MMBT3904-7-F

MMBT3904-7-F is a Diodes Incorporated NPN general-purpose transistor in a SOT-23 package, rated at 40 V collector-emitter voltage and 200 mA collector current, with hFE of 100 to 300 and a transition frequency of 300 MHz — the surface-mount 2N3904-class device for switching, logic interfacing, LED driving and small-signal amplification. Diodes lists this code as Active: the variant discontinued under PCN-2822 is the -79 packing variant, and this code is the official replacement Diodes names for it, so the -7-F is the orderable form to carry on the BOM. Selection advice: MMBT3904 is sold under several packing and grade suffixes that are not interchangeable on paper — quote the full MMBT3904-7-F code, and check the gain at your actual collector current rather than designing to the headline hFE range, since gain falls off toward the current extremes. Against the onsemi MMBT3904LT1G also listed here, maker datasheets govern: same function, different vendor documentation and packing codes. Parameters verified against Diodes Incorporated documentation.