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. 727-1120
Mfr. Part No.BT136-600E,127
HK$3.738
Each (In a Pack of 10)
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. 687-0937
Mfr. Part No.T405Q-600B-TR
HK$5.695
Each (In a Pack of 10)
units
4A Surface Mount DPAK (TO-252) 10mA 600V 38A 3 1.5V 600V 10mA 6.6 x 6.2 x 2.4mm 6.6mm 6.2mm 2.4mm
RS Stock No. 145-9251
Mfr. Part No.BTB24-600BRG
HK$13.171
Each (In a Tube of 50)
units
25A Through Hole TO-220AB 100mA 800V 260A 3 1.3V 600V 80mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS Stock No. 486-0957
Mfr. Part No.BTB04-600SL
HK$7.634
Each (In a Pack of 5)
units
4A Through Hole TO-220AB 25mA 600V 38A 3 1.3V 600V 15mA 10.4 x 4.6 x 9.15mm 10.4mm 4.6mm 9.15mm
RS Stock No. 876-5742
Mfr. Part No.T810T-8FP
HK$13.81
Each (In a Pack of 5)
units
8A Through Hole TO-220ABFP 10mA 800V 63A 3 1.3V - 15mA 10.4 x 4.6 x 16.4mm 10.4mm 4.6mm 16.4mm
RS Stock No. 188-8266
Mfr. Part No.BTB41-800BRG
HK$43.766
Each (In a Tube of 30)
units
41A Through Hole TOP 50mA - 420A 3 - 800V 80mA 15.5 x 4.6 x 21.1mm 15.5mm 4.6mm 21.1mm
RS Stock No. 829-3809
Mfr. Part No.BTA06-600TWRG
HK$6.88
Each (In a Pack of 10)
units
6A Through Hole TO-220AB 5mA 800V 63A 3 1.3V 600V 10mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS Stock No. 687-0953
Mfr. Part No.T1250-600G-TR
HK$8.388
Each (In a Pack of 5)
units
12A Surface Mount D2PAK (TO-263) 50mA 600V 126A 3 1.3V 600V 50mA 10.28 x 9.35 x 4.6mm 10.28mm 9.35mm 4.6mm
RS Stock No. 800-9721
Mfr. Part No.BTA16-600CW3G
BrandLittelfuse
HK$12.16
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. 121-6472
Mfr. Part No.BTA16-600CW3G
BrandLittelfuse
HK$12.68
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. 163-9814
Mfr. Part No.T3035H-6G-TR
HK$18.80
Each (In a Pack of 5)
units
30A Surface Mount D2PAK 35mA 600V 284A 2 + Tab 1V - 75mA 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
HK$7.804
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. 544-9961
Mfr. Part No.2N6075AG
BrandLittelfuse
HK$5.54
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. 168-8848
Mfr. Part No.T810T-8FP
HK$8.502
Each (In a Tube of 50)
units
8A Through Hole TO-220ABFP 10mA 800V 63A 3 1.3V - 15mA 10.4 x 4.6 x 16.4mm 10.4mm 4.6mm 16.4mm
RS Stock No. 168-7887
Mfr. Part No.T810H-6G
HK$10.844
Each (In a Tube of 50)
units
8A Surface Mount D2PAK (TO-263) 10mA 600V 84A 3 1V 600V 25mA 10.28 x 9.35 x 4.6mm 10.28mm 9.35mm 4.6mm
RS Stock No. 792-0695
Mfr. Part No.BT134W-600D
HK$3.46
Each (In a Pack of 20)
units
1A Surface Mount SOT-223 10mA 600V 11A 3+Tab 0.4V 600V 10mA 6.7 x 3.7 x 1.8mm 6.7mm 3.7mm 1.8mm
RS Stock No. 168-6277
Mfr. Part No.Z0107MN 5AA4
HK$1.571
Each (On a Reel of 1000)
units
1A Surface Mount SOT-223 7mA 600V 8.5A 3+Tab 1.3V 600V 10mA 6.5 x 3.5 x 1.8mm 6.5mm 3.5mm 1.8mm
RS Stock No. 171-9494
Mfr. Part No.Q4004L3TP
BrandLittelfuse
HK$8.09
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. 714-2675
Mfr. Part No.Z0410MF 1AA2
HK$4.77
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. 792-0759
Mfr. Part No.MAC97A8
HK$1.35
Each (In a Pack of 40)
units
0.6A Through Hole TO-92 7mA 600V 8.8A 3 2V 600V 10mA 4.2 x 4.8 x 5.2mm 4.2mm 4.8mm 5.2mm
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