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 714-0515
製造零件編號BTA26-600BRG
HK$30.77
單位
25A Through Hole TOP3 100mA 600V 260A 3 1.3V 600V 80mA 15.5 x 4.6 x 12.85mm 15.5mm 4.6mm 12.85mm
RS庫存編號 877-2646
製造零件編號BTB16-600BRG
HK$9.812
/個 (每包:10個)
單位
16A Through Hole TO-220AB 100mA 600V 168A 3 1.3V 600V 50mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS庫存編號 687-0990
製造零件編號TPDV1225RG
HK$76.63
單位
25A Through Hole TOP3 150mA 1200V 390A 3 1.5V 1200V - 15.5 x 4.6 x 12.85mm 15.5mm 4.6mm 12.85mm
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 687-1025
製造零件編號T2035H-6I
HK$20.925
/個 (每包:2個)
單位
20A Through Hole TO-220AB 35mA 600V 210A 3 1V 600V 35mA 10.4 x 4.6 x 9.3mm 10.4mm 4.6mm 9.3mm
RS庫存編號 146-0398
製造零件編號BT139X-600F
HK$4.175
個 (在毎卷:50)
單位
16A Through Hole TO-220F 70mA 600V 170A 3 1.5V 600V 45mA 10.3 x 4.6 x 15.8mm 10.3mm 4.6mm 15.8 (With Tab)mm
RS庫存編號 878-1716
製造零件編號L401E3
BrandLittelfuse
HK$6.35
/個 (每包:50個)
單位
1A Through Hole TO-92 3mA 400V 20A 3 1.3V - 5mA 4.73 x 3.68 x 4.98mm 4.73mm 3.68mm 4.98mm
RS庫存編號 800-9724
製造零件編號BTA12-600CW3G
BrandLittelfuse
HK$10.939
/個 (每包:10個)
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12A Through Hole TO-220 35mA 600V 105A 3 1.7V 800V 45mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS庫存編號 806-2393
製造零件編號MAC228A8TG
BrandLittelfuse
HK$12.18
/個 (每包:10個)
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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
RS庫存編號 168-6838
製造零件編號BTA06-600TRG
HK$7.562
毎管:50 個
單位
6A Through Hole TO-220AB 5mA 600V 63A 3 1.5V 600V 15mA 10.5 x 4.82 x 9.02mm 10.5mm 4.82mm 9.02mm
RS庫存編號 168-7868
製造零件編號TPDV640RG
HK$39.527
毎管:30 個
單位
40A Through Hole TOP3 200mA 600V 590A 3 1.5V 600V 50mA 15.5 x 4.6 x 21.1mm 15.5mm 4.6mm 21.1mm
RS庫存編號 484-2820
製造零件編號BT139X-800,127
HK$7.804
/個 (每包:5個)
單位
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庫存編號 792-0734
製造零件編號BTA312-800C
HK$4.299
/個 (每包:10個)
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12A Through Hole TO-220AB 35mA 800V 110A 3 1.5V 800V 35mA 10.3 x 4.7 x 16mm 10.3mm 4.7mm 16 (With Tab)mm
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
RS庫存編號 165-9895
製造零件編號BTA316X-600E
HK$6.144
個 (在毎卷:50)
單位
16A Through Hole TO-220F 10mA 600V 150A 3 1.5V 600V 15mA 10.3 x 4.6 x 15.8mm 10.3mm 4.6mm 15.8 (With Tab)mm
RS庫存編號 180-7189
製造零件編號VOM3052T
BrandVishay
HK$7.55
/個 (每包:10個)
單位
- Surface Mount SOP 10mA 6V 0.5A 4 - 600V 0.3mA 4.57 x 4.42 x 1.97mm 4.57mm 4.42mm 1.97mm
RS庫存編號 877-2564
製造零件編號ACST410-8BTR
HK$9.213
/個 (每包:10個)
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4A Surface Mount DPAK (TO-252) 10mA 800V 32A 3 1V 800V 20mA 6.73 x 6.22 x 2.4mm 6.73mm 6.22mm 2.4mm
RS庫存編號 727-1127
製造零件編號BT137-600E,127
HK$5.152
/個 (每包:5個)
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8A Through Hole TO-220AB 25mA 600V 71A 3 1.5V 600V 20mA 10.3 x 4.7 x 9.4mm 10.3mm 4.7mm 9.4mm
RS庫存編號 486-5182
製造零件編號T410-600T
HK$8.082
/個 (每包:5個)
單位
4A Through Hole TO-220AB 10mA 600V 31A 3 1.3V 600V 15mA 10.4 x 4.6 x 9.15mm 10.4mm 4.6mm 9.15mm
RS庫存編號 171-9498
製造零件編號Q6030LH5TP
BrandLittelfuse
HK$20.545
毎管:500 個
單位
30A Through Hole TO-220AB 50mA 600V 350A 3 2.75V - 50mA 10.67 x 4.78 x 15.75mm 10.67mm 4.78mm 15.75mm