The power rating of a diode is defined as the maximum value of power that can be dissipated without failure if V f is the forward biased voltage and I f is the forward biased current.
Pd= V f x I f.
The power rating of a diode is defined as the maximum value of power that can be dissipated without failure if V f is the forward biased voltage and I f is the forward biased current.
Pd= V f x I f.