【Fairchild Semiconductor】H21LOB_Q,光电断续器 INTERUP OPTOLOGIC
H21LOI,SWITCH INTERRUPTER OPEN INV-OUT
【Fairchild Semiconductor】H21LOI_Q,光电断续器 INTERUP OPTOLOGIC
H21LTB,SWITCH INTERRUPT TOTEM BUFF-OUT
H21LTI,SWITCH INTERRUPTER TOTEM INV-OUT
【JST】H21P-SHF-AA,
H21UL,控制开关 2 n.o. 1 n.c. contacts, UL489
H21UM,控制开关 2 n.o.,1 n.c. contact, UL508
