This part is a kind of semiconductor called A1015.

Function of this product has Photo Interrupters.

Manufacturers : Panasonic Semiconductor

Image and pinout :

Some of the text within the PDF file :

Transmissive Photosensors (Photo Interrupters) CNA1015 Photo Interrupters Overview (2.5) Unit : mm 14.0 5.0±0.15 A 0.5±0.1 Device center 5.0 (C1) 10.0 min. 2.5 CNA1015 series is a transmissive photosensor series in which a high efficiency GaAs infrared light emitting diode is used as the light emitting element, and a high sensitivity phototransistor is used as the light detecting element. The two elements are arranged so as to face each other, and objects passing between them are detected. 10.0 A' (10.0) (4-0.45) Features Position detection accuracy : 0.3 mm Gap width : 5 mm The type directly attached to PCB 2 3 1 4 Absolute Maximum Ratings (Ta = 25˚C) Parameter Input (Light Forward current (DC) emitting diode) Power dissipation Collector current Reverse voltage (DC) Symbol [ ... ]

A1015 PDF Datasheet Download