Do you have an idea how to identify this faulty zener diode? It's from automotive PCB and it was marked as "ZD" on PCB. It is damaged (0Ohms in both directions) so
SOLVED: Is R ZD1 Vin ZD2 D1 ZD3 From the circuit above, the Zener voltage of ZD1,ZD2 and ZD3 are 5.1, 4.7 and 3.3V respectively, The forward bias voltage of D1 is
MA2C18500E datasheet - Specifications: Diode Type: Standard ; Voltage - DC Reverse