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Film Capacitors

Many low value capacitors (less than 1 microfarad) will have a plastic type of insulator (polyethylene, polypropylene...) between the plates. Sometimes the plates are actually a metallized layer bonded onto one side of the plastic material. Multiple layers of the metalized plastic material make up the capacitor. Adding layers or increasing the size of the layers (without increasing the thickness of the layers) will increase capacitance. The following diagram is an incredibly generic film capacitor. You can see the dark blue insulating film between the cyan and violet plates. The plates are soldered to one of the terminals on one end of the plates.

Semec can produce different type of Film capacitors. Including Mylar capacitor, Metallized Polyester Film capacitor, Metallized Polypropylene Film capacitor, X2 Capacitor and High Voltage Polypropylene Film capacitor. Welcome to send inquiries and check price with us. If you have any Technical questions, welcome to send email to tech@semectech.com.

Varistor External links

  1. Capacitor ESR
  2. Capacitor Leakage
  3. Capacitor and DC voltage
  4. Capacitors and AC voltage