[vortalexfan]

Originally Posted by jr_tech

If it follows the numbering scheme used on this example, the last two digits are a date code (perhaps the first month of 1987 ?)

https://www.mouser.com/datasheet/2/3...BA-1202965.pdf

Perhaps the 40 indicates 400 volt?

just a WAG,
jr

Well I ordered some diodes from mouser that had similar specs to the original rectifier bridge (which I did find a spec sheet for an S40 type S1WB rectifier bridge), so we'll see what happens when it gets here, I had also replaced one of the main filter caps (the 4.7 uF 200 VDC filter cap) that tested bad (had extremely high ESR value of 15k ohms.)