[Boatanchors] Resistor Size

[Mark Richards]

A curious look at a data sheet for a typical 2W metal film resistor from 
Vishay shows a 9mm length and 4mm diameter.  A 1/4 w carbon composition 
resistor from Vishay is around 7mm long by 4 mm diameter.

I'd check against the part number and data sheet to be sure, but suspect 
the technology allows for higher dissipation in a smaller size.

/k1mgy




On 04/29/2014 08:44, David C. Hallam wrote:
> I just received a a parts order from Mouser with a number of 2W 
> resistors I needed.  I normally order Xicon metal oxide but one size 
> came as Vishnay metal film.  These resistors are bout the size of a 
> 14/W carbon comp.  I just wonder how they could have a 2W rating for a 
> resistor that small.  The WV rating on them is 350V so I guess it's OK 
> to use them.  But they surely look small. I will have to recheck my 
> order to see if that is what I ordered or if Mouser substituted.
>
> David
> KW4DH
>