Hello everyone!
I have "boiled" my head trying to identify a Sot-23 part from a pcb driving an IGBT module on an inverter.
In different production batches they have used two different sot-23 parts so there are two markings starting with "E4" or "F1" to help identify the part number.
Also in both occasions the part appears on the pcb both pins 1 & 2 are connected which would indicate towards a dual diode. However if we measure between pins 1 & 3 there is a diode in both ways...
Both transistor LCR testers I have don't even recognize it and message "part unknown ..." appears.
There are photos of both places that the part is used on the pcb.
Thank you!