The MM3Z5B6-AQ is a single diode from Diotec consisting of a Zener, 0.3W power rating, 5.6V breakdown voltage, in an SMD package with a reel-tape format. It is made in the SOD323F package, a small, low-profile surface mount package. It is designed for use in many electrical applications, including voltage regulation, power supply clamping, and circuit protection.