Why is the minimum load current for most Solid-state Relays specified at 0.1 A?Last Updated: September 19, 2018
For triac and thyristor output elements to stay ON, a small amount of current flow (called the holding current) is required. Considering the added effect of the ambient operating temperature, the output element may not be able to stay ON if the load current is less than 0.1 A. This may cause oscillations to appear in the output, or for it to not turn ON at all.
For example, if a load with a rated current of 50 mA is used and the OFF leakage current is 10 mA, the load current would be 20% of the rated load. Depending on the load, this may cause a reset error.