OPB871N51

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 Module, Pre-Wired

得捷:
SENS OPTO SLOT 3.18MM TRANS C-MT

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

艾睿:
Photointerrupter Transmissive 3.18mm Phototransistor 4-Pin

Allied Electronics:
Sensor, Slotted Optical Switch, 3.18mm Slot, 2V Emitter, 30V Detector, 30 mA