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2N3904 datasheet, 2N3904 pdf, 2N3904 data sheet, datasheet, data sheet, pdf Nov 30, 2015 · The main difference is in Ft; typically 1100MHz for the SS9018 and 300MHz for the 2N3904. There are different rules-of-thumb for amplifiers; one says that Ft should be five times the required upper frequency. On that basis the 2N3904 is suitable for up to about 60MHz whilst the SS9018 will serve at over 200MHz. 2N3904 Absolute maximum ratings Ta=25 °C Characteristic Symbol Ratings Unit Collector-Base voltage VCBO 60 V Collector-Emitter voltage VCEO 40 V Emitter-base voltage VEBO 6V Collector current IC 200 mA Collector dissipation PC 625 mW Junction temperature Tj 150 °C Storage temperature range Tstg-55~150 °C 2SB56 Transistor Datasheet pdf, 2SB56 Equivalent. Parameters and Characteristics 2N2222 datasheet, 2N2222 pdf, 2N2222 data sheet, datasheet, data sheet, pdf It is a little more powerful than the 2n3904. Most likely the current gain is less, and and maybe also the maximal voltages. Depending on your application that may be OK, which is quite likely if it is not too demanding. The correct thing would for you to check the numbers in the data sheet.