I am looking at a power diode that only shows the "instantaneous" forward voltage drop across the diode at a specified current. Most other diodes show the "forward drop" (not the "instantenous" forward drop) with current.

My question is: How do I determine the "constant" forward voltage drop? Is this the same as the instantaneous drop?

I am looking at the Vishay FP30AB dual-diode. They show an "instantaneous" drop of 0.95V drop at 15A per leg. My circuit [a DIY UPS for computer systems] will draw a steady-state current, not instantaneous. Anyone know about this?

Thanks,

Dick