The IG26X1300S4i from Laser Components is a Photodiode with Wavelength Range Cut off Wavelength: 2.45 µm, Capacitance 1040 pF, Dark Current 15 to 150 nA, Responsivity/Photosensitivity 0.7 to 1.36 A/W, Active Area Diameter 1300 µm. More details for IG26X1300S4i can be seen below.