1/4W Resistor in 1/8W size?

[falco_femoralis]

I just ordered some of these in 820R, 1K, and 10K, and selected 1/4W thru the filters, and they are as small as an 1/8W resistor. Is this weird?

The description for these lists 1/4W and it matches up with my invoice. Just trying to find out if I have to look out for this in the future with other brands etc etc

https://www.mouser.com/ProductDetail/TE-Connectivity-Holsworthy/LR0204F820R?qs=sGAEpiMZZMsPqMdJzcrNwmqCbm4q8Q%252BC6LgGxLLtOWk%3D

 

[owlexifry]

yeah gotta check those datasheets.

a while ago i ordered some 1W resistors for an amp build and they ended up being 1/4W size. wasn't stoked about it but eh, it happens.

 

[Caedarn]

I did the same thing a few months ago. I didn’t realize that 1/4 W resistors came in that smaller size. I don’t recall which brand they were, but I will be checking the size for sure going forward.

 

[darwin999]

Yes, I've bought some as well. They're fine, and even very useful when you have to parallel two resistors to make a resistance value you don't have. I will note that very few of our circuits in normal operation generate enough current to get these resistors even close to 1/4 watt. So while they may look odd next to larger 1/4W resistors, they work just fine.

Note added: P = V^2/R. Hence, even if you put the full 9 volts across the resistor (which we rarely do), it has to be ≤324 ohms for the power to be ≥¼ watt.