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I've read several posts where relay failure caused a considerable amount of

grief. In particular, the relay contacts welding closed due to current and

arching.

 

Has anyone considered or actually wired up their circuits so that the relay

contact simply supplies power to the gate of a HEXFET which requires a minuscule

current, and then have the HEXFET trigger the load at the load current?

 

The relay could be any desired arrangement, SPST, SPDT, 4PDT, etc. Each pole is

connected to a HEXFET gate and the remaining legs on the HEXFET go to ground and

the load.



I am asking if anyone has considered it or done it. I am not suggesting doing it.

 

Bill Gradwohl

IV-P Builder

N858B