These capacitors which have been designed especially for harmonic ﬁltering in three-phase mains stand out by their high AC-voltage load capacity and suitability for high rms and surge currents. Thanks to their construction they have a very low series resistance and a small self-inductance. The three capacitor elements are connected in delta internally; liquid resin ﬁlling serves for improved heat dissipation. The ﬁnger-proof screw terminals of designs L and M (rated IP20) make for simpler connections. Very good self-healing characteristics and the integrated overpressure protection (break-action mechanism) ensure safe operation and controlled disconnection in the event of overload or failure at the end of operating life. The standard design has a capacitance tolerance of ± 5 . Tighter tolerances are available on request.