TRIACs

A TRIAC (triode for alternating current) is a silicone semiconductor component with three terminals or legs that allow current to flow in either direction when triggered. TRIACs are a development of a similar family member the thyristor. However, unlike the thyristor which is unidirectional the TRIAC is able to control current over both halves of the sine wave making TRIACs bidirectional.
How does it work?
In basic terms a TRIAC is a low power 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. Once the gate current is triggered a TRIAC will continue to conduct even if the supply to the gate is removed.
A TRIAC is a 4 layer silicone 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 electronics applications and circuits.
Terminals
On the TRIAC symbol there are three terminals. These terminals are,
MT1 Anode 1 (Main Terminal 1)
MT2 Anode 2 (Main Terminal 2)
Gate Terminal
Applications
TRIACs are widely used for switching and power control of AC systems. TRIACS are particularly useful in applications such as lighting dimmers 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
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Part Details Brand Stock Rated Average On-State Current Mounting Type Package Type Maximum Gate Trigger Current Repetitive Peak Reverse Voltage Surge Current Rating Pin Count Maximum Gate Trigger Voltage Repetitive Peak Forward Blocking Voltage Maximum Holding Current Dimensions Length Width Height Repetitive Peak Off-State Current Peak On-State Voltage Minimum Operating Temperature Maximum Operating Temperature
BTA20-700BWRG 20A, TRIAC, 3-pin, Through Hole, TO-220AB STMicroelectronics
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BTA24-800CWRG 25A, TRIAC 50mA, 3-pin, Through Hole, TO-220AB STMicroelectronics
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BTA24-800CWRG 25A, TRIAC 50mA, 3-pin, Through Hole, TO-220AB STMicroelectronics
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BTA41-700BRG 41A, TRIAC 50mA, 3-pin, Through Hole, TOP STMicroelectronics
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BTB41-800BRG 41A, TRIAC 50mA, 3-pin, Through Hole, TOP STMicroelectronics
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T1635H-6G-TR 16A, TRIAC, 3-pin, Surface Mount, D2PAK STMicroelectronics
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T2550-12I 25A, TRIAC 50mA, 3-pin, Through Hole, TO-220AB STMicroelectronics
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60mA Please note that the Stock level on this page is periodically updated during the day.

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T3050H-6T 30A, TRIAC, 3-pin, Through Hole, TO-220AB STMicroelectronics
  • $ 2.566
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3 Please note that the Stock level on this page is periodically updated during the day.

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75mA Please note that the Stock level on this page is periodically updated during the day.

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10.4mm Please note that the Stock level on this page is periodically updated during the day.

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4.6mm Please note that the Stock level on this page is periodically updated during the day.

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STMicroelectronics Please note that the Stock level on this page is periodically updated during the day.

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TO-220AB Please note that the Stock level on this page is periodically updated during the day.

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- - 284A Please note that the Stock level on this page is periodically updated during the day.

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3 Please note that the Stock level on this page is periodically updated during the day.

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- 600V Please note that the Stock level on this page is periodically updated during the day.

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75mA Please note that the Stock level on this page is periodically updated during the day.

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10.4 x 4.6 x 15.9mm Please note that the Stock level on this page is periodically updated during the day.

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10.4mm Please note that the Stock level on this page is periodically updated during the day.

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4.6mm Please note that the Stock level on this page is periodically updated during the day.

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15.9mm Please note that the Stock level on this page is periodically updated during the day.

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- - -40 °C Please note that the Stock level on this page is periodically updated during the day.

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Z0103NN5AA4 1A, TRIAC 25mA, 4-pin, Surface Mount, SOT-223 STMicroelectronics
  • $ 0.227
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STMicroelectronics Please note that the Stock level on this page is periodically updated during the day.

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25mA Please note that the Stock level on this page is periodically updated during the day.

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4 Please note that the Stock level on this page is periodically updated during the day.

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- 800V Please note that the Stock level on this page is periodically updated during the day.

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7mA Please note that the Stock level on this page is periodically updated during the day.

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6.7 x 3.7 x 1.8mm Please note that the Stock level on this page is periodically updated during the day.

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6.7mm Please note that the Stock level on this page is periodically updated during the day.

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3.7mm Please note that the Stock level on this page is periodically updated during the day.

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1.8mm Please note that the Stock level on this page is periodically updated during the day.

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- - -40 °C Please note that the Stock level on this page is periodically updated during the day.

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+125 °C Please note that the Stock level on this page is periodically updated during the day.

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STMicroelectronics Please note that the Stock level on this page is periodically updated during the day.

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25mA Please note that the Stock level on this page is periodically updated during the day.

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4 Please note that the Stock level on this page is periodically updated during the day.

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7mA Please note that the Stock level on this page is periodically updated during the day.

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6.7mm Please note that the Stock level on this page is periodically updated during the day.

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3.7mm Please note that the Stock level on this page is periodically updated during the day.

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1.8mm Please note that the Stock level on this page is periodically updated during the day.

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- - -40 °C Please note that the Stock level on this page is periodically updated during the day.

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Z0107NN 5AA4 1A, TRIAC 25mA, 4-pin, Surface Mount, SOT-223 STMicroelectronics
  • $ 0.321
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25mA Please note that the Stock level on this page is periodically updated during the day.

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4 Please note that the Stock level on this page is periodically updated during the day.

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10mA Please note that the Stock level on this page is periodically updated during the day.

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6.7 x 3.7 x 1.8mm Please note that the Stock level on this page is periodically updated during the day.

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6.7mm Please note that the Stock level on this page is periodically updated during the day.

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3.7mm Please note that the Stock level on this page is periodically updated during the day.

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1.8mm Please note that the Stock level on this page is periodically updated during the day.

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- - -40 °C Please note that the Stock level on this page is periodically updated during the day.

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Z0107NN 5AA4 1A, TRIAC 25mA, 4-pin, Surface Mount, SOT-223 STMicroelectronics
  • $ 0.628
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25mA Please note that the Stock level on this page is periodically updated during the day.

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4 Please note that the Stock level on this page is periodically updated during the day.

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10mA Please note that the Stock level on this page is periodically updated during the day.

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6.7mm Please note that the Stock level on this page is periodically updated during the day.

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3.7mm Please note that the Stock level on this page is periodically updated during the day.

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1.8mm Please note that the Stock level on this page is periodically updated during the day.

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- - -40 °C Please note that the Stock level on this page is periodically updated during the day.

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VOM3052T, 6V, TRIAC 10mA, 4-pin, Surface Mount, SOP Vishay
  • $ 0.432
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0.5A Please note that the Stock level on this page is periodically updated during the day.

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4.57 x 4.42 x 1.97mm Please note that the Stock level on this page is periodically updated during the day.

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4.57mm Please note that the Stock level on this page is periodically updated during the day.

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4.42mm Please note that the Stock level on this page is periodically updated during the day.

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1.97mm Please note that the Stock level on this page is periodically updated during the day.

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100nA Please note that the Stock level on this page is periodically updated during the day.

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-40 °C Please note that the Stock level on this page is periodically updated during the day.

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VO3062, 6V, TRIAC, Gate Trigger 22V 10mA, 6-pin, Through Hole, DIP Vishay
  • $ 0.962
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1990 Please note that the Stock level on this page is periodically updated during the day.

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1 (Non-Reptitive)A Please note that the Stock level on this page is periodically updated during the day.

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6 Please note that the Stock level on this page is periodically updated during the day.

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600V Please note that the Stock level on this page is periodically updated during the day.

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- 9 x 6.4 x 3.5mm Please note that the Stock level on this page is periodically updated during the day.

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9mm Please note that the Stock level on this page is periodically updated during the day.

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6.4mm Please note that the Stock level on this page is periodically updated during the day.

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500nA Please note that the Stock level on this page is periodically updated during the day.

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-55 °C Please note that the Stock level on this page is periodically updated during the day.

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