- Jan 1, 1970
Starbase said:I have a solid state relay but I can't get it to work.
It is a 25 amp 240v a.c. with 3 - 32v d.c. control. The problem is
when I connect the mains to post 1 it always delivers current to post
2 even with pin 4 and 3 shorted. The load I am driving is only in the
order of 0.04 amps (7k Ohm soenoid plus a neon indicator lamp), the
relay is not earthed but before I write it off as broken I am
wondering, is there a minimum load current? does the SSR need a
minimum (1-3v d.c.) off voltage, does it need to be earthed or is
there something else I should know. I will experiment further but in
the intrests of saving myself some time and possibly gain some
knowledge I though I would post here also.
These can leak a few mA, IIRC depending on which type of snubber network
they have inside. So it isn't necessarily broken. Other SSRs leak only
microamps or less, though. Maybe you should google for the datasheet, it
should state the off-state leakage current.