We are using this surge protection circuit on 16VAC transformers. What we found is that the 500mA fuse tends to open circuit regularly. There is never a sign of surge presence as there is no other reported damages to household equipment. We tried a slow-blow fuse but although less complaints there is still fuses that blow unnecessary.
Has anyone got some advise for me. Is this circuit at fault or wrong components causing it to function at lower Voltages?
I would appreciate some advice