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Old July 7th 05, 05:24 AM
Larry Benko
 
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Default Mechanical switch ratings

I have used some toggle switches as RF switches in the HF range
in the past without problems but want to use one in a somewhat
higher power application. Toggle switches generally are only
rated at voltages such as 120VAC (50-60Hz assumed), 250VAC
(50-60Hz again), or 30VDC. Looking at the specs for vacuum
relays show that a current derating of ~3X when going from 60Hz
to 30 MHz seems about average. Is there any reason why a
similar derating would not apply to a mechanical toggle switch.
E.g. would a miniture toggle switch rated at both 250VAC 2A
and 120VAC 5A handle 100W at 28MHz (50 ohm impedance assumed)?
I was not going to do any hot switching.

73, Larry W0QE
 
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