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WIMA has some polypropylene SMD caps<br>
<a class="moz-txt-link-freetext" href="http://www.wima.com/EN/products_smd.htm">http://www.wima.com/EN/products_smd.htm</a><br>
<br>
Steve<br>
<br>
</div>
<blockquote
cite="mid:CA+u0JtkuxxZJRLNTT7+PoFNNOuRgJyijUqN7o+o2bLjngAOoTw@mail.gmail.com"
type="cite">
<div dir="ltr">so, nobody ever chimed in here? I'm interested as
well. I like Polypropilene and Mica for filters for example, but
haven't been able to find them in SMT</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Wed, Apr 5, 2017 at 12:33 PM,
cheater00 cheater00 <span dir="ltr"><<a
moz-do-not-send="true" href="mailto:cheater00@gmail.com"
target="_blank">cheater00@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Hi guys,
<div>What is your preferred type of smd capacitors for audio
circuits? I don't mean oscillators (those get NP0/C0G
caps), but all that other stuff, including amplifiers,
filters, voltage rail decoupling, and ac coupling (output
caps). I'm mainly interested in 0603, 0804, 1206
footprints.</div>
<div><br>
</div>
<div>Obviously larger values might need to be (some form of)
cans with smd footprint, so if you have a favourite of
that type, mention that too.</div>
<div><br>
</div>
<div>This is not about bypass capacitors used in digital
circuits (eg the x7r kind).</div>
<div><br>
</div>
<div>The main points for the smaller (0603-1206) caps might
be:</div>
<div><br>
</div>
<div>- available as smd, 0603 is best (this kind of parts is
in a sweet spot being cheaper than larger or through-hole
counterparts)</div>
<div>- no microphonics</div>
<div>- little temp co</div>
<div>- low esr</div>
<div>- available in relatively large-ish values (1206 if
necessary)</div>
<div>- low capacitance loss induced by dc bias</div>
<div>- good for audio</div>
<div>- not insanely expensive</div>
<div><br>
</div>
<div>I'm interested in both your favourite dielectric type,
and specific manufacturers or model families.</div>
<div><br>
</div>
<div>What sorts of values do you normally use in those
applications? (It's enough to mention ranges like "between
.1 uF and 100 uF", listing every value would naturally be
too much trouble for people answering)</div>
<div><br>
</div>
<div>Thanks</div>
<br>
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<br>
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<div><br>
</div>
-- <br>
<div class="gmail_signature" data-smartmail="gmail_signature">Quincas
Moreira<br>
Test Pilot at VBrazil Modular</div>
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