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Metal Film vs. Carbon film resistors
Gene Pederson
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#1

02-19-2014, 12:10 AM
Are there specific applications for the two types, or is it a matter of personal preference between these resistors?

I have been buying the metal film type. Now I am in need of some 75K and 750K which I have found at Mouser. So I am wondering which to get.

Thanks for any input.

Gene
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morzh
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#2

02-19-2014, 10:00 AM
metal film is good and cheaper than carbon.
I like metal oxide as it is the cheapest and at 5% tolerance has the highest working temp up to 200 C (metal film - up to 155C). Metal film has better stability over temperature.
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Arran
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#3

02-20-2014, 02:27 AM
I've noticed that often one is cheaper then the other depending on the resistance value, both are far cheaper then carbon comp resistors though.
Supposedly they also have voltage ratings, but I have never had a 1/2 Watter arc over in any radio that I repaired so I guess the 400 v rating is high enough.
Regards
Arran
(This post was last modified: 02-20-2014, 02:33 AM by Arran.)
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Gene Pederson
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Posts: 309
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#4

02-20-2014, 02:37 PM
Thanks for the replies!

Gene
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Bob Andersen
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#5

02-20-2014, 02:52 PM
Standard 1/2 metal film are rated for 350 volts, but you can also get them at 500 and 700 for about the same price.

Here is Mouser's selection of 1/2W, 700v metal film resistors.
http://www.mouser.com/Passive-Components...pyZ1z0x85h
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  1. The PHILCO Phorum
  2. Various and Sundry Categories
  3. Other Radios (Non-Philco)