The 2SB794-AZ is a PNP small-signal bipolar transistor from the * series, classified as a small-signal device for low-current amplification and switching roles. It is used in general-purpose analog circuits such as pre-amplifier stages, signal switching, driver interfaces, and current mirrors where a PNP polarity is needed.
That suits low-volume builds, prototype runs, or manual-insertion assembly where a reel feeder is not used. For automated pick-and-place, you will need to transfer the parts to a compatible carrier or order a tape-and-reel variant if one exists in the * series.