Open access research data supporting "Characterisation of the Medipix3 detector for 60 and 80 keV electrons." accepted for publication in Ultramicroscopy, XXth May 2017. Authors J.A. Mir, R. Clough, R. MacInnes, C. Gough, R. Plackett, I. Shipsey, H. Sawada, I. MacLaren, R. Ballabriga, D. Maneuski, V. O'Shea, D. McGrouther*, and A.I. Kirkland *-denotes corresponding author This work was supported by EPSRC grant EP/M009963/1 (Fast Pixel Detectors: a paradigm shift in STEM imaging). Dataset contains: (i)Raw binary data files, 12-bit depth, for electron events and images of flat-field and the knife-edge at 60keV in SPM & CSM modes (ii)Raw binary data files, 12-bit depth, for electron events and images of flat-field and the knife-edge at 80keV in SPM & CSM modes (iii)Raw binary data, 24-bit depth, depicting the diffraction pattern of figure 15 (iv) Raw binary data, 12-bit depth, depicting the images in figure 16 Raw binary data files, (*.mib extension) with 12-bit depth can be opened using the freely available imageJ package(https://imagej.nih.gov/ij/) using the following parameters: File, Import, Raw Image type: 16-bit Unsigned Width: 256 pixels Height: 256 pixels Offset to first image: 384 bytes Number of images: 1 Gap between images:384 bytes (not necessary for single images) Raw binary data files, (*.mib extension) with 24-bit depth can be opened using the freely available imageJ package(https://imagej.nih.gov/ij/) using the following parameters: File, Import, Raw Image type: 32-bit Unsigned Width: 256 pixels Height: 256 pixels Offset to first image: 384 bytes Number of images: 1 Gap between images:384 bytes (not necessary for single images) Total dataset size is 8.15 Gb