These capacitors are designed for use on DC supplies and are intended to protect the network from momentary voltage spikes and surges and for filtering out AC ripple. The self-healing capacitor elements are enclosed in a cylindrical aluminium case, which is filled with a vegetable oil based gel (resin, solid matter) that is non-toxic, biodegradable, environmentally friendly. The case is fitted with an overpressure disconnector and an M12 mounting stud, which is also used for the protective conductor connection. MKP metallized polypropylene capacitors encapsulated in Al case by polyurethan resin UL-94,V0, PCB and halogen free. Borna niroo karan company (Brnika) has the exclusive representative ZEZ SILKO company in buying, selling, consulting and distribution and industrial equipment of DC link (filtering) capacitors like as DC link cylindrical cases capacitors is active .