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. 165-9777
Mfr. Part No.BT137S-600D
HK$2.913
Each (On a Reel of 2500)
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. 829-2715
Mfr. Part No.BTA10-600CRG
HK$10.639
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. 509-572
Mfr. Part No.BT131-600
HK$2.427
Each (In a Pack of 20)
units
1A Through Hole SPT 7mA 600V 13.8A 3 1.5V 600V 5mA 4.8 x 4.2 x 5.2mm 4.8mm 4.2mm 5.2mm
RS Stock No. 806-2362
Mfr. Part No.MAC12SNG
BrandLittelfuse
HK$7.239
Each (In a Pack of 10)
units
12A Through Hole TO-220AB 5mA 800V 90A 3 1.5V 800V 10mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS Stock No. 687-1088
Mfr. Part No.ACS102-6T1-TR
HK$6.912
Each (In a Pack of 10)
units
- Surface Mount SOIC - - - 8 - - - 5 x 4 x 1.25mm 5mm 4mm 1.25mm
RS Stock No. 188-8446
Mfr. Part No.T3050H-6T
HK$29.162
Each (In a Pack of 5)
units
30A Through Hole TO-220AB - - 284A 3 - 600V 75mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS Stock No. 774-3495
Mfr. Part No.MAC12MG
BrandLittelfuse
HK$8.10
Each (In a Pack of 5)
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. 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. 165-7783
Mfr. Part No.T1235H-6G-TR
HK$5.872
Each (On a Reel of 1000)
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. 168-8849
Mfr. Part No.T1610T-8FP
HK$6.054
Each (In a Tube of 50)
units
16A Through Hole TO-220ABFP 10mA 800V 126A 3 1.3V - 15mA 10.4 x 4.6 x 16.4mm 10.4mm 4.6mm 16.4mm
RS Stock No. 177-5188
Mfr. Part No.MAC16CNG
BrandLittelfuse
HK$8.978
Each (In a Tube of 50)
units
16A Through Hole TO-220AB 35mA 800V 150A 3 1.5V 800V 50mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
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. 165-7646
Mfr. Part No.Z0410MF 1AA2
HK$2.202
Each (In a Bag of 250)
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. 486-3215
Mfr. Part No.T435-600T
HK$6.668
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. 168-6840
Mfr. Part No.BTB06-600BWRG
HK$6.824
Each (In a Tube of 50)
units
6A Through Hole TO-220AB 50mA 600V 63A 3 1.3V 600V 50mA 10.4 x 4.6 x 9.15mm 10.4mm 4.6mm 9.15mm
RS Stock No. 168-7888
Mfr. Part No.T1635H-6I
HK$10.769
Each (In a Tube of 50)
units
16A Through Hole TO-220AB 35mA 600V 168A 3 1V 600V 35mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS Stock No. 198-4325
Mfr. Part No.BTA212-800B,127
HK$10.56
Each
units
12A Through Hole TO-220AB 50mA 800V 105A 3 1.5V 800V 60mA 10.3 x 4.7 x 9.4mm 10.3mm 4.7mm 9.4mm
RS Stock No. 188-8264
Mfr. Part No.BTA24-800CWRG
HK$21.41
Each (In a Tube of 50)
units
25A Through Hole TO-220AB 50mA - 260A 3 - 800V 50mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS Stock No. 165-9946
Mfr. Part No.BT134W-600D
HK$1.995
Each (On a Reel of 1000)
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. 829-0349
Mfr. Part No.BTB12-600BWRG
HK$10.65
Each (In a Pack of 5)
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
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