help needed in identifying this ceramic resistors property's its 1960 era and I cannot find any information on it in order to find a suitable replacement, eternally grateful if any one can point me in the right direction.

 

Labeled 220R 5% = 220Ω Why are you replacing it? Looks good from here...

 

Looks about 5 to 10 W by size too, but hard to judge without a dimension scale.

 

as simple as that! thank you SamR … its open circuit, (due to another fault) got a little hot, you can see what the heat has done to the relay sat to the right.

 

Did you remove one leg and test to see if it was open or just across it in-circuit? In-circuit it could be a short in the circuit. Opens don't tend to burn things up like a short will.

 

Did you remove one leg and test to see if it was open or just across it in-circuit? In-circuit it could be a short in the circuit. Opens don't tend to burn things up like a short will.

But a fault elsewhere could overheat the resistor and cause it to go open circuit. It is a wirewound resistor and they tend to be either the correct value or open circuit - they don't fail short circuit.

 

Not the resistor short Albert. Obviously resistors don't short. The circuit short elsewhere which when measuring across the resistor in-circuit may show as a short. I don't know why he suspects the resistor as it does not appear to have been burnt. It may not be a resistor problem. The only way to be sure is to pull one leg and measure across it. YMMV

 

Not the resistor short Albert. Obviously resistors don't short. The circuit short elsewhere which when measuring across the resistor in-circuit may show as a short. I don't know why he suspects the resistor as it does not appear to have been burnt. It may not be a resistor problem. The only way to be sure is to pull one leg and measure across it. YMMV

TS says it is open circuit - post #4

 

Is that melted section on the relay plastic (I hope)? When testing that resistor, I assume you got o.c. with your leads directly on the resistor's leads. Otherwise, it is possible the solder joints simply opened. This joint looks a little bad, for example:



EDIT: BTW, that logo appears to be VITROHM. If you can read the numbers below the value, there's a chance to identify the exact replacement part.

 

thanks guys, no it is still in circuit, yes I tested on the legs and it was open circuit, it was an external fault that caused the problem, this feeds a open cage 24 volt power transformer for the control panel switches, we think that due to the external short it had two phases across it so 415v … hence she got a little warm...… coils on transformer meter out ok, everything else seems to work, n just lost power to the switch gear, so looks like it done its job.

 

The bottom numbers or its physical dimensions will let you find the correct wattage on the VITROHM site. I would replace it with any brand of the correct resistance and same or greater wattage.