2N7000 is TO-92 case, this time a enhancement mode MOSFET, good for switching 60V at 200mA. The power to the circuit is turned off by the pins of the microcontroller, etc., without the use of actual switches or relays.The 2N7000 is a low power transistor and the 2n7002 can handle 2 watts in free air (40 watts with a heatsink attached to its metal tab).2N7000 NFET, for can handle 200 mA, which is enough for lightweight applications. It does have the advantage of having Vgs threshold below 3V.Here is an application example. Note flyback diode to suppress back EMF from an inductive load. This simple configuration is called a low side switch. basically controlling the ground connection for the load.The 2N7000 and BS170 are N-channel, enhancement-mode MOSFETs used for low-power switching applications. The two are nearly identical except that the leads are arranged differently and the current ratings are somewhat different; they are sometimes listed together on the same datasheet, along with other variants 2N7002, VQ1000J, and VQ1000P.
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