About Us

film capacitor

Welcome to Shanrui Holding (HongKong) Company Limited.  Shanrui Holding has been specializing in film capacitor and ceramic capacitor's manufacturing since 1993.  All our products are SGS, IEC, ISO9001 and RoHS compliant.

For film capacitors,  Shanrui's capacitor's dielectric materials are polyester film, polypropylene film and the dielectrod is envaporated metal layer or Aluminum foil or Zine-Aluminum foil.  And the construction is wound or stacked.

For ceramic capacitors, Shanrui only focus on high voltage ceramic capacitor, including disc type and screwed (axial) type.

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Application

film capacitor

The difference between a capacitor and a battery is that a capacitor(film capacitor or ceramic capacitor) can dump its entire charge in a tiny fraction of a second, where a battery would take minutes to completely discharge. That's why the electronic flash on a camera uses a capacitor (film capacitor or ceramic capacitor) -- the battery charges up the flash's capacitor over several seconds, and then the capacitor dumps the full charge into the flash tube almost instantly. This can make a large, charged capacitor extremely dangerous -- flash units and TVs have warnings about opening them up for this reason. They contain big capacitors that can, potentially, kill you with the charge they contain.

 
  • Capacitors are used in several different ways in electronic circuits:
  • Sometimes, capacitors are used to store charge for high-speed use. That's what a flash does. Big lasers use this technique as well to get very bright, instantaneous flashes.
  • Capacitors can also eliminate ripples. If a line carrying DC voltage has ripples or spikes in it, a big capacitor can even out the voltage by absorbing the peaks and filling in the valleys.
  • A capacitor can block DC voltage. If you hook a small capacitor to a battery, then no current will flow between the poles of the battery once the capacitor charges. However, any alternating current (AC) signal flows through a capacitor unimpeded. That's because the capacitor will charge and discharge as the alternating current fluctuates, making it appear that the alternating current is flowing.
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