The 2N7000 is an N-channel, enhancement-mode MOSFET used for low-power switching applications.
The 2N7000 is a widely available and popular part, often recommended as useful and common components to have around for hobbyist use.
Packaged in a TO-92 enclosure, the 2N7000 is rated to withstand 60 volts and can switch 200 millamps.