Fischer-Elektronik-Aluminium-Heat-Sink-Mount-Bolt-On-TO-220-TO3P-Fischer-Elektronik-SK-409-25-4-STS-p-The-Fischer-Elektronik-Aluminium-Heat-Sink-Mount-Bolt-On-8-2-C-W-TO-220-TO3P-is-a-semiconductor-heat-sink-also-available-in-either-bolt-on-or-clip-on-mounting-types-in-a-selection-of-thermal-resistances-and-suitable-for-use-with-TO-220-and-TO-3-P-packaged-devices-The-all-alloy-heatsinks-have-a-3mm-thick-mounting-plate-and-have-a-black-anodised-finish-that-maximises-radiative-thermal