Optocouplers, Arduino Optocoupler Circuits | RS
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    Optocouplers

    An optocoupler IC, also known as an opto-isolator or photocoupler, is a semiconductor device which is used to couple isolated circuits. Within an optocoupler you will find a light emitter and a light sensor. Optocouplers usually come in a semiconductor package, such as SOIC or PDIP.

    How does an optocoupler IC work?

    Optocouplers work by transferring energy from one circuit to another circuit via an optical transmission path, while providing electrical isolation

    The light emitter device can come in the form of an LED (light emitting diode) that produces IR or visible light, or a laser diode. The light emitter receives the input and converts it into a light signal. The light detector senses the light emitter and converts it back into an electrical signal.

    Optocouplers are often used in high-voltage applications to block the high voltages and variations in voltage. This ensures that, if there is a spike in one part of a circuit, it will not affect other parts. Therefore they are ideal for applications which may experience variations in voltage.

    Types of Optocoupler:

    • Resistive

    • Photodiode

    • Phototransistor

    • Bidirectional

    Output Types

    • CMOS

    • Darlington

    • IGBT Gate Drive

    • Logic Gate

    • MOSFET

    • Photodarlington

    • Phototransistor

    • Single Transistor

    • TRIAC

    3631 Products showing for Optocouplers

    Broadcom
    -
    Surface Mount
    IGBT Gate Drive
    1.5V
    1
    6
    SO
    DC
    -
    -
    -
    -
    -
    -
    -
    ACPL
    Lite-On
    -
    Surface Mount
    Transistor
    1.4V
    1
    4
    Mini-Flat
    AC
    4µs
    50 mA
    5 kVrms
    400%
    20%
    3µs
    -
    LTV
    Toshiba
    -
    Through Hole
    MOSFET
    1.48V
    2
    5
    PDIP
    DC
    -
    30 mA
    2.5 kVrms
    -
    -
    -
    -
    TLP
    Isocom
    -
    Through Hole
    Darlington
    1.5V
    1
    6
    DIP
    DC
    100µs
    50 mA
    5.3 kVrms
    -
    1000%
    20µs
    -
    H11G
    Toshiba
    -
    Surface Mount
    Transistor
    1.4V
    1
    4
    SO
    -
    -
    -
    -
    -
    -
    -
    -
    TLP
    Broadcom
    Logic Output
    Through Hole
    Transistor
    1.75V
    2
    8
    DIP
    DC
    24ns
    20 mA
    3750 V ac
    -
    -
    10ns
    -
    HCPL
    Broadcom
    Logic Output
    Surface Mount
    Transistor
    1.75V
    2
    8
    SOIC
    DC
    24ns
    15 mA
    3.75 kVrms
    -
    -
    10ns
    -
    HCPL
    Broadcom
    Logic Output
    Through Hole
    Darlington
    1.7V
    2
    8
    PDIP
    DC
    -
    20 mA
    5 kVrms
    5000%
    400%
    -
    -
    HCPL
    onsemi
    -
    Through Hole
    Triac
    1.5V
    1
    6
    DIP
    DC
    -
    60 mA
    7500 V ac
    -
    -
    -
    -
    MOC
    Broadcom
    -
    Surface Mount
    Logic Gate
    1.52V
    4
    16
    SO
    DC
    -
    -
    -
    -
    -
    -
    -
    ACSL
    Isocom
    -
    Through Hole
    Transistor
    1.5V
    1
    6
    PDIP
    DC
    2µs
    60 mA
    5.3 kVrms
    -
    40%
    2µs
    -
    4N25
    Broadcom
    -
    Surface Mount
    Logic Gate
    1.52V
    4
    16
    SO
    DC
    -
    -
    -
    -
    -
    -
    -
    ACSL
    Isocom
    -
    Through Hole
    Darlington
    1.4V
    1
    4
    PDIP
    DC
    60µs
    50 mA
    5.3 kVrms
    7500%
    600%
    53µs
    -
    ISP
    Broadcom
    Logic Output
    Through Hole
    Transistor
    0.2V
    -
    8
    DIP
    DC
    -
    15 mA
    3.75 kVrms
    -
    -
    -
    -
    HCPL
    Lite-On
    -
    Through Hole
    Triac
    1.4V
    1
    6
    PDIP
    -
    -
    50 mA
    5 kVrms
    -
    -
    -
    -
    MOC
    Vishay
    -
    Surface Mount
    NMOS
    1.7V
    1
    8
    DIP
    AC/DC
    -
    -
    -
    -
    -
    -
    -
    6N137
    Lite-On
    -
    Through Hole
    Triac
    -
    1
    6
    PDIP
    -
    -
    50 mA
    5 kVrms
    -
    -
    -
    -
    MOC
    Broadcom
    Logic Output
    Surface Mount
    Transistor
    1.8V
    1
    8
    DIP
    DC
    0.1µs
    16 mA
    3.75 kVrms
    -
    -
    0.1µs
    -
    HCPL
    Vishay
    -
    Surface Mount
    Phototransistor
    1.5V
    -
    4
    SMD
    -
    -
    -
    -
    -
    -
    -
    -
    SFH
    Vishay
    Logic Output
    Surface Mount
    -
    1.7V
    1
    8
    PDIP
    DC
    0.023µs
    -
    5300 V ac
    -
    -
    0.007µs
    -
    VO
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