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  2. 2N3904 - Wikipedia

    en.wikipedia.org/wiki/2N3904

    The 2N3904 is a common NPN bipolar junction transistor used for general-purpose low-power amplifying or switching applications. [1] [2] [3] It is designed for low current and power, medium voltage, and can operate at moderately high speeds. It is complementary to the 2N3906 PNP transistor. Both types were registered by Motorola Semiconductor in ...

  3. Bipolar junction transistor - Wikipedia

    en.wikipedia.org/wiki/Bipolar_junction_transistor

    Simplified cross section of a planar NPN bipolar junction transistor. BJTs consists of three differently doped semiconductor regions: the emitter region, the base region and the collector region. These regions are, respectively, p type, n type and p type in a PNP transistor, and n type, p type and n type in an NPN transistor.

  4. 2N3906 - Wikipedia

    en.wikipedia.org/wiki/2N3906

    The 2N3906 is a commonly used PNP bipolar junction transistor intended for general purpose low-power amplifying or switching applications. [1] [2] It is designed for low electric current and power and medium voltage, and can operate at moderately high speeds. It is complementary to the 2N3904 NPN transistor. [3]

  5. Texas Instruments Power - Wikipedia

    en.wikipedia.org/wiki/Texas_Instruments_Power

    A TIP31 an NPN bipolar transistor and TIP32 is the complementary PNP transistor. TIP31 transistors are designated as TIP31A, TIP31B, TIP31 to indicate increasing collector-base and collector-emitter breakdown voltage ratings. The TIP31 is packaged in a TO-220 case.

  6. BC108 family - Wikipedia

    en.wikipedia.org/wiki/BC108_family

    BC108 family transistors from various manufacturers (ITT, CEMI, ATES, Siemens) The BC107 , BC108 and BC109 are general-purpose low power silicon NPN bipolar junction transistors found very often in equipment and electronics books/articles from Europe, Australia [ 1 ] and many other countries from the 1960s.

  7. 2N2907 - Wikipedia

    en.wikipedia.org/wiki/2N2907

    The 2N2907 (PNP) and 2N2222 (NPN) are complementary transistor pairs. [4] Other types of transistors with different properties and connections have different part numbers. The prefix of each part number varies for each physical package type. Pin connections vary with different part numbers.

  8. Extrinsic semiconductor - Wikipedia

    en.wikipedia.org/wiki/Extrinsic_semiconductor

    The most common BJTs are NPN and PNP type. NPN transistors have two layers of n-type semiconductors sandwiching a p-type semiconductor. PNP transistors have two layers of p-type semiconductors sandwiching an n-type semiconductor. Field-effect transistors (FET) are another type of transistor which amplify current implementing extrinsic ...

  9. 2N107 - Wikipedia

    en.wikipedia.org/wiki/2N107

    The 2N170 was priced slightly higher than the 2N107. The 2N170 was a fallout from the 2N167, 2N168 and 2N169 transistor lines. In the 1950s, General Electric distinguished their PNP and NPN transistors by their case styles. PNP transistors had the round, black "top hat" style body, while NPN transistors had oval, black "top hats".

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