The MP-Si-8-TO8 from LD-PD Inc is a Photodiode with Wavelength Range 400 to 1100 nm, Capacitance 0.8 to 70 pF, Dark Current 1 to 60 nA, Responsivity/Photosensitivity 0.4 to 0.55 A/W, Active Area Diameter 8 mm. More details for MP-Si-8-TO8 can be seen below.