The zener diode is a sharpely breakdown voltage diode which permits it to flow of current in the reverse direction when the voltage is above a certain value known as the breakdown voltage.

Features of 1N748 3.9V 400mW Zener Diodes:

• Nominal Zener Voltage (Vz): 3.6V
• Maximum Regulator Current (Izm): 0.095A
• Max. Reverse Leakage Current (Ir): 0.010mA
• Forward Voltage Drop (Vf): 1.5V
• Total Power Dissipation (Ptot): 500Mw

Applications of 1N748 3.9V 400mW Zener Diodes:

• It is used for voltage regulation.