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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).

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  • \$\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

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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.

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