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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Beskrivning Pris 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-artikelnummer 121-6884
Tillv. art.nrBCR16CM-12LB#BB0
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16A Through Hole TO-220AB 30mA 600V 170A 3 1.5V 600V - 9.9 x 4.5 x 15.7mm 9.9mm 4.5mm 15.7mm
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Tillv. art.nrBCR3FM-12RB#BB0
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3A Through Hole TO-220FP 15mA - 30A 3 1.5V 600V - 10.16 x 4.7 x 15.87mm 10.16mm 4.7mm 15.87mm
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Tillv. art.nrBCR20FM-12LB#BB0
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20A Through Hole TO-220FP 30mA 600V 200A 3 1.5V 600V - 10.16 x 4.7 x 15.87mm 10.16mm 4.7mm 15.87mm
RS-artikelnummer 121-6888
Tillv. art.nrBCR5AS-12A-T13#B00
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5A Surface Mount MP 3A 30mA 600V 50A 3+Tab 1.5V 600V - 6.6 x 6.1 x 2.3mm 6.6mm 6.1mm 2.3mm
RS-artikelnummer 124-3651
Tillv. art.nrBCR12FM-14LJ#BB0
11,094 kr
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12A Through Hole TO-220FP 30mA - 120A 3 1.5V 800V - 10.16 x 4.7 x 15.87mm 10.16mm 4.7mm 15.87mm
RS-artikelnummer 124-3664
Tillv. art.nrBCR8PM-12LG1AS#B00
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8A Through Hole TO-220F 30mA - 80A 3 1.5V 600V - 10.5 x 4.5 x 17mm 10.5mm 4.5mm 17mm
RS-artikelnummer 124-3663
Tillv. art.nrBCR8PM-12LG1A8#B00
9,646 kr
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8A Through Hole TO-220F 30mA - 80A 3 1.5V 600V - 10.5 x 4.5 x 17mm 10.5mm 4.5mm 17mm
RS-artikelnummer 124-3657
Tillv. art.nrBCR3AM-14B#B00
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3A Through Hole TO-92 30mA - 30A 3 1.5V 800V - 5 x 3.6 x 5mm 5mm 3.6mm 5mm
RS-artikelnummer 124-3650
Tillv. art.nrBCR08AM-14A#B00
3,166 kr
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0.8A Through Hole TO-92 5mA - 8A 3 2V 700V - 5 x 3.6 x 5mm 5mm 3.6mm 5mm
RS-artikelnummer 121-6886
Tillv. art.nrBCR1AM-12A-A6#C01
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1A Through Hole TO-92 7mA 600V 10A 3 2V 600V - 5 x 3.6 x 5mm 5mm 3.6mm 5mm
RS-artikelnummer 124-3653
Tillv. art.nrBCR16LM-14LB#B00
12,37 kr
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16A Through Hole TO-220FL 30mA - 160A 3 1.5V 800V - 10 x 4.5 x 15mm 10mm 4.5mm 15mm
RS-artikelnummer 124-3659
Tillv. art.nrBCR3FM-12RB#GA1
7,55 kr
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3A Through Hole TO-220FP 15mA - 30A 3 1.5V 600V - 10.16 x 4.7 x 15.87mm 10.16mm 4.7mm 15.87mm
RS-artikelnummer 124-3655
Tillv. art.nrBCR20CM-12LB#BB0
15,80 kr
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20A Through Hole TO-220AB 30mA 600V 200A 3 1.5V 600V - 9.9 x 4.5 x 15.7mm 9.9mm 4.5mm 15.7mm
RS-artikelnummer 124-3660
Tillv. art.nrBCR3PM-12LA#B00
8,908 kr
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3A Through Hole TO-220F 20mA - 30A 3 1.5V 600V - 10.5 x 4.5 x 17mm 10.5mm 4.5mm 17mm