2pcs FAIRCHIL H21B1 DIP-4 SLOTTED OPTICAL SWITCH Chip RH

1PCS/5PCS H21A3 SLOTTED OPTICAL SWITCH DIP4

(4) Onsemi H21B1 Optical Switch with Pigtail, Slotted Interrupter

50PCS H21B1 New Best DIP-4'SLOTTED OPTICAL SWITCH original

10pc for H21B1 New Best DIP-4'SLOTTED OPTICAL SWITCH original

10pcs for H21B1 New Best DIP-4'SLOTTED OPTICAL SWITCH original

qty10 for H21B1 New Best DIP-4'SLOTTED OPTICAL SWITCH original