Resistor rating

[CraigR]

Having a little trouble finding the rating for this shorted resistor. The 5 bands are such: Black, Blue,Silver,Gold,Green

[R_J]

Re: Resistor rating

Could it be green,blue,silver ? that would be 0.56 ohm, your resistor is fine its not shorted its just a low value

0.6 ohm 5% temp coef 20

[CraigR]

Re: Resistor rating

Nope. it could be Green,Gold,Silver,Blue Black

[R_J]

Re: Resistor rating

Black = 0
Blue = 6
Silver = X0.01 or 10% tolerance (it has no numeric value)
gold = X0.1 or 5% tolerance (no numeric value)
green = 5 or .5% tolerance or if the 5th band 20 tep coef.

Are you sure its a resistor and not an inductor (coil)?

[CraigR]

Re: Resistor rating

Ok, then it must be ok and not shorted like I thought.
Thanks!

[budm]

Re: Resistor rating

FYI: resistor usually goes open circuit, not shorted out especially the MOX type like you have. That resistor is connected the Source pin of the MOSFET?
What are you fixing any way?

[eccerr0r]

Re: Resistor rating

I hope this doesn't turn into a "what color is that dress" thread. Fortunately only EE's and technicians would be interested.

There are a lot of rules on resistor bands to help against reading wrong.

1. The first band is never black. The guides may hint at black possibly could be first, but it is never black => if it is black, this is the last band instead of first.
2. Second band is never metallic.
3. If third band is metallic, that's a multiplier and not a significant figure

Inductor significands should not be metallic either!

So this should be:
green (yeah it looks like very poor green)-blue-silver-gold-green

56 as significand is a "E12 standard value" for 10% or better resistors so this is another check.

Despite this all I can get from the bands is that it's a 0.56 ohms 5% Flameproof and I don't know what the green is (probably temp coefficient)


So I have more resistors, what are the values of these resistors?

My guesses (select to see them...):

0.1Ω 5% 1W CC (blue band = ?)
1.0Ω 5% 1W CC
0.12Ω 5% 1W FP
2.7Ω 5% 1W FP
4.7Ω 5% 1W CC

0.47Ω 5% ¼W FP (white band = ?)
0.2Ω 5% 1W FP (note: first significand might be brown...)
3.3Ω 10% ½W CC
5.6Ω 5% ½W FP
1.5Ω 5% ½W ?FP

CC=carbon composite (catch on fire or smoke when overloaded)
FP=flameproof (opens up without fire)