This part is a kind of semiconductor called BF304-0UR-024B.

Function of this product has Miniature Based LED Lamps.

Manufacturers : LEDTRONICS

Image and pinout :

Some of the text within the PDF file :

Miniature Based LED Lamps LEDTRONICS, INC. THE FUTURE OF LIGHT 23105 Kashiwa Court, Torrance, CA 90505 Phone: (800) 579-4875 or (310) 534-1505 Fax: (310) 534-1424 E-mail: webmaster@ledtronics.com Website: www.ledtronics.com Once limited to simple status indicators, Light Emitting Diodes (LEDs) now play prominent roles in back lighting, panel indication, decorative illumination, emergency lighting, animated signage, etc The emergence of LEDs as a viable alternative to incandescent lighting can be attributed to new manufacturing technologies, packaging innovations and an increasing number of colors. These factors along with the growing awareness of the advantages of LEDs (e.g., a life span measured in years not hours, vivid sunlight-visible colors and low power re [ ... ]

BF304-0UR-024B PDF Datasheet Download