What is the difference between 2N7000 and 2N7002 MOSFETs?
Question
What is the difference between 2N7000 and 2N7002?

Answer
One critical difference for me is that 2N7002 is definitely logic level trigger, 2N7000 is not so sure.


References
(1) 2N7000 / 2N7002 / NDS7002A N-Channel Enhancement Mode Field Effect Transistor - FairChild/On
(2) 2N7002 N-channel Logic Level MOSFET - Components 101 2019jan07
(3) 2N7002 (Vgs(th) min 1V, typ 2V, max 2.5V) Datasheet - NXP 2011sep08
(4) 2N7000/2N7002, VQ1000J/P, BS170 N-Channel 60-V (D-S) MOSFET - Vishay
(5) What is the meaning of “Logic-Level Gate Drive” for the MOSFET? - Toshiba
(6) Logic Level MOS Field Effect Transistor - NTE
(7) OptiMOS 5 and IR MOSFET 60V/80V/100V Logic Level - Infinion
(8) Power MOSFET Driving Big Motor Problem - tlfong01 RpiSE 2019feb09

Appendices
Appendix A - Why Logical Level Vgs(th) is critical to me hobbyist?

In my old 5V Arduino days playing with N-Channel power MOSFET such as IRF540N, I found that its Vgs(th) is well above my 5V Vcc, of the order of 7V.  The EE guys then invented clever things called &quot;charge pump&quot; to pump up a cap to 7V to trigger the power MOSFET switch.

I was too lazy to DIY any charge pump and so I gave up, leaving my batch of IRF540N lying in the junk bin to collect dust.  My IRF540Ns did stay in the junk bin for 10 years or so, then I heard the good news that new generation power MOSFET's are &quot;logical level&quot; which means Vgs(th) is approx 3V or lower.

And so I threw away my IRF540Ns and got IRL540Ns.  I found my Rpi 3V3 logical level GPIO pins can now directly switch them, at least for 500mA of the max rating of some 50+A, with very low Rds(on).



Appendix B - Logical Level Power MOSFET Characteristics
I mainly use N-Channel Power MOSFER such as IRL540N for low current swtiching.  For Rpi 3V3 logical GPIO pins, I can already switch up to 6A, so I am happy to use it.  I know other users hope to use 1V8 logical level trigger, and there are more and more such MOSFETs coming out.  I am showing two cases below.