Taiwan semiconductor bzv55c series smd zener diodes 500mw mini melf taiwan semiconductor bzv55c3v9 l1 a 500mw 39v zener diode designed for use as a voltage regulator the zener diode is supplied in a surface mounting ll 34 mini melf package that is suitable for automatic pick and place manufacturing taiwan semiconductor bzv55c3v9 zener diode 39v 500mw mini melf