The PD43-03 from Roithner Lasertechnik is a Photodiode with Wavelength Range 3600 to 4100 nm, Capacitance 1300 to 2600 pF, Dark Current 1 to 6 mA, Responsivity/Photosensitivity 0.6 to 1.2 A/W, Active Area Diameter 0.3 mm. More details for PD43-03 can be seen below.