metal film and carbon resistors

[multimeter]

are using metal film ok for replacing carbon ones?,what is the difference,metal film better quality?,im getting a load for stock e24 values and the in between values ,all are metal film 1% resistors

[budm]

Re: metal film and carbon resistors

You can learn more here:
http://www.resistorguide.com/tag/resistor-types/

[PeteS in CA]

Re: metal film and carbon resistors

At a general level, metal film parts are better quality than carbon film. Better precision (down to .1% tolerance or better), better temperature coefficient (resistance change with temperature) (carbon film, IIRC, is 250ppm/*C; metal film can be 25ppm/*C or better). Metal film of the more generic 1% or 2% variety cost a little more than carbon film, but unless you're buying by the million, you may not notice.

The geekasoid life form in me winces when I see carbon film resistors in modern electronics, but realistically, if you're talking about 4.7K pull-up resistors being bought by the 100Ks or Ms, 1% or 2%, 100ppm parts offer no performance or reliability advantage.

I wonder how many here besides me has seen and used a 20% tolerance carbon composition resistor?

[budm]

Re: metal film and carbon resistors

I do use carbon comp due to high pulse tolerance for our equipment.
https://cdn.badcaps-static.com/pdfs/...e2efc27a2a.pdf

[PeteS in CA]

Re: metal film and carbon resistors

Carbon comp resistors look likely to retain a certain niche for applications where the resistors have to withstand occasional high energy pulses. My company uses several carbon comp resistors that are in surface-mount packages - almost a technological oxymoron.