In switching circuits, these FETs can be used much like bipolar junction transistors, but have some advantages: The 2N7000 has been referred to as a "FETlington" and as an "absolutely ideal hacker part." The word "FETlington" is a reference to the Darlington-transistor-like saturation characteristic.Ī typical use of these transistors is as a switch for moderate voltages and currents, including as drivers for small lamps, motors, and relays. The 2N7002 is in a TO-236 package, also known as "small outline transistor" SOT-23 surface-mount, which is the most commonly used three-lead surface-mount package. The 2N7002 is a similar part with the same electrical characteristics as the 2N7000 but different package. The BS170 can switch 500 mA, with a maximum on-resistance of 5 Ω at 10 V Vgs.
Packaged in a TO-92 enclosure, both the 2N7000 and BS170 are 60 V devices. The BS250P is "a good p-channel analog of the 2N7000." The 2N7000 is a widely available and popular part, often recommended as useful and common components to have around for hobbyist use. They are sometimes listed together on the same datasheet with other variants 2N7002, VQ1000J, and VQ1000P. The 2N7000 and BS170 are two different N-channel, enhancement-mode MOSFETs used for low-power switching applications, with different lead arrangements and current ratings. The 2N7002 variant is packaged in a TO-236 surface-mount package.
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