This part is a kind of semiconductor called BCR405U.

Function of this product has LED Driver.

Manufacturers : Infineon Technologies AG

Image and pinout :

Some of the text within the PDF file :

BCR405U LED Driver Features • LED drive current of 50mA • Output current adjustable up to 65mA with external resistor • Supply voltage up to 40V • Easy paralleling of drivers to increase current 4 5 6 3 2 1 • Low voltage overhead of 1.4V • High current accuracy at supply voltage variation • No EMI • High power dissipation of 750mW • Reduced output current at higher temperatures - Negative thermal coefficient of -0.2% / K • RoHS compliant (pb-free) small and robust SC-74 package • Qualified according to AEC Q101 Applications • Channel letters for advertising, LED strips for decorative lighting • Aircraft, train, ship illumination • Retrofits for general lighting, white goods like refrigerator lighting • Medical lighting • Automotive applica [ ... ]

BCR405U PDF Datasheet Download