This part is a kind of semiconductor called NJSA172AT.
Function of this product has LED.
Manufacturers : NICHIA
Image and pinout :

Some of the text within the PDF file :
NICHIA STS-DA1-3158B NICHIA CORPORATION SPECIFICATIONS FOR AMBER LED NJSA172AT ● Pb-free Reflow Soldering Application ● Built-in ESD Protection Device ● RoHS Compliant SPECIFICATIONS (1) Absolute Maximum Ratings Item Symbol Absolute Maximum Rating Forward Current IF 450 Pulse Forward Current IFP 900 Allowable Reverse Current IR 85 Power Dissipation PD 1.55 Operating Temperature Topr -40~125 Storage Temperature Tstg -40~125 Junction Temperature TJ 150 * Absolute Maximum Ratings at TS=25°C. * IFP conditions with pulse width ≤10ms and duty cycle ≤10%. (2) Initial Electrical/Optical Characteristics Item Symbol Condition Forward Voltage Luminous Flux VF IF=350mA Φv IF=350mA Chromaticity Coordinate x y - IF=350mA - IF=350mA Thermal R [ ... ]
NJSA172AT PDF Datasheet Download
