OPB871T51TX

光学开关（透射型，光电晶体管输出） Slotted Opt. Switch

Optical Sensor Through-Beam 0.125" 3.18mm Phototransistor PCB Mount

得捷:
SENSOR OPT SLOT PHOTOTRAN PCB MT

贸泽:
光学开关（透射型，光电晶体管输出） Slotted Opt. Switch

艾睿:
Photointerrupter Transmissive 3.175mm Phototransistor 4-Pin

Allied Electronics:
Sensor, Slotted Optical Switch, 3.18mm Slot, 2V Emitter, 50V Detector, 100 mW