Can Zener diodes be wired in parallel? I have some zener diodes diodes with Vout = 5.1 Volts and Izm= 80 mA. In a USB circuit I am designing, for an output of 500mA, the Iz = 88 mA which is above the Izm value. If I wire 2 zener diodes in parallel; will this give me an Izm of of 160mA? But will it regulate the current at 2*5.1 - 10.2 Volts?