I have a power supply with multiple outputs (5v, 12, 24v) According to the manufacture (and after testing) there must be a minimum load on the PSU for it to supply the stated voltages. Without a minimum load the voltage can go up to 37V (which is very bad)
As I can't garentee that the system I'm building will use minimum W all the time, I've added 'dumb' resistors to do the job. They get really hot but I used a 20W resistor when I just need to 'consume' 2W.
After this, everything works fine.
But in order for me to sleep well at night I would like to guarantee that if one of these resistors would fail for any reason, the high voltage would not burn the electronics.
I have used a PTC for limiting current in the past but I would like to use a similar device to limit the voltage.
Is there such device? Can you recommend on a different solution? I can't change the PSU now as it was the only one available in a very short notice.