Looking at following datasheet: https://www.onsemi.com/pub/Collateral/2N5457-D.PDF

I'm puzzled as to why there are multiple "typical characteristic " (pairs of) charts. As far as my understanding goes, FETs are voltage controlled devices so why do we have multiple (and contradictory) values of drain current for given drain-source voltage and gate voltage? (figures 2, 4 and 6).

  • \$\begingroup\$ Note that each graph is for a different Vgs(off) value (aka pinch-off voltage), thus these graphs show the likely variation between devices from different batches. \$\endgroup\$
    – user16324
    Commented Jan 30, 2021 at 0:11
  • \$\begingroup\$ Wow, the differences are quite big! \$\endgroup\$
    – Bartosz
    Commented Jan 30, 2021 at 6:32

1 Answer 1


Since the part has a large variation in the gate-source cutoff voltage (see spec table), they have provided curves for 3 "typical" parts with different cutoff voltages.

Figure 4 may be the most typical, but if they only provided this curve, it could be misleading to the user.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.