描述：Silicon NPN Phototransistor. PACKAGE HAS NO POLARITY: NOTE PIN SHAPES! Long pin is Emitter. TEFT4300 is a silicon NPN phototransistor with high radiant sensitivity in black, T-1 plastic package with daylight blocking filter. Filter bandwidth is matched with 900 nm to 950 nm IR emitters. Vishay device page: https://www.vishay.com/product?docid=81549 Datasheet: https://www.vishay.com/docs/81549/teft4300.pdf