JFET
This configuration, quite common in this section, was found in a 90s American documentation. The JFET can be of any type of general use.
In the figure we have a simple timer with the 555 feeding a relay directly. The circuit is from...
ON Semiconductor NTMJS1D5N04C 40V Industrial MOSFET Available from Mouser Electronics, these ON...
To control relays safely with double insulation, we suggest the circuit in the figure. The optical...