1N989B/TR,VOLTAGE REGULATOR
1N989BE3,ZENER DIODE
1N989BE3/TR,VOLTAGE REGULATOR
1N990A,DIODE ZENER 160V 500MW DO7
1N990B,DIODE ZENER 160V 500MW DO7
1N990BUR-1,VOLTAGE REGULATOR
1N991A,DIODE ZENER 180V 500MW DO7
【Fairchild Semiconductor】1N991B,稳压二极管