BZT52x Plastic-Encapsulate Zener Diodes Rectron BZT52x Plastic-Encapsulate Zener Diodes feature low Zener impedance, high stability, high reliability, and 500mW power dissipation. These diodes operate at 0.9V forward voltage (VF) at 10mA forward current (IF) and -65°C to 150°C storage temperature range. The BZT52x diodes are available in SOD-123 and SOD-323 small-outline plastic packages.