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.

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. NPN General Purpose Amplifier This device is designed as a general purpose amplifier and switch. The useful dynamic range extends to 100 mA as a switch and to 100 MHz as an amplifier. Absolute Maximum Ratings* T A = 25°C unless otherwise noted 2N2907A Small Signal Switching Transistor PNP Silicon Features • MIL−PRF−19500/291 Qualified • Available as JAN, JANTX, and JANTXV MAXIMUM RATINGS Rating Symbol Value Unit Collector−Emitter Voltage VCEO −60 Vdc Collector−Base Voltage VCBO −60 Vdc Emitter−Base Voltage VEBO −5.0 Vdc Collector Current − Continuous IC −600 mAdc