R
redbelly
- Jan 1, 1970
- 0
I've tried Googling to answer a question, but had no luck.
Mechanical switches often have a "VA" rating and I am trying to
understand why. Shouldn't there simply be a current rating? With the
switch closed, the voltage drop across the contacts is practically nil;
I would think there would be some maximum current it can handle,
regardless of the open circuit voltage. Could someone explain why a VA
rating is appropriate?
Thanks,
Mark
Mechanical switches often have a "VA" rating and I am trying to
understand why. Shouldn't there simply be a current rating? With the
switch closed, the voltage drop across the contacts is practically nil;
I would think there would be some maximum current it can handle,
regardless of the open circuit voltage. Could someone explain why a VA
rating is appropriate?
Thanks,
Mark