The G12182-020K from Hamamatsu Photonics is a Photodiode with Wavelength Range 0.9 to 2.1 µm, Capacitance 1000 to 2000 pF, Dark Current 500 to 5000 nA, Responsivity/Photosensitivity 1 to 1.2 A/W, Active Area Diameter 2 mm. More details for G12182-020K can be seen below.