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

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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庫存編號 687-1047
製造零件編號BTA16-600CWRG
HK$13.846
/個 (每包:5個)
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16A Through Hole TO-220AB 35mA 600V 168A 3 1.3V 600V 35mA 10.4 x 4.6 x 9.3mm 10.4mm 4.6mm 9.3mm
RS庫存編號 727-1139
製造零件編號BT139-600E,127
HK$7.422
/個 (每包:5個)
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16A Through Hole TO-220AB 25mA 600V 170A 3 1.5V 600V 45mA 10.3 x 4.7 x 9.4mm 10.3mm 4.7mm 9.4mm
RS庫存編號 806-2374
製造零件編號MAC16CNG
BrandLittelfuse
HK$8.891
/個 (每包:10個)
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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庫存編號 168-6786
製造零件編號BTB24-600BWRG
HK$11.12
毎管:50 個
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25A Through Hole TO-220AB 50mA 600V 260A 3 1.3V 600V 75mA 10.4 x 4.6 x 9.15mm 10.4mm 4.6mm 9.15mm
RS庫存編號 810-7332
製造零件編號BTA12-600BRG
HK$9.342
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12A Through Hole TO-220AB 50 mA, 100 mA 600V 126A 3 1.3V 600V 50mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS庫存編號 829-3809
製造零件編號BTA06-600TWRG
HK$18.46
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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庫存編號 168-6652
製造零件編號T1250-600G-TR
HK$4.807
個 (在毎卷:1000)
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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庫存編號 170-2400
製造零件編號FT0407MH TU
HK$3.232
毎管:50 個
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4A Through Hole TO-220AB 5mA 600V - 3 1.3V 600V 15mA 10.36 x 4.67 x 15.35mm 10.36mm 4.67mm 15.35mm
RS庫存編號 727-1145
製造零件編號BT137-600G,127
HK$4.30
/個 (每包:5個)
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8A Through Hole TO-220AB 100mA 600V 71A 3 1.5V 600V 40mA 10.3 x 4.7 x 9.4mm 10.3mm 4.7mm 9.4mm
RS庫存編號 102-4121
製造零件編號BTA08-600CWRG
HK$8.015
毎管:50 個
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8A Through Hole TO-220AB 35mA 800V 84A 3 1.3V 600V 35mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS庫存編號 829-0642
製造零件編號BTA16-600SWRG
HK$13.846
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16A Through Hole TO-220AB 10mA 800V 168A 3 1.3V 600V 15mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS庫存編號 800-9768
製造零件編號BTB16-800CW3G
BrandLittelfuse
HK$7.748
/個 (每包:10個)
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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庫存編號 135-8216
製造零件編號CLA60MT1200NTZ
BrandIXYS
HK$52.476
毎管:30 個
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30A Surface Mount TO-268AA (D3PAK) ±80mA 1200V 410A 3 1.9V 1200V 60mA 16.05 x 14 x 5.1mm 16.05mm 14mm 5.1mm
RS庫存編號 177-5195
製造零件編號MAC8NG
BrandLittelfuse
HK$7.701
毎管:50 個
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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庫存編號 168-8095
製造零件編號T1210T-6I
HK$7.594
毎管:50 個
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12A Through Hole TO-220AB 10mA - 95A 3 1.3V - 10mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS庫存編號 714-2570
製造零件編號BTA10-600BWRG
HK$11.836
/個 (每包:5個)
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10A Through Hole TO-220AB 50mA 800V 105A 3 1.3V 800V 50mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS庫存編號 171-0136
製造零件編號MAC4DSM-1G
BrandLittelfuse
HK$2.96
毎管:75 個
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4A Through Hole DPAK (TO-252) 10mA 600V 40A 3 1.3V 600V 15mA 6.73 x 2.38 x 6.35mm 6.73mm 2.38mm 6.35mm
RS庫存編號 177-5204
製造零件編號MAC228A10G
BrandLittelfuse
HK$7.218
個 (以毎盒:500)
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8A Through Hole TO-220AB 10mA 800V 80A 3 2.5V 800V 15mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS庫存編號 146-0360
製造零件編號BT137-600G,127
HK$3.142
毎管:50 個
單位
8A Through Hole TO-220AB 100mA 600V 71A 3 1.5V 600V 40mA 10.3 x 4.7 x 9.4mm 10.3mm 4.7mm 9.4mm
RS庫存編號 163-9805
製造零件編號T2050H-6G-TR
HK$11.60
/個 (每包:5個)
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20A Surface Mount D2PAK 50mA 600V 210A 2 + Tab 1V - 75mA 10.28 x 9.35 x 4.6mm 10.28mm 9.35mm 4.6mm