Darlington Pairs | Transistors | ULN2003A | RS
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    Darlington Pairs

    Darlington pairs, also known as Darlington Transistors are discrete semiconductor devices consisting of a package of two standard BJT transistors (bipolar junction transistor). One of the transistors is high-gain while the other is high current. RS offer a wide range of high-quality Darlington Transistors from leading brands including ON Semiconductor, STMicroelectronics, Texas Instruments and Nexperia.

    How do they work?

    The emitter of one transistor is connected to the base of the other transistor which effectively creates one transistor. They are used to amplify weak signals from one circuit to another circuit or microprocessor. This means that the tiny current from a sensor or microcontroller I/O pin can be amplified to drive a large load. Darlington pairs can also be operated as an ON/OFF switch. Darlington pairs work together as a single transistor but feature a much higher current gain. They also offer high input impedance in comparison to single transistors.

    Why should you use a Darlington pair?

    Darlington pairs provide a very high current gain. Working as two transistors within one package, Darlington pairs have a very compact footprint which takes up minimal space on a (PCB) printed circuit board.

    What applications would you use them in?

    With high current gain, Darlington transistors are well suited to power applications such as driving motors and relays. Darlington pairs are ideal for application in display drivers, audio outputs, power regulators, light sensors, touch sensors and power supply outputs. It is not recommended to use them in applications that require high frequency as it is not possible to shut the base current off immediately.

    What are the different types?

    • Darlington pairs can consist of either NPN (negative-positive-negative) transistors, PNP (positive-negative-positive) transistors or both.
    • Darlington pairs are typically supplied in one of two ways. You can purchase them as an array (called a Darlington array) within a single integrated circuit (IC) package, or as a simple single discrete component.

    Standard package type examples include SOT-23, SOIC, TO-220 and TO-252 (DPAK)

    459 Products showing for Darlington Pairs

    Toshiba
    NPN
    6 A
    400 V
    5 V
    TO-220SIS
    Through Hole
    3
    Single
    -
    2
    100
    2.5 V
    600 V
    2 V
    20µA
    onsemi
    PNP
    5 A
    100 V
    5 V
    TO-220AB
    Through Hole
    3
    -
    Single
    1
    1000
    -
    100 V
    4 V
    0.2mA
    onsemi
    NPN
    50 A
    120 V
    5 V
    TO-204
    Through Hole
    2
    -
    Single
    1
    400
    4.5 V
    120 V
    3.5 V
    -
    onsemi
    NPN
    500 mA
    50 V
    5 V
    SOIC
    Surface Mount
    16
    -
    Common Emitter
    7
    1000
    -
    -
    1.6 V
    -
    onsemi
    PNP
    50 A
    120 V
    5 V
    TO-204
    Through Hole
    2
    -
    Single
    1
    400
    4.5 V
    120 V
    3.5 V
    -
    Texas Instruments
    NPN
    500 mA
    50 V
    50 V
    PDIP
    Through Hole
    16
    -
    Common Emitter
    7
    -
    -
    -
    1.6 V
    -
    STMicroelectronics
    NPN
    500 mA
    50 V
    -
    PDIP
    Through Hole
    16
    -
    Common Emitter
    7
    1000
    -
    -
    1.6 V
    -
    Texas Instruments
    NPN
    500 mA
    50 V
    50 V
    SOIC
    Surface Mount
    18
    -
    Common Emitter
    8
    -
    -
    -
    1.6 V
    -
    onsemi
    NPN
    8 A
    60 V
    5 V
    TO-220
    Through Hole
    3
    -
    Single
    1
    1000
    -
    60 V
    4 V
    0.5mA
    STMicroelectronics
    NPN
    10 A
    100 V
    5 V
    TO-220
    Through Hole
    3
    -
    Single
    1
    500
    -
    100 V
    3 V
    1mA
    Texas Instruments
    NPN
    500 mA
    50 V
    50 V
    PDIP
    Through Hole
    16
    -
    Common Emitter
    7
    -
    -
    -
    1.6 V
    -
    STMicroelectronics
    NPN
    500 mA
    50 V
    -
    PDIP
    Through Hole
    16
    -
    Common Emitter
    7
    1000
    -
    -
    1.6 V
    -
    onsemi
    NPN
    800 mA
    80 V
    12 V
    SOT-23
    Surface Mount
    3
    -
    Single
    1
    10000
    -
    80 V
    1.5 V
    100nA
    STMicroelectronics
    NPN
    8 A
    100 V
    5 V
    TO-220
    Through Hole
    3
    -
    Single
    1
    200
    -
    100 V
    2.5 V
    0.05mA
    onsemi
    NPN
    30 A
    60 V
    5 V
    TO-204AA
    Through Hole
    2
    -
    Single
    2
    200
    5 V
    60 V
    4 V
    -
    STMicroelectronics
    PNP
    12 A
    100 V
    -
    TO-220
    Through Hole
    3
    -
    Single
    1
    100
    4 V
    100 V
    3 V
    0.1mA
    STMicroelectronics
    PNP
    12 A
    100 V
    -
    TO-220
    Through Hole
    3
    -
    Single
    1
    100
    4 V
    100 V
    3 V
    0.1mA
    Texas Instruments
    NPN
    500 mA
    50 V
    50 V
    PDIP
    Through Hole
    16
    -
    Common Emitter
    7
    -
    -
    -
    1.6 V
    -
    STMicroelectronics
    PNP
    8 A
    100 V
    5 V
    TO-220
    Through Hole
    3
    -
    Single
    1
    750
    2.5 V
    100 V
    2 V
    0.2mA
    Texas Instruments
    NPN
    500 mA
    50 V
    50 V
    PDIP
    Through Hole
    16
    -
    Common Emitter
    7
    -
    -
    -
    1.6 V
    -
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