600 pz 30 Valore 1/2 W 0.5 W Diodo Zener Box Kit 2V2.2V2.4V3V3.3V3.9V4.7V5.1V5.6V6.2V6.8V7.5V 8.2V9.1V10V11V12V16V20V22V2730V39V