# Resistor Value Identification Help

#### Namestaken

Dec 20, 2016
3
I have searched around the internet, used a plethora of online tools, and I'm at a complete loss as to what value this resistor is supposed to be. It's a 5-band, thin-film resistor with color codes: Yellow - Violet - Green - Gold - Green. I can post a picture, if anybody wants to see it.

I find this to be 47.5 Ω and 0.5% tolerance. It is on a 120V line so I expect the rating to be > 300W. I can't even find a resistor with these ratings online. When I test it with my multimeter, it registers as 4.7M Ω. Another multimeter that maxes at 2000K Ω doesn't register it at all.

It feels like too much of a coincidence to be wrong but I can't figure out how 4.7M is the correct value. Can anybody else shed some light on this?

Thank you very much for your help!

#### Alec_t

Jul 7, 2015
3,649
Yellow, violet, green = "4, 7, 5" = 47x10^5 = 4.7MΩ.

#### Namestaken

Dec 20, 2016
3
I agree if it was 4-band but I thought 5-band was like this:

#### davenn

Moderator
Sep 5, 2009
14,297
I agree if it was 4-band but I thought 5-band was like this:

View attachment 30974

except green isn't a valid tolerance band colour so the gold is your tolerance and the green may be a voltage rating or something ... cannot find a reference

EDIT .... OK found this

note the comments ... "If band 4 is gold or silver, then it is the tolerance band and the 5th band is a temp coefficient rating

Dave

Last edited:

#### Namestaken

Dec 20, 2016
3
Beautiful! I wish I had found that on my own. I truly appreciate both of your help in understanding. I trusted my meter, I just wanted to bridge the gap between what it was telling me and my previous understanding. This tidbit seems to be missed by a lot of online resources.

#### BobK

Jan 5, 2010
7,682
How does one mark a five band resistor of < 100Ω then?

Bob

#### davenn

Moderator
Sep 5, 2009
14,297
How does one mark a five band resistor of < 100Ω then?

Bob

note the 4 band is the multiplier and the 5th band the tolerance ... limited to BN, RD, GLD, SI or BL

the more it's looked into the more crazy it gets, as some manufacturers don't stick by the standards and come up with their own ideas for
band 4 and band 5. eg Mullard

#### BobK

Jan 5, 2010
7,682
But that chart clearly shows the fourth band gold as a multiplier of 0.1 And I have seen other charts that show green as a 0.5% tolerance.

Bob

#### davenn

Moderator
Sep 5, 2009
14,297
But that chart clearly shows the fourth band gold as a multiplier of 0.1 And I have seen other charts that show green as a 0.5% tolerance.

Bob

yes, that is correct

as I said there are some manufacturer variations
you can see them on that page to link to

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