TRIACs | BT136 | BTA12 | RS
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    TRIACs

    A TRIAC (triode for alternating current, also known as bidirectional triode thyristor or a bilateral triode thyristor) is a silicon semiconductor component with three terminals or legs that allow current to flow in either direction when triggered. TRIACs are a subset of thyristors Thyristor guide and are similar to SCRs (silicon controlled rectifiers). However, unlike SCRs and other thyristors, which are unidirectional, the TRIAC is able to control current over both halves of the sine wave, making TRIACs bidirectional. A TRIAC is a 4-layer silicon component that is PNPN in the positive direction and NPNP in the negative direction. The devices come in panel mount, surface mount, and through-hole mounting options in various package types to suit a wide variety of electronics applications and circuits.RS have a curated range of TRIACs from a multitude of trusted brands, including Littelfuse, STMicroelectronics, WeEn Semiconductors Co., and many more.

    How does a TRIAC work?

    In basic terms, a TRIAC is a low-to-medium power semi-latching solid-state switch. The device acts like two standard thyristors inversely connected in parallel or back to back. To activate the component a voltage needs to be applied to the gate terminal, and TRIACs can be triggered by either negative or positive voltages, whereas SCRs require a positive voltage. Once the gate current is triggered, a TRIAC will continue to conduct even if the supply to the gate is removed.

    On a TRIAC symbol, there are three terminals. These terminals are:

    • MT1 Anode 1 (Main Terminal 1)
    • MT2 Anode 2 (Main Terminal 2)
    • Gate Terminal

    What are TRIACs used for?

    TRIACs are widely used for switching and power control of AC systems. TRIACS are particularly useful in applications such as lighting dimmer switches, as they enable the utilisation of each half-cycle of the AC wave. The solid-state device can be used in a circuit as a simple on-off device in a wide range of electronic applications. Some of the more common areas are:

    • Temperature control
    • Liquid level control
    • Dimmers for domestic lighting
    • Small motor control
    • Speed control for electric fans

    720 Producten voor TRIACs

    WeEn Semiconductors Co., Ltd
    25A
    Through Hole
    TO-220AB
    70mA
    600V
    209A
    3
    1.5V
    600V
    60mA
    10.3 x 4.7 x 9.4mm
    10.3mm
    4.7mm
    9.4mm
    WeEn Semiconductors Co., Ltd
    16A
    Surface Mount
    D2PAK (TO-263)
    70mA
    600V
    170A
    3
    1.5V
    600V
    45mA
    10.3 x 9.4 x 4.5mm
    10.3mm
    9.4mm
    4.5mm
    WeEn Semiconductors Co., Ltd
    12A
    Through Hole
    TO-220F
    25mA
    600V
    105A
    3
    1.5V
    600V
    30mA
    10.3 x 4.6 x 9.3mm
    10.3mm
    4.6mm
    9.3mm
    WeEn Semiconductors Co., Ltd
    4A
    Through Hole
    TO-220F
    70mA
    800V
    27A
    3
    1.5V
    800V
    15mA
    10.3 x 4.6 x 9.3mm
    10.3mm
    4.6mm
    9.3mm
    WeEn Semiconductors Co., Ltd
    4A
    Through Hole
    TO-220AB
    10mA
    600V
    27A
    3
    1.5V
    600V
    10mA
    10.3 x 4.7 x 9.4mm
    10.3mm
    4.7mm
    9.4mm
    WeEn Semiconductors Co., Ltd
    8A
    Through Hole
    TO-220AB
    10mA
    600V
    71A
    3
    1.5V
    600V
    10mA
    10.3 x 4.7 x 9.4mm
    10.3mm
    4.7mm
    9.4mm
    WeEn Semiconductors Co., Ltd
    12A
    Through Hole
    TO-220AB
    25mA
    600V
    105A
    3
    1.5V
    600V
    30mA
    10.3 x 4.7 x 9.4mm
    10.3mm
    4.7mm
    9.4mm
    WeEn Semiconductors Co., Ltd
    12A
    Through Hole
    TO-220AB
    70mA
    600V
    105A
    3
    1.5V
    600V
    30mA
    10.3 x 4.7 x 9.4mm
    10.3mm
    4.7mm
    9.4mm
    WeEn Semiconductors Co., Ltd
    20A
    Through Hole
    TO-220AB
    25mA
    800V
    170A
    3
    1V
    800V
    45mA
    10.3 x 4.7 x 16mm
    10.3mm
    4.7mm
    16mm
    STMicroelectronics
    40A
    Panel Mount
    RD-91
    100mA
    600V
    420A
    3
    1.3V
    600V
    80mA
    40 x 27 x 14mm
    40mm
    27mm
    14mm
    STMicroelectronics
    6A
    Through Hole
    TO-220AB
    5mA
    600V
    63A
    3
    1.5V
    600V
    15mA
    10.5 x 4.82 x 9.02mm
    10.5mm
    4.82mm
    9.02mm
    STMicroelectronics
    25A
    Through Hole
    TOP3
    100mA
    800V
    260A
    3
    1.3V
    800V
    80mA
    15.5 x 4.6 x 21.1mm
    15.5mm
    4.6mm
    21.1mm
    WeEn Semiconductors Co., Ltd
    1A
    Surface Mount
    SOT-223 (SC-73)
    5mA
    600V
    8.5A
    4
    1.3V
    600V
    7mA
    6.7 x 3.7 x 1.7mm
    6.7mm
    3.7mm
    1.7mm
    STMicroelectronics
    26A
    Through Hole
    TO-3PF
    50mA
    600V
    -
    3
    1.3V
    -
    -
    -
    -
    -
    -
    STMicroelectronics
    25A
    Through Hole
    TOP3
    50mA
    800V
    250A
    3
    1.3V
    800V
    75mA
    15.5 x 4.6 x 21.1mm
    15.5mm
    4.6mm
    21.1mm
    STMicroelectronics
    25A
    Panel Mount
    RD-91
    100mA
    800V
    260A
    3
    1.3V
    600V
    80mA
    40 x 27 x 14mm
    40mm
    27mm
    14mm
    STMicroelectronics
    26A
    Through Hole
    TO-3PF
    50mA
    600V
    -
    3
    1.3V
    -
    -
    -
    -
    -
    -
    STMicroelectronics
    10A
    Through Hole
    TO-220AB
    50mA
    600V
    105A
    3
    1.3V
    600V
    50mA
    10.4 x 4.6 x 9.15mm
    10.4mm
    4.6mm
    9.15mm
    IXYS
    30A
    Through Hole
    TO-247
    ±80mA
    1200V
    410A
    3
    1.9V
    1200V
    60mA
    16.24 x 5.3 x 21.45mm
    16.24mm
    5.3mm
    21.45mm
    STMicroelectronics
    16A
    Through Hole
    TO-220AB
    50mA
    600V
    168A
    3
    1.3V
    600V
    50mA
    10.4 x 4.6 x 9.3mm
    10.4mm
    4.6mm
    9.3mm
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