The BZX79-C12.133 is a Zener voltage regulator diode produced by Nexperia. It is a single-diode voltage regulator that provides a stable voltage reference source. It has a maximum power dissipation of 500 mW, a surge current rating of 15 A, and a maximum operating temperature of 150°C. The diode features a voltage tolerance of 5%, a zener voltage of 12.133 V and a volumetric efficiency of 1.4%. The BZX79-C12.133 is available in a DO-35 package, making it suitable for a variety of applications, including DC/DC converters, linear regulators, transient suppressors, and AC/DC rectifiers.