The S10784 from Hamamatsu Photonics is a Photodiode with Wavelength Range 330 to 1040 nm, Capacitance 4.5 to 9 pF, Dark Current 0.01 to 1 nA, Responsivity/Photosensitivity 0.4 to 0.51 A/W, Active Area Diameter 3 mm. More details for S10784 can be seen below.