The S8664-10K from Hamamatsu Photonics is a Photodiode with Wavelength Range 320 to 1000 nm, Capacitance 4 pF, Dark Current 0.3 to 3 nA, Responsivity/Photosensitivity 0.24 A/W, Active Area Diameter 1 mm (Photosensitive). More details for S8664-10K can be seen below.