-KlostermanThe FK 265 MI 220 O with Heatsink is a molded electronic part manufactured by Fisher-Klosterman. It is available in four variants: TO218, TO220, TO247 and TO248, and has dimensions of 21mm in length, 13mm in width and 9mm in height. The heatsink helps to dissipate heat and keep the part within optimal operating temperatures. It is typically used for power amplifier, voltage regulator, rectifier and other commercial regulating applications.