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. TerminalsOn the TRIAC symbol there are three terminals. These terminals are,MT1 Anode 1 (Main Terminal 1)MT2 Anode 2 (Main Terminal 2)Gate TerminalApplicationsTRIACs 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

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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. 800-9730
Mfr. Part No.BTA16-800BW3G
BrandLittelfuse
R 22.898
Each (In a Pack of 10)
units
16A Through Hole TO-220 50mA 800V 170A 3 1.7V 800V 60mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS stock no. 800-9715
Mfr. Part No.BTA12-600BW3G
BrandLittelfuse
R 30.288
Each (In a Pack of 10)
units
12A Through Hole TO-220 50mA 600V 105A 3 1.7V 800V 50mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS stock no. 805-1609
Mfr. Part No.MAC12HCMG
BrandLittelfuse
R 8.521
Each (In a Pack of 10)
units
12A Through Hole TO-220AB 50mA 600V 100A 3 1.5V 800V 60mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS stock no. 177-5184
Mfr. Part No.MAC12HCMG
BrandLittelfuse
R 8.901
Each (In a Tube of 50)
units
12A Through Hole TO-220AB 50mA 600V 100A 3 1.5V 800V 60mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS stock no. 774-3640
Mfr. Part No.T2500DG
BrandLittelfuse
R 21.475
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. 177-5206
Mfr. Part No.T2500DG
BrandLittelfuse
R 12.721
Each (In a Box of 500)
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. 878-1895
Mfr. Part No.Q6012LH5
BrandLittelfuse
R 29.474
Each (In a Pack of 10)
units
12A Through Hole TO-220 50mA 600V 120A 3 1.3V - 50mA 10.67 x 4.78 x 15.75mm 10.67mm 4.78mm 15.75mm
RS stock no. 878-1766
Mfr. Part No.L601E3
BrandLittelfuse
R 7.235
Each (In a Pack of 2000)
units
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
RS stock no. 800-9755
Mfr. Part No.BTB12-600BW3G
BrandLittelfuse
R 18.571
Each (In a Pack of 10)
units
12A Through Hole TO-220 50mA 600V 120A 3 1.7V 800V 50mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS stock no. 878-3908
Mfr. Part No.Q4008R4
BrandLittelfuse
R 13.867
Each (In a Pack of 500)
units
8A Through Hole TO-220 25mA 400V 100A 3 1.3V - 50mA 10.67 x 4.78 x 15.75mm 10.67mm 4.78mm 15.75mm
RS stock no. 177-5181
Mfr. Part No.BTB12-600BW3G
BrandLittelfuse
R 16.928
Each (In a Tube of 50)
units
12A Through Hole TO-220 50mA 600V 120A 3 1.7V 800V 50mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS stock no. 177-5192
Mfr. Part No.MAC8SNG
BrandLittelfuse
R 13.082
Each (In a Tube of 50)
units
8A Through Hole TO-220AB 5mA 800V 70A 3 1.5V 800V 10mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS stock no. 806-2438
Mfr. Part No.MAC8SNG
BrandLittelfuse
R 14.528
Each (In a Pack of 10)
units
8A Through Hole TO-220AB 5mA 800V 70A 3 1.5V 800V 10mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS stock no. 805-1605
Mfr. Part No.MAC12DG
BrandLittelfuse
R 10.416
Each (In a Pack of 10)
units
12A Through Hole TO-220AB 35mA 400V 100A 3 1.5V 800V 40mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS stock no. 165-9920
Mfr. Part No.Q8025NH6RP
BrandLittelfuse
R 31.166
Each (On a Reel of 500)
units
25A Surface Mount D2PAK (TO-263) 80mA 800V 250A 3 2.5V 800V 100mA 10.67 x 9.4 x 4.78mm 10.67mm 9.4mm 4.78mm
RS stock no. 177-5221
Mfr. Part No.MAC4DCNT4G
BrandLittelfuse
R 12.158
Each (On a Reel of 2500)
units
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 stock no. 806-2403
Mfr. Part No.MAC4DCNT4G
BrandLittelfuse
R 13.401
Each (In a Pack of 20)
units
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 stock no. 800-9768
Mfr. Part No.BTB16-800CW3G
BrandLittelfuse
R 16.91
Each (In a Pack of 10)
units
16A Through Hole TO-220 35mA 800V 170A 3 1.7V 800V 50mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS stock no. 793-1917
Mfr. Part No.Q8025NH6RP
BrandLittelfuse
R 31.684
Each (In a Pack of 5)
units
25A Surface Mount D2PAK (TO-263) 80mA 800V 250A 3 2.5V 800V 100mA 10.67 x 9.4 x 4.78mm 10.67mm 9.4mm 4.78mm
RS stock no. 177-5183
Mfr. Part No.MAC12DG
BrandLittelfuse
R 10.281
Each (In a Tube of 50)
units
12A Through Hole TO-220AB 35mA 400V 100A 3 1.5V 800V 40mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm