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What is this resistor wattage?

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stubie_do

New Member
Hi all a question for a Wizard.

I am trying to find out the wattage of a certain resistor that is fitted to the PCB board of a washing machine.

The resistor, which has blown, has 100R 10% written on the side. I have attached 2 images if it helps.





If you can help it would help!
 

crutschow

Well-Known Member
Most Helpful Member
The resistor is apparently 100 ohms ±10%, and I estimate it's power rating at about 2W.

To determine the power rating exactly just measure its size and buy a power resistor that's at least as large physically.
 

ericgibbs

Well-Known Member
Most Helpful Member
Many thanks for the reply, I'll go and do some shopping!
hi,
If the 100R has burnt to open circuit.?? I would also check that transformer located in the centre of the lower image.

It looks as though its been cooking as well.
 

stubie_do

New Member
Right, next question, can anybody point me in the direction for one of these resistors.

I've had a look and can't seem to find any?
 

crutschow

Well-Known Member
Most Helpful Member
Did you look on Google? Digikey, among others, carries many brands.
 

stubie_do

New Member
Yeh did try Google and then Digikey and found some.

One last question, based on the measurements (using micrometer: 5.70mm x 14.30mm) it shows the resistor to be a 1 Watt and not 2W. The 2W would be to big in length. Is it safe to say that the 1 Watt one is the one. I'll be taking the risk :)
 

crutschow

Well-Known Member
Most Helpful Member
Yeh did try Google and then Digikey and found some.

One last question, based on the measurements (using micrometer: 5.70mm x 14.30mm) it shows the resistor to be a 1 Watt and not 2W. The 2W would be to big in length. Is it safe to say that the 1 Watt one is the one. I'll be taking the risk :)
It apparently is a 1W then. I was was just guessing from the estimated size in the picture. So you should be safe to replace it with another 1W.

But do you know what caused it to fail? If you don't then a new one is likely to fail also since those resistors are unlikely to fail unless they are overloaded.
 

Mr RB

Well-Known Member
It's a 2W fusible resistor, they are the same size as 1W standard resistors.

You must replace it with a 2W fusible type! They are a little hard to get you may have to go to a supplier that sells to the TV repair industry.

And yes it usually blows when there is a massive current overload caused by some other problem. :)
 
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