Yes understand that other parts may have been damaged by the arcing, just seems sad to throw it out and fit another (typical engineer) I still don't know why it blew in the first place. You mentioned spikes, but in the UK the supply mains is fairly constant. No other units popped and still function fine, but why these use slow responde diodes in the first place if this is a weak link.
Maybe just bad luck 
Thanks again for the help
R
Thank you for the kind response Thoebel,I hope this gets back to you... A superb answer as to why my unit may have failed. If I try to replace these diodes with faster response ones, could you advise which would / could be fitted. I've cleaned the unit and hope by replacing these diodes I can shed life back into it.
Kind regards
RM
Hi All
First time here in the forum and wanted to ask if anyone has had issues with the Shelly Dimmer 2 going bang without any demand on the output load
I've taken apart my unit and see on the (L) and (N) input lines there are two diodes which apear to rectify the incomming mains supply to one point on the PCB.
D1 has completely exploded causing all the soot inside all of the unit, Diode D14 on the neutrial side (N) appears short circuit, which may have been the cause of the failure to the Dimmer in the first place.
Has anyone here had the same issue? I'm just concerned as I've several of these units running on HA around the house and now worried of a fire while away
