Hello.
We have a problem with the diode LL4148 (Vishay or Diotec, we use diodes from both manufacturers).
Sometimes diodes goes out of order in different unrelated PCBs. These PCBs have different topology and schematics. Therefore, the problem is unlikely related with voltage or current surges. Sometimes diodes split (break physically) after soldering, sometimes they go out of order (electrical breakdown) after few hours/days/monthes of work. Seems, that there is a little correlation with manual soldering (we still use it for small parties of PCBs).
Have anyone ever faced with a problem of diodes reliability in sod-80 (mini-melf) or particular with LL4148? Is glass sod-80 less robust then other types of cases? I'm thinking about changing LL4148 on another more reliable and robust case.