BZV55 series - Voltage regulator diodes MELF 2-Pin
Zener Diode 5.1V 0.4W 2-Pin O-LELF-R2
Zener Diode 5.6V 2% 500mW Surface Mount O-LELF-R2
Silicon Zener Diode 5.6V 0.4W 2-Pin O-LELF-R2