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 41 - 60 of 587 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. 484-2729
Mfr. Part No.BT134W-600
$0.734
Each (In a Pack of 10)
units
1A Surface Mount SOT-223 (SC-73) 70mA 600V 11A 4 1.5V 600V 15mA 6.7 x 3.7 x 1.7mm 6.7mm 3.7mm 1.7mm
RS Stock No. 714-2596
Mfr. Part No.BTA16-800CWRG
$2.404
Each (In a Pack of 5)
units
16A Through Hole TO-220AB 35mA 800V 168A 3 1.3V 800V 35mA 10.4 x 4.6 x 9.3mm 10.4mm 4.6mm 9.3mm
RS Stock No. 168-6844
Mfr. Part No.BTB24-800BWRG
$3.176
Each (In a Tube of 50)
units
25A Through Hole TO-220AB 50mA 800V 260A 3 1.3V 800V 75mA 10.4 x 4.6 x 9.15mm 10.4mm 4.6mm 9.15mm
RS Stock No. 178-1478
Mfr. Part No.BT138-800
$1.265
Each (In a Tube of 50)
units
- - - - - - - - - - - - - -
RS Stock No. 687-0915
Mfr. Part No.T1235-600G-TR
$2.35
Each (In a Pack of 2)
units
12A Surface Mount D2PAK (TO-263) 35mA 600V 126A 3 1.3V 600V 35mA 10.28 x 9.35 x 4.6mm 10.28mm 9.35mm 4.6mm
RS Stock No. 168-7905
Mfr. Part No.T1235-600G
$2.033
Each (In a Tube of 50)
units
12A Surface Mount D2PAK (TO-263) 35mA 600V 3.9mA 3 1V - 35mA 10.28 x 9.35 x 4.6mm 10.28mm 9.35mm 4.6mm
RS Stock No. 146-0359
Mfr. Part No.BT134-600D,127
$0.471
Each (In a Tube of 50)
units
4A Through Hole SIP 10mA 600V 27A 3 1.5V 600V 10mA 7.8 x 2.8 x 11.1mm 7.8mm 2.8mm 11.1mm
RS Stock No. 165-7490
Mfr. Part No.T1235-600G-TR
$1.669
Each (On a Reel of 1000)
units
12A Surface Mount D2PAK (TO-263) 35mA 600V - 3 1V - 35mA 10.28 x 9.35 x 4.6mm 10.28mm 9.35mm 4.6mm
RS Stock No. 484-2814
Mfr. Part No.BT139-800
$1.496
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. 829-2715
Mfr. Part No.BTA10-600CRG
$1.994
Each (In a Pack of 10)
units
10A Through Hole TO-220AB 50mA 800V 105A 3 1.3V 600V 25mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS Stock No. 727-1111
Mfr. Part No.BT134-600D,127
$0.728
Each (In a Pack of 10)
units
4A Through Hole SIP 10mA 600V 27A 3 1.5V 600V 10mA 7.8 x 2.8 x 11.1mm 7.8mm 2.8mm 11.1mm
RS Stock No. 811-1111
Mfr. Part No.T1235-600G
$2.354
Each (In a Pack of 5)
units
12A Surface Mount D2PAK (TO-263) 35mA 600V - 3 1V - 35mA 10.28 x 9.35 x 4.6mm 10.28mm 9.35mm 4.6mm
RS Stock No. 169-0637
Mfr. Part No.BT136-600E,127
$0.693
Each (In a Tube of 50)
units
4A Through Hole TO-220AB 25mA 600V 27A 3 1.5V 600V 15mA 10.3 x 4.7 x 9.4mm 10.3mm 4.7mm 9.4mm
RS Stock No. 727-1149
Mfr. Part No.MAC97A6,412
$0.483
Each (In a Pack of 20)
units
0.6A Through Hole SPT 7mA 400V 8.8A 3 2V 400V 10mA 4.8 x 4.2 x 5.2mm 4.8mm 4.2mm 5.2mm
RS Stock No. 714-2580
Mfr. Part No.BTA12-700BRG
$2.768
Each (In a Pack of 5)
units
12A Through Hole TO-220AB 100mA 700V 125A 3 1.5V 700V 50mA - - - -
RS Stock No. 168-9604
Mfr. Part No.BT138X-600E,127
$1.101
Each (In a Tube of 50)
units
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
RS Stock No. 486-3215
Mfr. Part No.T435-600T
$1.346
Each (In a Pack of 5)
units
4A Through Hole TO-220AB 35mA 600V 31A 3 1.3V 600V 35mA 10.4 x 4.6 x 9.15mm 10.4mm 4.6mm 9.15mm
RS Stock No. 714-2637
Mfr. Part No.BTB24-600CWRG
$4.50
Each (In a Pack of 5)
units
25A Through Hole TO-220AB 35mA 600V 260A 3 1.3V 600V 50mA 10.4 x 4.6 x 9.15mm 10.4mm 4.6mm 9.15mm
RS Stock No. 877-2611
Mfr. Part No.BTA16-600CRG
$2.469
Each (In a Pack of 10)
units
16A Through Hole TO-220AB 50mA 600V 168A 3 1.3V 600V 25mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS Stock No. 795-8690
Mfr. Part No.Z0107MA 1AA2
$0.678
Each (In a Pack of 25)
units
1A Through Hole TO-92 7mA 600V 8.5A 3 1.3V - 10mA 4.7 x 3.7 x 4.4mm 4.7mm 3.7mm 4.4mm
Related Products
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 ...
40 Amp bi-directional solid state switch series is ...
Description:
40 Amp bi-directional solid state switch series is designed for AC switching and phase control applications such as motor speed and temperature modulation controls, lighting controls, and static switching relays. Alternistor type devices only operate in quadrants I, II, & ...
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 ...
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 ...