors from harmonic overloading. The 40 °C ambient rating (TA/ISOKL:40 /H) is the maximum operating temperature; above this, derating applies per the manufacturer's thermal curve. Flat-type terminals accept busbar or cable lugs — verify your lug width and bolt hole pattern against the terminal dimensions before ordering. The IP00 rating means no ingress protection; mount inside a clean, dry enclosure with adequate ventilation for heat dissipation.