Adafruit
Bipolar Transistor Kit - 5 x PN2222 NPN and 5 x PN2907 PNP
Transistors are powerful little electronic switches, and we really like these NPN and PNP transistors whenever we need to control medium-power electronics, s...
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Transistors are powerful little electronic switches, and we really like these NPN and PNP transistors whenever we need to control medium-power electronics, such as small motors, solenoids, or IR LEDs. We find them so handy we threw together a mix-and-match bag of PN2222 and PN2907! You get 5 x NPN and 5 x PNP, very handy for your class B amplifier, high or low side control, LED strips, what-have-you.
Each transistor is a general purpose amplifier with a standard EBC pinout.
- PN2222 (same pinout as the 2N3904) can switch up to 40V at peak currents of 1A (not continuously, just peak!), with a DC gain of about 100.
- PN2907 can switch up to 60V at peak currents of 600 mA (again, not continuously, just peak!), with a DC gain of about 100.
They're basically your garden-variety bi-polar transistors, and do the job with class!
Jargon buster
Plain-language definitions for the technical terms used above.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
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