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 829-0481
製造零件編號BTB24-600BRG
HK$15.818
/個 (每包:5個)
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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庫存編號 262-494
製造零件編號BT139-600
HK$15.32
單位
16A Through Hole TO-220AB 70mA 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 145-8613
製造零件編號BTA26-600BRG
HK$23.455
毎管:50 個
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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 177-5199
製造零件編號2N6073BG
BrandLittelfuse
HK$4.386
個 (以毎盒:500)
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4A Through Hole TO-225 20mA 400V 30A 3 2.5V 400V 30mA 7.74 x 2.66 x 11.04mm 7.74mm 2.66mm 11.04mm
RS庫存編號 102-4086
製造零件編號BTA40-800B
HK$61.72
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40A Panel Mount RD-91 100mA 800V 420A 3 1.3V 800V 80mA 40 x 27 x 14mm 40mm 27mm 14mm
RS庫存編號 793-1908
製造零件編號Q8025L6
BrandLittelfuse
HK$39.252
/個 (每包:5個)
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25A Through Hole TO-220AB 80mA 800V 250A 3 1.3V 800V 100mA 10.67 x 4.78 x 15.75mm 10.67mm 4.78mm 15.75mm
RS庫存編號 877-2649
製造零件編號BTB16-800BWRG
HK$12.496
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16A Through Hole TO-220AB 50mA 800V 168A 3 1.3V 800V 50mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm
RS庫存編號 727-1120
製造零件編號BT136-600E,127
HK$3.738
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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庫存編號 180-7056
製造零件編號VO3062
BrandVishay
HK$8.208
毎管:50 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 165-7489
製造零件編號T2535-600G-TR
HK$11.219
個 (在毎卷:1000)
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25A Surface Mount D2PAK (TO-263) 35mA 600V 260A 3 1.3V 600V 80mA 10.28 x 9.35 x 4.6mm 10.28mm 9.35mm 4.6mm
RS庫存編號 774-3640
製造零件編號T2500DG
BrandLittelfuse
HK$11.68
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6A Through Hole TO-220AB 60mA 400V 60A 3 2.5V 400V 30mA 10.28 x 4.82 x 15.75mm 10.28mm 4.82mm 15.75mm
RS庫存編號 180-7057
製造零件編號VO3063
BrandVishay
HK$8.208
毎管:50 個
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- Through Hole DIP 5mA 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 145-8696
製造零件編號ACS108-8SUN-TR
HK$1.875
個 (在毎卷:1000)
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0.8A Surface Mount SMBflat 10mA 800V - 3 1V 800V 10mA 4.6 x 3.95 x 1.1mm 4.6mm 3.95mm 1.1mm
全新
RS庫存編號 188-8446
製造零件編號T3050H-6T
HK$29.162
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RS庫存編號 165-7490
製造零件編號T1235-600G-TR
HK$7.343
個 (在毎卷:1000)
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12A Surface Mount D2PAK (TO-263) 35mA 600V - 3 1V - 35mA 10.28 x 9.35 x 4.6mm 10.28mm 9.35mm 4.6mm
RS庫存編號 800-9743
製造零件編號BTA30-800CW3G
BrandLittelfuse
HK$27.62
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30A Through Hole TO-220 35mA 800V 400A 3 1.3V 800V 50mA 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
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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 687-0915
製造零件編號T1235-600G-TR
HK$10.99
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12A Surface Mount D2PAK (TO-263) 35mA 600V 126A 3 1.3V 600V 35mA 10.28 x 9.35 x 4.6mm 10.28mm 9.35mm 4.6mm
RS庫存編號 877-2637
製造零件編號BTB12-600SWRG
HK$8.784
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12A Through Hole TO-220AB 10mA 600V 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 168-7887
製造零件編號T810H-6G
HK$10.844
毎管:50 個
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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