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The 2N3055 is a silicon NPN power transistor intended for general purpose applications. It was introduced in the early 1960s by RCA using a hometaxial power transistor process, transitioned to an epitaxial base in the mid-1970s. Its numbering follows the JEDEC standard. It is a transistor type of enduring popularity.〔 〕〔 〕〔 〕 ==Specifications== The exact performance characteristics depend on the manufacturer. Packaged in a TO-3 case style, it is a 15 amp, 100 volt, 115 watt power transistor with a β (forward current gain) of 20 to 70 at a collector current of (100 to 200 when testing using a multimeter〔). It has a transition frequency of 3.0 MHz; at this frequency the calculated current gain (beta) drops to 1, indicating the transistor can no longer provide useful amplification in common emitter configuration. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「2N3055」の詳細全文を読む スポンサード リンク
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