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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Omschrijving Prijs 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-stocknr. 165-9917
FabrikantnummerQ6030LH5
FabrikantLittelfuse
2,03 €
Each (On a Reel of 500)
Aantal stuks
30A Through Hole TO-220AB 50mA 600V 350A 3 2.75V 600V 75mA 10.67 x 4.78 x 15.75mm 10.67mm 4.78mm 15.75mm
RS-stocknr. 793-1901
FabrikantnummerQ6030LH5
FabrikantLittelfuse
3,438 €
Each (In a Pack of 5)
Aantal stuks
30A Through Hole TO-220AB 50mA 600V 350A 3 2.75V 600V 75mA 10.67 x 4.78 x 15.75mm 10.67mm 4.78mm 15.75mm
RS-stocknr. 806-2374
FabrikantnummerMAC16CNG
FabrikantLittelfuse
1,049 €
Each (In a Pack of 10)
Aantal stuks
16A Through Hole TO-220AB 35mA 800V 150A 3 1.5V 800V 50mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS-stocknr. 862-4897
Fabrikantnummer2N6344G
FabrikantLittelfuse
1,08 €
Each (In a Pack of 10)
Aantal stuks
8A Through Hole TO-220AB 125mA 600V 100A 3 3V 600V 75mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS-stocknr. 177-5188
FabrikantnummerMAC16CNG
FabrikantLittelfuse
1,049 €
Each (In a Tube of 50)
Aantal stuks
16A Through Hole TO-220AB 35mA 800V 150A 3 1.5V 800V 50mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS-stocknr. 177-5208
Fabrikantnummer2N6344G
FabrikantLittelfuse
0,752 €
Each (In a Box of 500)
Aantal stuks
8A Through Hole TO-220AB 125mA 600V 100A 3 3V 600V 75mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS-stocknr. 165-9897
FabrikantnummerQ6040J7TP
FabrikantLittelfuse
6,578 €
Each (In a Tube of 25)
Aantal stuks
40A Through Hole TO-218X 100mA 600V 400A 3 2V 600V 120mA 16 x 4.78 x 21.21mm 16mm 4.78mm 21.21mm
RS-stocknr. 793-1904
FabrikantnummerQ6040J7TP
FabrikantLittelfuse
8,00 €
Each
Aantal stuks
40A Through Hole TO-218X 100mA 600V 400A 3 2V 600V 120mA 16 x 4.78 x 21.21mm 16mm 4.78mm 21.21mm
RS-stocknr. 165-9794
FabrikantnummerL4008D6RP
FabrikantLittelfuse
0,563 €
Each (On a Reel of 2500)
Aantal stuks
8A Surface Mount DPAK (TO-252) 5 mA, 10 mA 400V 100A 3 1.3V 400V 10mA 6.73 x 7.49 x 2.41mm 6.73mm 7.49mm 2.41mm
Nieuw
RS-stocknr. 213-0883
FabrikantnummerQV6016NH4RP
FabrikantLittelfuse
1,827 €
Each (On a Reel of 500)
Aantal stuks
200A Surface Mount TO-263 35mA 600V - 3 1.3V - - - - - -
RS-stocknr. 806-2387
FabrikantnummerMAC16HCMG
FabrikantLittelfuse
0,838 €
Each (In a Pack of 10)
Aantal stuks
16A Through Hole TO-220AB 50mA 600V 150A 3 1.5V 600V 50mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
Nieuw
RS-stocknr. 213-0884
FabrikantnummerQV6016NH4RP
FabrikantLittelfuse
2,874 €
Each (In a Pack of 5)
Aantal stuks
200A Surface Mount TO-263 35mA 600V - 3 1.3V - - - - - -
RS-stocknr. 171-0127
FabrikantnummerMAC08BT1G
FabrikantLittelfuse
0,136 €
Each (On a Reel of 1000)
Aantal stuks
0.8A Surface Mount SOT-223 10mA 200V 8A 3+Tab 2V 600V 5mA 6.7 x 3.7 x 1.65mm 6.7mm 3.7mm 1.65mm
RS-stocknr. 171-9497
FabrikantnummerQ6015L5TP
FabrikantLittelfuse
1,431 €
Each (In a Tube of 500)
Aantal stuks
15A Through Hole TO-220AB 50mA 600V 200A 3 2V - 70mA 10.67 x 4.78 x 15.75mm 10.67mm 4.78mm 15.75mm
Nieuw
RS-stocknr. 213-0885
FabrikantnummerQV6016NH4TP
FabrikantLittelfuse
1,772 €
Each (In a Tube of 1000)
Aantal stuks
200A Surface Mount TO-263 35mA 600V - 3 1.3V - - - - - -
RS-stocknr. 806-2393
FabrikantnummerMAC228A8TG
FabrikantLittelfuse
0,925 €
Each (In a Pack of 10)
Aantal stuks
8A Through Hole TO-220AB 10mA 600V 80A 3 2.5V 600V 15mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS-stocknr. 774-3495
FabrikantnummerMAC12MG
FabrikantLittelfuse
0,892 €
Each (In a Pack of 5)
Aantal stuks
12A Through Hole TO-220AB 35mA 600V 100A 3 1.5V 600V 40mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS-stocknr. 177-5204
FabrikantnummerMAC228A10G
FabrikantLittelfuse
0,813 €
Each (In a Box of 500)
Aantal stuks
8A Through Hole TO-220AB 10mA 800V 80A 3 2.5V 800V 15mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS-stocknr. 177-5221
FabrikantnummerMAC4DCNT4G
FabrikantLittelfuse
0,801 €
Each (On a Reel of 2500)
Aantal stuks
4A Surface Mount DPAK (TO-252) 35mA 800V 40A 3 1.3V 800V 35mA 6.73 x 6.22 x 2.38mm 6.73mm 6.22mm 2.38mm
RS-stocknr. 878-1766
FabrikantnummerL601E3
FabrikantLittelfuse
0,424 €
Each (In a Pack of 2000)
Aantal stuks
1A Through Hole TO-92 3mA 600V 20A 3 1.3V - 5mA 4.73 x 3.68 x 4.98mm 4.73mm 3.68mm 4.98mm