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Re: Special considerations when sourcing replacement capacitors? #qmx


 

You need to watch out for the required voltage rating (If on the capacitor this will be specified as DC and the AC RMS value (if the maker bothered to specify one) may only be half of that).? In higher power RF applications low losses become more important?

Also 'ceramic' capacitors are available in a whole variety of materials,? some give a high capacitance for small size but that capacitance is ever-changing with temperature, applied voltage etc.? ? Others sing if the application has audio frequency pulses or ripple.? These types are only suitable for low size, low cost decoupling but I prefer them in? the rubbish bin?

Other materials? are more stable and of those some are even suitable for RF tuned circuits -but at a size and price cost

When you buy capacitors get them from reputable suppliers, keep them in part number marked packs and save the manufacturers data sheet

I'm unable to tell you what is already ' in your drawer' from here though

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