GoGreenElectricsLTD
Member
Now that you've explained what the switch will be used for it's apparent the circuit I proposed would probably need some modification. For example, the supply to the voltage reference may need a decoupling cap, some hysteresis may need to be added, and if the switched load has any significant inductance there should be a freewheel diode from Q1 collector to the +15V line.
The switched load has no inductance at all. Infact all it is switching is another electronic circuit. Presently I have it controlled by an ACS200-CD-F which is a current controled switch. The new circuit is an addition and would go inline with the existing current controlled switch.