How to choose swiching current?
How to choose swiching current?
(OP)
I have to select a mechanical switch to switch 4 rs485 lines. I see that the short circuit current for a rs485 transceiver is 250mA, so I will need a switch for 1A continuous worst case.
But how do you figure what the switching current for the switch should be?
But how do you figure what the switching current for the switch should be?





RE: How to choose swiching current?
0.25A should be more than good enough, unless you've got some odd circuit problems. The Ios shouldn't be occurring on a regular basis, so there should no need to design for that with that much margin.
TTFN
RE: How to choose swiching current?
RE: How to choose swiching current?
Now taking about your case.... I doubt there are any switches that aren't rated for at least half an amp on the planet!
More importantly, you need a switch with gold contacts for your application.
RE: How to choose swiching current?
RE: How to choose swiching current?
http://www.lorlin.co.uk/m.htm
RE: How to choose swiching current?
RE: How to choose swiching current?
TTFN