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

...
Read more Read less

Filters

Viewing 1 - 20 of 626 products
Results per page
Description 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. 486-0907
Mfr. Part No.BTA16-600BWRG
kr 14,716
Each (In a Pack of 5)
Units
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
RS Stock No. 102-3526
Mfr. Part No.BTA16-600BWRG
kr 12,466
Each (In a Tube of 50)
Units
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
RS Stock No. 509-415
Mfr. Part No.BT138X-600,127
kr 8,076
Each (In a Pack of 5)
Units
12A Through Hole TO-220F 70mA 600V 105A 3 1.5V 600V 30mA 10.3 x 4.6 x 9.3mm 10.3mm 4.6mm 9.3mm
RS Stock No. 146-0400
Mfr. Part No.BTA208X-600E
kr 7,832
Each (On a Reel of 50)
Units
8A Through Hole TO-220F 10mA 600V 71A 3 1.5V 600V 12mA 10.3 x 4.6 x 15.8mm 10.3mm 4.6mm 15.8 (With Tab)mm
RS Stock No. 792-0730
Mfr. Part No.BTA208X-600E
kr 8,614
Each (In a Pack of 10)
Units
8A Through Hole TO-220F 10mA 600V 71A 3 1.5V 600V 12mA 10.3 x 4.6 x 15.8mm 10.3mm 4.6mm 15.8 (With Tab)mm
RS Stock No. 484-2814
Mfr. Part No.BT139-800
kr 8,076
Each (In a Pack of 5)
Units
16A Through Hole TO-220AB 70mA 800V 170A 3 1.5V 800V 45mA 10.3 x 4.7 x 9.4mm 10.3mm 4.7mm 9.4mm
RS Stock No. 800-9727
Mfr. Part No.BTA12-800BW3G
BrandLittelfuse
kr 10,62
Each (In a Pack of 10)
Units
12A Through Hole TO-220 50mA 800V 105A 3 1.7V 800V 50mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS Stock No. 484-2735
Mfr. Part No.BT136-600,127
kr 5,344
Each (In a Pack of 5)
Units
25A Through Hole TO-220AB 70mA 600V 27A 3 1.5V 600V 15mA 10.3 x 4.7 x 9.4mm 10.3mm 4.7mm 9.4mm
RS Stock No. 168-9624
Mfr. Part No.BT136-600,127
kr 4,413
Each (In a Tube of 50)
Units
25A Through Hole TO-220AB 70mA 600V 27A 3 1.5V 600V 15mA 10.3 x 4.7 x 9.4mm 10.3mm 4.7mm 9.4mm
RS Stock No. 687-0909
Mfr. Part No.T2535-600G-TR
kr 24,625
Each (In a Pack of 2)
Units
25A Surface Mount D2PAK (TO-263) 35mA 600V 260A 3 1.3V 600V 50mA 10.28 x 9.35 x 4.6mm 10.28mm 9.35mm 4.6mm
RS Stock No. 484-2820
Mfr. Part No.BT139X-800,127
kr 8,156
Each (In a Pack of 5)
Units
16A Through Hole TO-220F 70mA 800V 170A 3 1.5V 800V 45mA 10.3 x 4.6 x 9.3mm 10.3mm 4.6mm 9.3mm
RS Stock No. 165-7489
Mfr. Part No.T2535-600G-TR
kr 13,069
Each (On a Reel of 1000)
Units
25A Surface Mount D2PAK (TO-263) 35mA 600V 260A 3 1.3V 600V 80mA 10.28 x 9.35 x 4.6mm 10.28mm 9.35mm 4.6mm
RS Stock No. 714-2675
Mfr. Part No.Z0410MF 1AA2
kr 6,839
Each (In a Pack of 10)
Units
4A Through Hole TO-202 25mA 600V 21A 3 1.3V 600V 25mA 10.1 x 4.5 x 7.3mm 10.1mm 4.5mm 7.3mm
RS Stock No. 165-7646
Mfr. Part No.Z0410MF 1AA2
kr 4,944
Each (In a Bag of 250)
Units
4A Through Hole TO-202 25mA 600V 21A 3 1.3V 600V 25mA 10.1 x 4.5 x 7.3mm 10.1mm 4.5mm 7.3mm
RS Stock No. 544-9961
Mfr. Part No.2N6075AG
BrandLittelfuse
kr 7,78
Each
Units
4A Through Hole TO-225 10mA 600V 30A 3 2.5V 600V 15mA 7.74 x 2.66 x 11.04mm 7.74mm 2.66mm 11.04mm
RS Stock No. 714-2625
Mfr. Part No.BTB10-600BWRG
kr 10,728
Each (In a Pack of 5)
Units
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
RS Stock No. 178-1386
Mfr. Part No.BTA25-600B
kr 47,302
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. 168-8900
Mfr. Part No.T2535-600G
kr 7,465
Each (In a Tube of 50)
Units
25A Surface Mount D2PAK (TO-263) 35mA 600V 260A 3 1.3V 600V 80mA 10.28 x 9.35 x 4.6mm 10.28mm 9.35mm 4.6mm
RS Stock No. 877-3028
Mfr. Part No.T2535-600G
kr 8,052
Each (In a Pack of 5)
Units
25A Surface Mount D2PAK (TO-263) 35mA 600V 260A 3 1.3V 600V 80mA 10.28 x 9.35 x 4.6mm 10.28mm 9.35mm 4.6mm
RS Stock No. 124-9963
Mfr. Part No.BTA12-600CW3G
BrandLittelfuse
kr 14,458
Each (In a Tube of 50)
Units
12A Through Hole TO-220 35mA 600V 105A 3 1.7V 800V 45mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
Related Products
Excellent uni-directional switches for phase control applications such ...
Description:
Excellent uni-directional switches for phase control applications such as heating and motor speed controls. Sensitive gate SCRs are easily triggered with microamperes of current. Standard phase control SCRs are triggered with few milliamperes of current at less than 1.5V potential. ...
Excellent uni-directional switches for phase control applications such ...
Description:
Excellent uni-directional switches for phase control applications such as heating and motor speed controls. Sensitive gate SCRs are easily triggered with microamperes of current. Standard phase control SCRs are triggered with few milliamperes of current at less than 1.5V potential. ...
Excellent uni-directional switches for phase control applications such ...
Description:
Excellent uni-directional switches for phase control applications such as heating and motor speed controls. Sensitive gate SCRs are easily triggered with microamperes of current. Standard phase control SCRs are triggered with few milliamperes of current at less than 1.5V potential. ...
A range of TRIACs (Triodes for Alternating Current ...
Description:
A range of TRIACs (Triodes for Alternating Current is also known as Bidirectional Thyristors). They are used in AC switching and control applications with current ratings from under 1A to 40A rms. A TRIAC makes a convenient switch for alternating ...