Timeline for Reason for 1/2 watt resistors marked as 2 watt resistors

4 events

when toggle format	what		by	license	comment
Dec 17, 2015 at 17:39	comment	added	supercat		@user1736936: Wattage is affected by surface area, heat conduction to the surface, maximum acceptable internal temperature, and maximum acceptable external temperature. Only if the maximum acceptable external temperature is the limiting factor would wattage increase proportional to extra surface area.
Dec 17, 2015 at 9:51	comment	added	Vinod		The wattage it can dissipate is proportional to the surface area. It does look like the surface area has increased more than 4 times by the casing. This is assuming the material is of high thermal conductivity.
Dec 17, 2015 at 9:11	comment	added	Autistic		Yes the wattage increases+1 but does it go up to 2 watts ? maybe but the surge current rating or peak power rating will be basicly the same as the original uncased resistor. Often people select those big resistors for the surge rating.People are more likely to wrongly estimate surge rating than continious rating .Those tortured wha fong resistors are poisonous.
Dec 17, 2015 at 7:57	history	answered	Curd	CC BY-SA 3.0