Received wisdom is that one should use an inverse-parallel diode or perhaps a series diode of adequate PIV, but what actually happens if you don't but current is limited?
I found this at
"Thus the peak inverse voltage (p.i.v.) is quoted in their specification as the voltage below which they will not breakdown. The reverse breakdown of diodes has its uses as a voltage reference or for protection purposes. It is possible to recover from the breakdown situation as long as the diode has not been overheated, i.e. burnt out, by excessive power dissipation. Thus a series resistor must be used to limit the current flow through the diode."
True or false?
Boldly going, I've a 2v yellow (5v max PIV) running off a 55v transformer, with 2.35k of series resistance. Calculated If about 22mA. Still alive after
4 hours, but will it do long-term damage?Meter reading shows 35v across the resistor, so average current (both ways)
15mA and a fairly high avalanche(?) voltage.