Bipolar Transistors

Bipolar Transistors

Bipolar Transistors

Bipolar Transistors

Bipolar transistors use both electrons and electron holes as charge carriers, allowing a small current injected at one of its terminals to control a much larger current flowing between two other terminals, making the device capable of amplification or switching.

Bipolars have a Base, Collector, Emitter:
Bipolar Transistor Symbols - NPN - PNP

Do you see the arrow on the emitter? An easy way to remember which round:

  • NPN – Not Pointing iN
  • PNP – Pointing iN

These are the very simplest form of the transistor, but are a great place to start, and are easy to get using. If you need help, check out our blog or contact our technical team via email for support.

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  • 00521-1__50720__17172 00521-1__50720__171721

    Transistor - NPN, 2N3904, Common BJT - TO-92

    Sparkfun

    £0.75
    Transistor - NPN, 2N3904, Common BJT - TO-92 These are very common, high-quality BJT NPN transistors.Designed for use as general-purpose amplifiers and switches. The useful dynamic range extends to 100mA as a switch and to 100 MHz as an amplifier...
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  • PPCOM-08928_main

    Transistors - NPN, BC547, Bipolar BJT - TO-92

    Sparkfun

    £0.32
    Transistors - NPN, BC547, Bipolar BJT - TO-92 These are high-quality BJT NPN transistors that work well with audio applications, switching and amplifying Specifications: Transistor Polarity: NPN Collector-Emitter Voltage V(br)ceo: 45V Transition...
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