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 581 - 595 of 595 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. 774-3640
Mfr. Part No.T2500DG
BrandLittelfuse
$2.575
Each (In a Pack of 2)
units
6A Through Hole TO-220AB 60mA 400V 60A 3 2.5V 400V 30mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS Stock No. 168-6842
Mfr. Part No.BTB06-600TRG
$1.617
Each (In a Tube of 50)
units
6A Through Hole TO-220AB 5mA 600V 63A 3 1.5V 600V 15mA 10.5 x 4.82 x 9.02mm 10.5mm 4.82mm 9.02mm
RS Stock No. 165-6742
Mfr. Part No.Z0109MN 5AA4
$0.224
Each (On a Reel of 1000)
units
1A Surface Mount SOT-223 10mA 600V 8.5A 3+Tab 1.3V - 10mA 6.7 x 3.7 x 1.8mm 6.7mm 3.7mm 1.8mm
RS Stock No. 829-0618
Mfr. Part No.T2035H-6T
$4.642
Each (In a Pack of 5)
units
20A Through Hole TO-220AB 35mA 600V 210A 3 1V 600V 35mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS Stock No. 484-2779
Mfr. Part No.BT137-600D
$1.162
Each (In a Pack of 5)
units
8A Through Hole TO-220AB 10mA 600V 71A 3 1.5V 600V 10mA 10.3 x 4.7 x 9.4mm 10.3mm 4.7mm 9.4mm
RS Stock No. 486-5182
Mfr. Part No.T410-600T
$1.786
Each (In a Pack of 5)
units
4A Through Hole TO-220AB 10mA 600V 31A 3 1.3V 600V 15mA 10.4 x 4.6 x 9.15mm 10.4mm 4.6mm 9.15mm
RS Stock No. 145-8661
Mfr. Part No.BTA12-800BWRG
$0.762
Each (In a Tube of 30)
units
12A Through Hole TO-220AB 50mA 800V 126A 3 1.3V 600V 50mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS Stock No. 687-1031
Mfr. Part No.T810-600B
$2.568
Each (In a Pack of 5)
units
8A Surface Mount DPAK (TO-252) 10mA 600V 84A 3 1.3V 600V 15mA 6.6 x 6.2 x 2.4mm 6.6mm 6.2mm 2.4mm
RS Stock No. 829-1510
Mfr. Part No.T2550-12G
$6.14
Each (In a Pack of 2)
units
25A Surface Mount D2PAK (TO-263) 50mA 1200V 252A 3 1.3V 1200V 60mA 10.28 x 9.35 x 4.6mm 10.28mm 9.35mm 4.6mm
RS Stock No. 687-0947
Mfr. Part No.T1235H-6G-TR
$2.64
Each (In a Pack of 5)
units
12A Surface Mount D2PAK (TO-263) 35mA 600V 126A 3 1V 600V 35mA 10.28 x 9.35 x 4.6mm 10.28mm 9.35mm 4.6mm
RS Stock No. 792-0709
Mfr. Part No.BT137S-600D
$0.784
Each (In a Pack of 10)
units
8A Surface Mount DPAK (TO-252) 5mA 600V 71A 3 1V 600V 10mA 6.73 x 6.22 x 2.38mm 6.73mm 6.22mm 2.38mm
RS Stock No. 714-0515
Mfr. Part No.BTA26-600BRG
$6.95
Each
units
25A Through Hole TOP3 100mA 600V 260A 3 1.3V 600V 80mA 15.5 x 4.6 x 12.85mm 15.5mm 4.6mm 12.85mm
RS Stock No. 145-9301
Mfr. Part No.BTB12-600SWRG
$2.167
Each (In a Tube of 30)
units
12A Through Hole TO-220AB 10mA 600V 126A 3 1.3V 600V 15mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS Stock No. 177-5199
Mfr. Part No.2N6073BG
BrandLittelfuse
$0.74
Each (In a Box of 500)
units
4A Through Hole TO-225 20mA 400V 30A 3 2.5V 400V 30mA 7.74 x 2.66 x 11.04mm 7.74mm 2.66mm 11.04mm
RS Stock No. 145-9300
Mfr. Part No.BTB06-600SWRG
$1.628
Each (In a Tube of 30)
units
6A Through Hole TO-220AB 10mA 600V 63A 3 1.3V 600V 15mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
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, & ...
Available in high power packages, the BTA/BTB40-41 series ...
Description:
Available in high power packages, the BTA/BTB40-41 series is suitable for general purpose AC switching. The BTA series provides an insulated tab (rated at 2500 V rms). High current TRIACHigh commutation capability. Low thermal resistance with clip bonding. ApplicationsOn/off function ...
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 ...