Major application of these relays are in Controllers, Timers
and Counters -
Analog Blind Dial On Delay Timer
The footprint is very small, many can be stacked in one small
PCB. These can be used to signal bigger loads or
devices. They can take upto 2 A, so small heaters or
motors can be switched. It is better to use a fuse in series
with the output as a defective load can blow the SSR.
These are also used in Lighting Control - Computer Light Control
You can see in the PCBs below the distance between the input and output tracks is more than 5mm. The opto is itself a few kilovolts of isolation and we should take care of the creepage distance on the PCB and surface. Read more.
10th Jun 2020
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