2N3904/3906 2N4401/4403 2N5401/5551 SMD Equivalent is MMBT3904/3906 MMBT4401/4403 MMBT5401/5551
a) There are some part numbers follow a system that BC8xx is an SMD version of BC5xx.
b) Some part numbers follow a system BC8_x is a SMD version of BC5_x.
Some cross-reference suggests that the SMD versions of the 2SC1815 are available as the 2SC2712 (SOT-23), 2SC4738 (SOT-23), KTC3875 (SOT-23) and KTC3875S (SOT-23).
You have to compare the specifications in detail. Good luck!
Understanding the transistor nomenclature system will help you find the SMD version of a transistor much easier and much accurate.
The author was the global business manager of the Discrete division of National Semiconductor in Silicon Valley in the late ’80s.
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BC547 vs 2N3904 European versus American. Who is better ? From their datasheets BC547 with Vceo of 45V and Ic of 100mA ratings 2N3904 with Vceo of 40V and Ic of 200mA ratings BC547 with Vceo of 45V rating while 2N3904 is just 40V2N3904 with Ic of 200mA rating while BC547 is just 100mA There...
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