1N4554A,DIODE ZENER
1N4554B,
1N4554RB,
1N4555A,DIODE ZENER
1N4555B,
1N4555RB,DIODE ZENER 6.8V 500MW DO5
1N4556A,DIODE ZENER
1N4556B,DIODE ZENER 7.5V 500MW DO5