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 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 Components 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

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รายละเอียดสินค้า / Description ราคา / Price 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
RS Stock No. 178-1386
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BTA25-600B
THB196.088
Each (In a Bag of 25)
Units
25A Panel Mount RD-91 100mA 800V 260A 3 1.3V 600V 80mA 40 x 27 x 14mm 40mm 27mm 14mm
RS Stock No. 829-4014
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BTA25-600B
THB229.67
Each: (In a Pack of 2)
Units
25A Panel Mount RD-91 100mA 800V 260A 3 1.3V 600V 80mA 40 x 27 x 14mm 40mm 27mm 14mm
RS Stock No. 168-6659
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TPDV1240RG
THB317.51
Each (In a Tube of 30)
Units
40A Through Hole TOP3 200mA 1200V 590A 3 1.5V 1200V - 15.5 x 4.6 x 12.85mm 15.5mm 4.6mm 12.85mm
RS Stock No. 687-0987
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TPDV1240RG
THB368.64
Each
Units
40A Through Hole TOP3 200mA 1200V 590A 3 1.5V 1200V - 15.5 x 4.6 x 12.85mm 15.5mm 4.6mm 12.85mm
RS Stock No. 168-6676
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.T435-800T
THB30.366
Each (In a Tube of 50)
Units
4A Through Hole TO-220AB 35mA 800V 31A 3 1.3V 800V 35mA 10.4 x 4.6 x 9.15mm 10.4mm 4.6mm 9.15mm
RS Stock No. 102-3531
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BTA40-600B
THB222.758
Each (In a Bag of 25)
Units
40A Panel Mount RD-91 100mA 600V 420A 3 1.3V 600V 80mA 40 x 27 x 14mm 40mm 27mm 14mm
RS Stock No. 687-1066
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.T435-800T
THB35.764
Each: (In a Pack of 5)
Units
4A Through Hole TO-220AB 35mA 800V 31A 3 1.3V 800V 35mA 10.4 x 4.6 x 9.15mm 10.4mm 4.6mm 9.15mm
RS Stock No. 127-0654
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BTA40-600B
THB258.84
Each
Units
40A Panel Mount RD-91 100mA 600V 420A 3 1.3V 600V 80mA 40 x 27 x 14mm 40mm 27mm 14mm
RS Stock No. 687-1081
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ACS108-6SN-TR
THB33.884
Each: (In a Pack of 10)
Units
- Surface Mount SOT-223 - - - 3+Tab - - - 6.7 x 3.7 x 1.7mm 6.7mm 3.7mm 1.7mm
RS Stock No. 178-5060
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ACS108-6SN-TR
THB16.758
Each (On a Reel of 1000)
Units
- Surface Mount SOT-223 - - - 3+Tab - - - 6.7 x 3.7 x 1.7mm 6.7mm 3.7mm 1.7mm
RS Stock No. 829-0481
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BTB24-600BRG
THB59.632
Each: (In a Pack of 5)
Units
25A Through Hole TO-220AB 100mA 800V 260A 3 1.3V 600V 80mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS Stock No. 145-9251
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BTB24-600BRG
THB65.258
Each (In a Tube of 50)
Units
25A Through Hole TO-220AB 100mA 800V 260A 3 1.3V 600V 80mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS Stock No. 110-6594
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BTA25-800BW
THB225.58
Each
Units
25A Through Hole RD-91 50mA 800V 260A 3 1.3V 600V 75mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS Stock No. 168-6660
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TPDV1225RG
THB278.912
Each (In a Tube of 30)
Units
25A Through Hole TOP3 150mA 1200V 390A 3 1.5V 1200V - 15.5 x 4.6 x 12.85mm 15.5mm 4.6mm 12.85mm
RS Stock No. 687-0997
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TPDV840RG
THB292.62
Each
Units
40A Through Hole TOP3 200mA 800V 590A 3 1.5V 800V - 15.5 x 4.6 x 12.85mm 15.5mm 4.6mm 12.85mm
RS Stock No. 168-6661
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TPDV840RG
THB292.314
Each (In a Tube of 30)
Units
40A Through Hole TOP3 200mA 800V 590A 3 1.5V 800V - 15.5 x 4.6 x 12.85mm 15.5mm 4.6mm 12.85mm
RS Stock No. 714-2603
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BTA40-800B
THB300.51
Each
Units
40A Panel Mount RD-91 100mA 800V 420A 3 1.3V 800V 80mA 40 x 27 x 14mm 40mm 27mm 14mm
RS Stock No. 178-1385
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BTA25-800BW
THB194.208
Each (In a Bag of 25)
Units
25A Through Hole RD-91 50mA 800V 260A 3 1.3V 600V 75mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS Stock No. 102-3532
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BTA40-700B
THB248.907
Each (In a Bag of 25)
Units
40A Panel Mount RD-91 100mA 700V 315A 3 1.5V 700V 80mA 40 x 27 x 14mm 40mm 27mm 14mm
RS Stock No. 168-6837
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BTA06-600CRG
THB37.958
Each (In a Tube of 50)
Units
6A Through Hole TO-220AB 25mA 800V 63A 3 1.3V 800V 25mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm