I'm working on a project and need some .1 and .22uF polypropylene film caps and .1uF polyethylene film caps; the problem is that digikey has no polypropylene caps in this size at all! And the polyester caps they have have a 10-item minimum quantity. What could I substitute?
Could you share your application requirements with us and possibly explain why you think one dielectric would be better then another in your application? I'm not saying all caps (of the same value) are the same, but there is a lot of misconceptions, hype, myths, etc. One only has to look at the DIY golden ear audiophile crowd to see that many are being encouraged to waste a lot of money on some very questionable properties, which some questionable suppliers are only too happy to supply at outrageous prices.
Again I'm not disputing that some caps do have properties that suit some applications better then other types, ESR, high frequency characteristics, etc. but often this is overblown or just not required in most applications.
Lefty