This part is a kind of semiconductor called AD100-8.

Function of this product has Photodiode.

Manufacturers : First Sensor

Image and pinout :

Some of the text within the PDF file :

# 500011 First Sensor APD Data Sheet Part Description AD100-8 TO Order # 500011; 501171 Version 28-10-11 # 501171 Features • APD with 0.008 mm² active area • 100 µm diameter active area • High gain at low bias voltage • Fast rise time, low capacitance • Optimum gain: 50-60 Description Circular active area APD chip with 100 µm diameter. Metal can type hermetic TO52 package with clear glass window. Two TO52 types available, customization on request. Application • Laser range finder • High speed photometry • High speed optical communications • Medical equipment RoHS 2002/95/EC Absolute maximum ratings Symbol Parameter Min Max TSTG TOP Mmax Storage temp Operating temp Gain (IP0 = 1 nA) -55 125 -40 100 200 IPEAK Peak DC current 0.25 Unit °C °C mA Schematic [ ... ]

AD100-8 PDF Datasheet Download