MMSZ4686 is a half-watt, general-purpose, medium current surface mount Zener diode manufactured by Fairchild Semiconductor Corporation. It has a SOD-123 package with the same footprint as the mini-melf (LL-34) glass package, providing a convenient alternative to the leadless package. The product has a 500mW rating on FR-4 or FR-5 boards and a Class 3 ESD rating (>16kV).