The G12183-210KA-03 from Hamamatsu Photonics is a Photodiode with Wavelength Range 0.9 to 2.55 µm, Capacitance 500 to 1000 pF, Dark Current 0.05 to 0.1 µA, Responsivity/Photosensitivity 1 to 1.3 A/W, Active Area Diameter 1 mm. More details for G12183-210KA-03 can be seen below.