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 102-4122
製造零件編號BTB08-600BRG
HK$6.925
毎管:50 個
單位
8A Through Hole TO-220AB 100mA 800V 84A 3 1.3V 600V 50mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS庫存編號 168-6839
製造零件編號BTA12-600SWRG
HK$8.003
毎管:50 個
單位
12A Through Hole TO-220AB 10mA 800V 126A 3 1.3V 600V 15mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS庫存編號 829-4070
製造零件編號BTB08-600BRG
HK$9.58
/個 (每包:10個)
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8A Through Hole TO-220AB 100mA 800V 84A 3 1.3V 600V 50mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS庫存編號 178-1398
製造零件編號BTA26-800BRG
HK$33.628
毎管:30 個
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25A Through Hole TOP3 100mA 800V 260A 3 1.3V 800V 80mA 15.5 x 4.6 x 21.1mm 15.5mm 4.6mm 21.1mm
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 177-5183
製造零件編號MAC12DG
BrandLittelfuse
HK$6.25
毎管:50 個
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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庫存編號 806-2444
製造零件編號MAC9NG
BrandLittelfuse
HK$6.327
/個 (每包:10個)
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8A Through Hole TO-220AB 50mA 800V 80A 3 1.5V 800V 50mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS庫存編號 509-421
製造零件編號BT138X-800,127
HK$6.726
/個 (每包:5個)
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12A Through Hole TO-220F 70mA 800V 105A 3 1.5V 800V 30mA 10.3 x 4.6 x 9.3mm 10.3mm 4.6mm 9.3mm
RS庫存編號 166-1423
製造零件編號BT131-600
HK$0.987
個 (以毎袋:1000)
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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庫存編號 180-7263
製造零件編號VO3062
BrandVishay
HK$9.07
/個 (每包:10個)
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- Through Hole DIP 10mA 6V 1 (Non-Reptitive)A 6 22V 600V - 9 x 6.4 x 3.5mm 9mm 6.4mm 3.5mm
RS庫存編號 168-6239
製造零件編號T405-600T
HK$5.658
毎管:50 個
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4A Through Hole TO-220AB 5mA 600V 31A 3 1.3V 600V 10mA 10.4 x 4.6 x 9.15mm 10.4mm 4.6mm 9.15mm
RS庫存編號 124-2436
製造零件編號Z0103MN,135
HK$1.00
個 (在毎卷:4000)
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1A Surface Mount SOT-223 (SC-73) 5mA 600V 8.5A 4 1.3V 600V 7mA 6.7 x 3.7 x 1.7mm 6.7mm 3.7mm 1.7mm
RS庫存編號 878-1656
製造零件編號Q6008L5
BrandLittelfuse
HK$8.383
/個 (每包:500個)
單位
8A Through Hole TO-220 50mA 600V 100A 3 1.3V - 50mA 10.67 x 4.78 x 15.75mm 10.67mm 4.78mm 15.75mm
RS庫存編號 198-4325
製造零件編號BTA212-800B,127
HK$10.56
單位
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庫存編號 793-1894
製造零件編號L4008D6RP
BrandLittelfuse
HK$9.844
/個 (每包:5個)
單位
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
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RS庫存編號 188-8530
製造零件編號BTB41-800BRG
HK$51.96
/個 (每包:2個)
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41A Through Hole TOP 50mA - 420A 3 - 800V 80mA 15.5 x 4.6 x 21.1mm 15.5mm 4.6mm 21.1mm
RS庫存編號 168-8848
製造零件編號T810T-8FP
HK$8.502
毎管:50 個
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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庫存編號 486-3186
製造零件編號T405-600H
HK$5.986
/個 (每包:5個)
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4A Through Hole IPAK (TO-251) 5mA 600V 31A 3 1.3V 600V 10mA 6.6 x 2.4 x 6.2mm 6.6mm 2.4mm 6.2mm
RS庫存編號 198-4319
製造零件編號BTA140-800,127
HK$12.15
單位
25A Through Hole TO-220AB 70mA 800V 209A 3 1.5V 800V 30mA 10.3 x 4.7 x 9.4mm 10.3mm 4.7mm 9.4mm
RS庫存編號 816-7827
製造零件編號BTA225-800B
HK$11.602
/個 (每包:5個)
單位
25A Through Hole TO-220AB 50mA 800V 209A 3 1.5V 800V 60mA 10.3 x 4.5 x 15.8mm 10.3mm 4.5mm 15.8mm