In your searches, did you find a specification sheet for the S-203DS1? If so, once the relay's ratings are known it should be easy to find a replacement part; it may need to be adapted to the existing PCB connections but that will be simple. I did a quick search for a spec sheet but came up with nothing, maybe you had better luck?
The bridge rectifier will be very easy to find a replacement for (just check www.Digi-key.com) No worries on finding a replacement for that one.
--- In CAMMemail@example.com, "cadcamcreations" <cadcamcreations@...> wrote:
> Does anyone know the spec on these two components so I can replace them
> on my spindle motor controller board?
> They are :- Sharpe Solid state relay No. s-203DS1 and Bridge Rectifier 1G4B1. Ive tried to find these exact replacements but to no avail.
> Thanks in advance,Graham.