Bipolar Transistors | NPN & PNP Transistors | RS
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    Bipolar Transistors

    Bipolar Transistors are a solid state, three-pin devices made from three layers of silicon. A bipolar transistor is designed to amplify current, bipolar transistors can also function as a switch. There are two main types of transistor, PNP (positive negative positive) or NPN (negative positive-negative).

    How a Bipolar transistor is made

    Bipolar transistors are constructed by joining two signal diodes back to back creating two PN junctions connected in series, sharing a common P or N terminal. By nature, silicon does not normally conduct electricity well. However, when silicon is treated with certain chemicals or impurities we can make the material and electrons behave in a different way. This process is called doping. The doping process improves the semiconductors ability to conduct electricity.

    How do bipolar transistors work?

    Bipolar transistors have two possible functions, switching, and amplification. Due to the devices three layers of doped semiconductor material, supplying the transistor with a signal voltage enables the discrete component to act as an insulator or a conductor. This clever change provides the transistors with two basic functions, switching (digital) electronics or amplification (analog) electronics.

    Transistors are available in panel, surface and through-hole mounting options in plastic package or metal can versions. All have three terminals or pins, the Base, the Collector, and the Emitter.

    They are also available as;

    • Digital transistors - are made of a semiconductor material, usually silicon, which conducts the current (or electricity) with little resistance. They also tend to have at least three terminals for easy connection to an external circuit.
    • UJT transistors - constructed of a bar of lightly dope N type silicone with a small piece of heavily doped P type material attached to one side. Since the silicon bar is lightly dope it has very high resistance.

    Applications of bipolar transistors?

    Transistors are one of the most widely used discrete components in electronic designs and circuits. Transistors are used for the amplification of all types of electrical signals in circuits made up of individual components rather than ICs (integrated circuits).

    5463 Producten voor Bipolar Transistors

    onsemi
    NPN
    8 A
    250 V
    TO-220AB
    Through Hole
    2 W
    -
    Single
    250 V
    5 V
    30 MHz
    3
    1
    Nexperia
    NPN
    600 mA
    40 V
    SOT-223 (SC-73)
    Surface Mount
    1.15 W
    100
    Single
    75 V
    6 V
    300 MHz
    4
    1
    DiodesZetex
    NPN
    3 A
    45 V
    SOT-223 (SC-73)
    Surface Mount
    -
    500
    Single
    45 V
    5 V
    -
    3 + Tab
    1
    ROHM
    PNP
    -3 A
    -50 V
    SOT-89
    Surface Mount
    500 mW
    180
    Common Emitter
    -50 V
    -6 V
    100 MHz
    3 + Tab
    1
    onsemi
    NPN
    8 A
    250 V
    TO-220AB
    Through Hole
    2 W
    -
    Single
    250 V
    5 V
    30 MHz
    3
    1
    onsemi
    NPN
    600 mA
    30 V
    TO-92
    Through Hole
    625 mW
    -
    Single
    60 V
    5 V
    100 MHz
    3
    1
    onsemi
    NPN
    150 mA
    50 V
    TO-92
    Through Hole
    400 mW
    120
    Single
    60 V
    5 V
    1 MHz
    3
    1
    DiodesZetex
    NPN
    3 A
    60 V
    SOT-223 (SC-73)
    Surface Mount
    2 W
    100
    Single
    80 V
    5 V
    175 MHz
    3 + Tab
    1
    DiodesZetex
    NPN
    300 mA
    400 V
    SOT-223 (SC-73)
    Surface Mount
    2 W
    100
    Single
    400 V
    5 V
    50 MHz
    3 + Tab
    1
    Nexperia
    NPN
    1 A
    60 V
    SOT-89
    Surface Mount
    1.35 W
    30
    Single
    70 V
    5 V
    100 MHz
    3
    1
    Nexperia
    NPN
    1 A
    45 V
    UPAK
    Surface Mount
    1.25 W
    63
    Single
    45 V
    5 V
    180 MHz
    4
    1
    onsemi
    -
    -
    -
    TO-92
    Through Hole
    350 mW
    -
    Single
    -
    -
    -
    3
    1
    onsemi
    -
    -
    -
    TO-92
    Through Hole
    350 mW
    -
    Single
    -
    -
    -
    3
    1
    onsemi
    NPN
    4 mA
    25 V
    SOT-23
    Surface Mount
    225 mW
    60, 120
    Single
    30 V dc
    3 V
    100 MHz
    3
    1
    DiodesZetex
    NPN
    6 A
    100 V
    SOT-223 (SC-73)
    Surface Mount
    3 W
    100
    Single
    200 V
    6 V
    130 MHz
    3 + Tab
    1
    onsemi
    NPN
    600 mA
    40 V
    TO-92
    Through Hole
    625 mW
    -
    Single
    60 V
    6 V
    250 MHz
    3
    1
    Nexperia
    NPN
    1 A
    20 V
    SOT-23 (TO-236AB)
    Surface Mount
    480 mW
    350
    Single
    30 V
    5 V
    100 MHz
    3
    1
    onsemi
    NPN
    15 A
    80 V
    TO-220AB
    Through Hole
    1.8 W
    20
    Single
    90 V
    5 V
    5 MHz
    3
    1
    Nexperia
    PNP
    -2 A
    -20 V
    SOT-23 (TO-236AB)
    Surface Mount
    480 mW
    225
    Single
    20 V
    5 V
    100 MHz
    3
    1
    Nexperia
    NPN
    1 A
    80 V
    SOT-89
    Surface Mount
    1.35 W
    63
    Single
    100 V
    5 V
    180 MHz
    3
    1
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