Surface Mount Capacitor Type

Jun 18, 2006 5 Replies

Hello!



I=B4m looking for ceramic surface mount capacitor..., but when i consult some catalogs, i find that there is a "type"..., something like: NP0, X7R, Y5V.......



Someone knows what=B4s the meaning of this "types"?, how could influence my desing?



Many thanks



Andros.



P=2ED: Excuses for my english...



It's the dielectric.

How that might influence you depends on the application.

Graham

Your English is actually better than some supposed English speakers !

Graham

Those types specify the temperature characteristics of the dielectric

- how the capacitance changes with changes in temperature.

NPO changes very little with temperature - you would want that if the capacitor was used in a timing circuit.

X7R changes quite a bit with temperature - they're fine for power supply bypass and similar applications.

Peter Bennett, VE7CEI peterbb4 (at) interchange.ubc.ca new newsgroup users info : http://vancouver-webpages.com/nnq GPS and NMEA info: http://vancouver-webpages.com/peter Vancouver Power Squadron: http://vancouver.powersquadron.ca

Note also that ceramic dielectrics other than NP0 have non-linearities.

Graham

I´m looking for ceramic surface mount capacitor..., but when i consult some catalogs, i find that there is a "type"..., something like: NP0, X7R, Y5V.......

Someone knows what´s the meaning of this "types"?, how could influence my desing?

Many thanks

Andros.

P.D: Excuses for my english...

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If you want more information than you have already been given, here is a nice paper.

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