TO-220 Resistor? Identification help

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https://uk.farnell.com/bourns/pwr221t-30-8r00f/resistor-thick-film-8ohm-1-to/dp/2328292?ost=232-8292

I was looking for an 8R resistor to act as a cheap, quick and simple dummy load/speaker replacement in a small amp circuit I'm working on.

I came across the one in the link above on the Farnell site in a TO-220 package. I've never seen that before - are they just 'normal' resistors? The data sheet describes them as thick film.

Curious! Thanks.

 

[FvM]

What are you particularly asking? These are "normal" resistors, but a heatsink is required to utilize the 30 W rating. You may be better off with a regular "air cooled" wirewound power resistor.

 

[treez]

Vishay DO A GOOD RANGE OF THOSE TO220 RESISTORS TOO...THEY ALSO DO A TO247 VERSION, a bit bigger for you....maybe you don't need heetsink then (sorry for capitals, )

You get thick film resistors and thin film resistors, whats the difference?, ...NOTHING to you or I!!!, you are only interested in the power rating and sometimes whether its inductive or not.

thin film resistors are usually of better tolerance than thick film, though not always...also "thin film" resistors are supposed to be lower noise than thick film resistors, though what on earth that means I have no idea, -I have never ever heard anybody say that thin film resistors should be used as current sense resistors in smps (as opposed to thick film resistors) because they are lower noise, so there's a lot of "old wives tail-ory" going on here.

YOU SOUND SURPRISED THAT A TO220 PACKAGE COULD BE USED FOR A RESISTOR, WHEN USUALLY THEY ARE USED FOR FETS.......don't be surprised though, as resistors come in all kinds of packages.

Heres one for you, do bathtub resistors need heatsinks of operated at their rated power level?......
**broken link removed**

 

[Audioguru]

The thick film resistor can dissipate 30W when its temperature is at its max of 150 degrees C or less and you cool its case to 25 degrees C somehow (liquid nitrogen?).
If you mount it on a heatsink in an air conditioned room then of course the heatsink will get warm or hot so you must reduce the power.