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

    3767 Products showing for Optocouplers

    Toshiba
    -
    Surface Mount
    Phototransistor
    1.4V
    1
    4
    SO
    DC
    2µs
    50 mA
    3750 Vrms
    600%
    100%
    3µs
    -
    TLP291
    Vishay
    -
    Surface Mount
    Transistor
    1.25V
    1
    4
    SMD
    DC
    3µs
    60 mA
    5300 Vrms
    125%
    63%
    14µs
    -
    SFH
    Toshiba
    -
    Surface Mount
    MOSFET
    1.4V
    -
    4
    -
    -
    -
    -
    -
    -
    -
    -
    -
    TLP
    Broadcom
    -
    Surface Mount
    CMOS
    1.5V
    1
    6
    SO
    DC
    -
    -
    -
    -
    -
    -
    -
    ACPL
    Isocom
    -
    Through Hole
    NPN Phototransistor
    1.3V
    4
    16
    DIP
    DC
    4µs
    50 mA
    5300 Vrms
    600%
    100%
    3µs
    -
    TLP521
    onsemi
    -
    Through Hole
    Transistor
    1.5V
    1
    6
    PDIP
    DC
    -
    60 mA
    7.5 kVrms
    -
    100%
    -
    -
    4N35
    Panasonic
    -
    Through Hole
    MOSFET
    -
    -
    4
    DIP
    DC
    -
    50 mA
    5 kVrms
    -
    -
    -
    -
    AQY
    Isocom
    -
    Through Hole
    Transistor
    1.65V
    2
    8
    PDIP
    DC
    -
    50 mA
    5.3 kVrms
    450%
    225%
    -
    -
    ISD
    Vishay
    -
    Through Hole
    Transistor
    1.5V
    1
    6
    PDIP
    DC
    -
    50 mA
    5 kVrms
    50%
    40%
    -
    -
    4N35
    Isocom
    Logic Output
    Through Hole
    -
    1.7V
    1
    8
    DIP
    DC
    -
    1 A
    5000 Vrms
    -
    300%
    -
    -
    6N138
    Infineon
    -
    Surface Mount
    MOSFET
    8V
    2
    8
    DIP
    DC
    300µs
    50 mA dc
    2500 Vrms
    -
    -
    220µs
    -
    PVI
    onsemi
    -
    Through Hole
    Transistor
    1.65V
    1
    6
    PDIP
    DC
    -
    60 mA
    7.5 kVrms
    200%
    100%
    -
    -
    CNY
    Broadcom
    -
    Surface Mount
    Transistor
    1.4V
    2
    8
    SOIC
    DC
    2µs
    50 mA
    3 kVrms
    600%
    50%
    3µs
    -
    ACPL
    Broadcom
    -
    -
    MOSFET
    1.8V
    -
    -
    DIP
    -
    -
    16 mA
    3750 Vrms
    -
    -
    -
    -
    HCPL
    Broadcom
    Logic Output
    Surface Mount
    Transistor
    1.8V
    2
    8
    SO
    -
    24ns
    15 mA
    3750 Vrms
    -
    -
    10ns
    -
    HCPL
    Broadcom
    Logic Output
    Surface Mount
    Transistor
    1.75V
    1
    8
    SOIC
    DC
    0.024µs
    150 mA
    3.75 kVrms
    -
    -
    0.01µs
    -
    HCPL
    onsemi
    Logic Output
    Surface Mount
    -
    1.5V
    1
    6
    SMT
    -
    -
    60 mA
    4170 Vrms ac
    -
    -
    -
    -
    MOC
    Cosmo
    -
    Surface Mount
    Transistor
    1.4V
    -
    4
    DIP
    -
    5µs
    50 mA
    3.75 kVrms
    260%
    130%
    4µs
    -
    KPC357NT-0B
    Vishay
    Logic Output
    Surface Mount
    Phototransistor
    1.8V
    1
    5
    SOP
    DC
    5ns
    25 mA
    3.75 kVrms
    50%
    -
    -
    -
    VOM
    onsemi
    -
    Through Hole
    Triac
    -
    1
    6
    PDIP
    -
    -
    60 mA
    7.5 kVrms
    -
    -
    -
    -
    MOC
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