Recommend a low thermal potential relay

sgll

Recommend a low thermal potential relay [Copy link]

Is there any expert who can recommend an electromagnetic relay with low thermal potential and contact potential less than 200nV?

chunyang

Then I'm afraid I'll have to look for pure gold contacts. Customization is certainly possible, but it's hard to say if you purchase from the general retail market.

sgll

chunyang posted on 2018-11-21 16:59 I'm afraid I have to find pure gold contacts. Customization is certainly possible, but it's hard to say if it's purchased in the general retail market.

I'm testing it now by soldering silver wires to the relay antennas. Later, I want to solder them to the printed circuit board. Will it introduce additional thermal potential?

chunyang

sgll posted on 2018-11-22 11:13 I am testing it by soldering silver wire on the relay contacts. Later, I want to solder it on the printed circuit board. Will it introduce additional thermoelectric potential?

As long as the additional thermoelectric potential is a constant or a specific function, it can be compensated by hardware compensation or software compensation. Because the contacts are easily affected by the environment and sparks and change locally, and the change is unpredictable, it is required to be a sufficiently inert material to avoid changes. It is difficult to compensate for non-constants.