BZV55 series - Voltage regulator diodes MELF 2-Pin
Diode Zener Single 51V 2% 300mW 2-Pin SOD-323 T/R
Diode Zener Single 51V 2% 550mW 2-Pin SOD-323F T/R
BZX384-B56,115/BKN
BZX585-B68,115/BKN