The G12183-210K from Hamamatsu Photonics is a Photodiode with Wavelength Range 0.9 to 2.55 µm, Capacitance 400 to 1000 pF, Dark Current 0.65 to 6.5 µA, Responsivity/Photosensitivity 1 to 1.3 A/W, Active Area Diameter 1 mm. More details for G12183-210K can be seen below.