I have some S8050 transistors and was looking for the stats of them in the datasheet. I found some strange values for the Ib/Ic relation:

S8050 datasheet excerpt

Shouldn't the unit on the y-axis be A instead of mA? The datasheet of all S8050 subtypes have A on this axis. Ib 1.5 mA = Ic 0.25 mA would be a DC current gain of 0.167, as far as I understood.


1 Answer 1


It is an obvious typo. If you check Mouser - Fairchild SS8050, \$I_C\$ is in Amps.

Static Characteristics

  • \$\begingroup\$ I will flag this as the answer, as a current gain of < 1 does not make sense with a transistor. The 1:100 ratio or bigger seems to be correct. \$\endgroup\$ Mar 7, 2018 at 15:36
  • \$\begingroup\$ Lots of small errors occur in datasheets, mainly because they are created by graphic artists and technical writers and they can propagate as parts are sourced by different companies. \$\endgroup\$ Mar 7, 2018 at 17:40
  • \$\begingroup\$ Ok, never fully trust a datasheet is my lesson for today. That somehow reminds me of Lockheed Martin's metric confusion that shredded a 125 million dollar probe on mars back in '99. \$\endgroup\$ Mar 9, 2018 at 12:51
  • \$\begingroup\$ I wouldn't go that far. I'd say >99.9% of datasheets are accurate. Does the info make sense within the operation of the device? Typically, answered by common sense. At the end of the day, you are responsible for the decisions you make or don't make. \$\endgroup\$ Mar 9, 2018 at 14:27

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