[sdiy] SMD resistors

[harrybissell]

Hi Fredrik

If you have the room for a 1206, you'd be better off using one.
The single body will dissipate MUCH more power than the four
smaller elements.

Usual rule of thumb... running a resistor at more that 1/2
the rated power will burn your thumb  :^P

(It really depends on how hot you can stand to let the part get)

I did not see complete specs on that data sheet, btw.  Designed for
termination as it is, I'm sure they did not expect that anyone would
be pushing the power rating.

H^) harry

Fredrik Carlqvist wrote:
> 
> Hi everybody!
> 
> I'm going to use a 1206 package with four 603 resistors inside with a
> power rating of 1/16W per element. That's 1/4 W for the whole package.
> 
> How hot will it get at the maximum power?
> 
> The maximum temp is specified to +125C, and the max ambient temp at
> +70C. Derating starts at +70C. Does this mean that it will run 55C
> hotter than ambient at full power?
> 
> Data sheet here:
> http://www.elfa.se/pdf/60/06040349.pdf
> 
> Thanks,
> 
> Fredrik C