Bridge Rectifier Selection

[FireFly]

I've been looking into selecting a one-piece square bridge rectifier for the 30V/3A power supply project.  There seems to be lots of these like every other component type!  Generally, they seem to have rather heavy voltage/amperage handling abilities.

What is the downside to using a bridge with significantly higher ratings than required besides slightly higher cost and larger physical size?

Would a bridge with just adequate specs put out more heat than one with much greater than required specs?

[Ldanielrosa]

A higher rated bridge will more easily tolerate voltage transients and startup surges.  Also it may have a slightly lower voltage drop.