What is the formula to calculate power of transistor?

[nareshgtr]

Transistor power rating

hi guys,
I found 1W, 2W transistors with same current rating. How it is possible. What is formula to calculate power of transistor.
Thanks advance
V. Naresh Kumar.

 

[bws]

Transistor power rating

if they have the same current rating, they proberly have different voltage span rating, so the effekt will be different !!!

 

[nareshgtr]

Re: Transistor power rating

sorroy Mr.BWS, I didn't get.....diffferent voltage rating span means.... do you mean different Vce(sat)

 

[malik_123]

Transistor power rating

different voltage span means that one transistor can handle greater voltage then the other one

 

[bws]

Re: Transistor power rating

sorroy Mr.BWS, I didn't get.....diffferent voltage rating span means.... do you mean different Vce(sat)

yes thats what i mean

 

[nareshgtr]

Re: Transistor power rating

thanks BWS........

 

[R00KIE]

Transistor power rating

Or maybe a different casing .... bigger casings will help dissipate or conduct more heat to the outside I guess.