1N4746A

This part is a silicon epitaxial planar Zener diode intended for stabilized power supply applications. It provides a nominal Zener voltage of 18 V with a 5% tolerance at a test current of 14.0 mA. The device is rated for 1.0 W power dissipation, 12 W surge power dissipation for a 10 ms pulse, and operation with junction temperatures up to 175°C. It is supplied in a DO-41 axial package and has a maximum reverse leakage current of 5 µA at 13.7 V. Maximum Zener impedance is specified as 20 Ω at the test current and 750 Ω at 0.25 mA.