I am trying to repair a battery charger with an alternistor driven front end and just a step down transformer and rectifier back end. T1 is shorted to the gate on this alternistor spec'd as a Q4025P. I must ensure that was I put back in will work. I also have some concern with the optocoupler due to the short but they are at the same potential? so is that really an issue? All series resistors are still good.
It was my understanding that all alternistors were made to only operate (maybe just turn on?) in quadrants 1-3? I was going to replace with a Q6025P5 by little fuse but was not sure by the data sheet if there would be a IV quadrant operation?
As well, the "5" on the end of the PN indicates a sensitivity of 50ma and the Teccor sheet indicates 80ma. I am not sure if the increase in sensitivity could be a concern?
It was my understanding that all alternistors were made to only operate (maybe just turn on?) in quadrants 1-3? I was going to replace with a Q6025P5 by little fuse but was not sure by the data sheet if there would be a IV quadrant operation?
As well, the "5" on the end of the PN indicates a sensitivity of 50ma and the Teccor sheet indicates 80ma. I am not sure if the increase in sensitivity could be a concern?