Found 4 alternatives for TCST2103 by Vishay Semiconductor Opto Division. Optical Sensors Photointerrupters Slot Type Transistor Output — Slotted Module, 4-Lead Dual Row.
SENSOR OPT SLOT PHOTOTRANS MODUL
SENSOR OPT SLOT PHOTOTRANS MODUL
SENSOR OPT SLOT PHOTOTRANS MODUL
SENSOR OPT SLOT PHOTOTRANS MODUL