BZV55 series - Voltage regulator diodes MELF 2-Pin
Zener Diode, 18V V(Z), 2%, 0.5W
Zener Diode Single 15V 2% 30Ohm 500mW 2-Pin Mini-MELF T/R
Zener Diode Single 18V 5% 45Ohm 500mW 2-Pin Mini-MELF T/R