I have an old computer with a broken Miniscribe 8425SA hard disk. One of the capacitors has burned out, and need some help finding a replacement. Here are my questions:
It appears there are similar capacitors on the board which are marked "-A- 22uF 16V 89 2 8" (see pics below). What does the "A" code mean? I think I understand the rest (capacitance, voltage rating, date code?)
What ESR should I get? Is the lower the better?
The capacitor appears to be 6.5mm X 4mm. So the size code would be something like 6540?
Is there anything I can do to make this less likely to burn out in the future? Higher voltage rating, say 25V? Different capacitor type? It appears tantalum capacitors are finicky and fail catastrophically.
Top view with identical (?) component
Side view, it looks like the capacitor was connected to the 12V rail.
Length of duplicate, in mm.
Width of duplicate, in mm.