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. 177-5211
Mfr. Part No.MAC15A8G
BrandLittelfuse
TWD32.10
Each (In a Box of 500)
units
15A Through Hole TO-220AB 75mA 600V 150A 3 2.5V 600V 40mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS Stock No. 862-4926
Mfr. Part No.MAC15A8G
BrandLittelfuse
TWD45.80
Each (In a Pack of 10)
units
15A Through Hole TO-220AB 75mA 600V 150A 3 2.5V 600V 40mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS Stock No. 177-5221
Mfr. Part No.MAC4DCNT4G
BrandLittelfuse
TWD21.90
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. 800-9721
Mfr. Part No.BTA16-600CW3G
BrandLittelfuse
TWD49.80
Each (In a Pack of 10)
units
16A Through Hole TO-220 35mA 600V 170A 3 1.7V 800V 50mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS Stock No. 806-2403
Mfr. Part No.MAC4DCNT4G
BrandLittelfuse
TWD31.30
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. 806-2438
Mfr. Part No.MAC8SNG
BrandLittelfuse
TWD31.40
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. 878-3908
Mfr. Part No.Q4008R4
BrandLittelfuse
TWD25.20
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. 807-9934
Mfr. Part No.MAC4DLMT4G
BrandLittelfuse
TWD24.30
Each (In a Pack of 50)
units
4A Surface Mount DPAK (TO-252) 5mA 600V 40A 3 1.3V 600V 15mA 6.73 x 6.22 x 2.38mm 6.73mm 6.22mm 2.38mm
RS Stock No. 171-0134
Mfr. Part No.MAC4DCMT4G
BrandLittelfuse
TWD18.50
Each (On a Reel of 2500)
units
4A Surface Mount DPAK (TO-252) 35mA 600V 40A 3 1.3V 600V 35mA 6.73 x 6.22 x 2.38mm 6.73mm 6.22mm 2.38mm
RS Stock No. 171-9563
Mfr. Part No.Q6040K7TP
BrandLittelfuse
TWD279.00
Each
units
40A Through Hole TO-218AC 100mA 600V 400A 3 2V - 100mA 16 x 4.78 x 21.21mm 16mm 4.78mm 21.21mm
RS Stock No. 165-9919
Mfr. Part No.QK012LH5
BrandLittelfuse
TWD55.80
Each (On a Reel of 500)
units
12A Through Hole TO-220AB 50mA 1000V 120A 3 1.3V 1000V 50mA 10.67 x 4.78 x 15.75mm 10.67mm 4.78mm 15.75mm
RS Stock No. 177-5177
Mfr. Part No.MAC12MG
BrandLittelfuse
TWD26.80
Each (In a Tube of 50)
units
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 Stock No. 177-5195
Mfr. Part No.MAC8NG
BrandLittelfuse
TWD31.00
Each (In a Tube of 50)
units
8A Through Hole TO-220AB 35mA 800V 80A 3 1.5V 800V 40mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS Stock No. 793-1894
Mfr. Part No.L4008D6RP
BrandLittelfuse
TWD51.00
Each (In a Pack of 5)
units
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
RS Stock No. 800-9768
Mfr. Part No.BTB16-800CW3G
BrandLittelfuse
TWD35.20
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. 177-5192
Mfr. Part No.MAC8SNG
BrandLittelfuse
TWD29.90
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. 121-6472
Mfr. Part No.BTA16-600CW3G
BrandLittelfuse
TWD56.90
Each (In a Tube of 50)
units
16A Through Hole TO-220 35mA 600V 170A 3 1.7V 800V 50mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS Stock No. 808-3977
Mfr. Part No.MAC8NG
BrandLittelfuse
TWD31.00
Each (In a Pack of 20)
units
8A Through Hole TO-220AB 35mA 800V 80A 3 1.5V 800V 40mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS Stock No. 171-9494
Mfr. Part No.Q4004L3TP
BrandLittelfuse
TWD32.60
Each (In a Tube of 500)
units
4A Through Hole TO-220AB 10mA 400V 55A 3 1.3V - 20mA 10.67 x 4.78 x 15.75mm 10.67mm 4.78mm 15.75mm
RS Stock No. 177-5190
Mfr. Part No.MAC228A8TG
BrandLittelfuse
TWD35.80
Each (In a Tube of 50)
units
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