Circular Photodiodes Detect Radiation

Opto Diode Corporation introduces AXUV20A circular photodetectors for radiation, electron, and photon response in the ultraviolet (UV), extreme ultraviolet (EUV), through visible and near- infrared (IR) wavelength ranges. The circular device, with an active area of 5.5 mm in diameter features sensitivity to low energy electrons.


The AXUV20A photodiode shunt resistance is 100 MΩ, minimum. Reverse breakdown voltage is 5V, minimum, and 10V, typically. Other features include capacitance at 4 nF, typically, with a maximum of 10 nF, and a rise time of 2 µsec. The AXUV series of photodiodes exhibits response to electron energy levels as low as 100eV. For more specs, checkout the AXUV20A datasheet. To learn more about Opto Diode’s AXUV family of detectors that detect energy from 100eV to 50keV, visit the product page.

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