This part is a kind of semiconductor called ASMT-QAB2-FDE0E.

Function of this product has Mid- and High-Power LEDs.

Manufacturers : AVAGO TECHNOLOGIES

Image and pinout :

Some of the text within the PDF file :

Solid State Lighting Mid- and High-Power LEDs, LED-Modules and Color Management Your Imagination, Our Innovation Sense • Illuminate • Connect Free Datasheet http://www.datasheetlist.com/ Solid-State Lighting Mid- and High-Power LEDs 0.5 Watt Mid-Power PLCC-4 Surface Mount LEDs Description The superior design of this high-reliability LED package is based on the industry standard PLCC-4 platform (3.2x2.8x1.9mm) and enables a higher drive current of 150mA. Higher drive current is possible due to the enhanced heat dissipation capability which also allows you to operate the LED at up to +110°C ambient temperature. The package is highly reliable and has a long lifetime with minimum degradation due to enhanced silicone resin material and the very low thermal resistance of only 60K/W (j [ ... ]

ASMT-QAB2-FDE0E PDF Datasheet Download