Thyristors - TRIACs

Category Introduction

Thyristors conduct AC (alternating current) in one direction or one half of an AC cycle. A TRIAC (triode AC) conducts current in either direction when its gate is triggered. Other names include bidirectional triode thyristor or bilateral triode thyristor. TRIAC types are snubberless, alternistor, internally triggered, logic gate and standard which are chassis, surface or through-hole mount. Selection is by off state voltage, on state current, hold current and gate trigger voltage.

Product List

3814 Items

Mfr Part #	Quantity Available	UnitPrice	Series	Packaging	Product Status	Triac Type	Voltage - Off State	Current - On State (It (RMS)) (Max)	Voltage - Gate Trigger (Vgt) (Max)	Current - Non Rep. Surge 50, 60Hz (Itsm)	Current - Gate Trigger (Igt) (Max)	Current - Hold (Ih) (Max)	Configuration	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package
Z0103MN 5AA4 TRIAC SENS GATE 600V 1A SOT223 STMicroelectronics	593	$0.52		Tape & Reel (TR)	Active	Logic - Sensitive Gate	600 V	1 A	1.3 V	8A, 8.5A	3 mA	7 mA	Single	-40°C ~ 125°C (TJ)	Surface Mount	TO-261-4, TO-261AA	SOT-223
Z0103MNT1G TRIAC SENS GATE 600V 1A SOT223 Littelfuse Inc.	857	$0.58		Tape & Reel (TR)	Active	Logic - Sensitive Gate	600 V	1 A	1.3 V	8A @ 60Hz	3 mA	10 mA	Single	-40°C ~ 125°C (TJ)	Surface Mount	TO-261-4, TO-261AA	SOT-223
Q4004D3RP TRIAC SENS GATE 400V 4A TO252 Littelfuse Inc.	358	$1.70		Tape & Reel (TR)	Active	Logic - Sensitive Gate	400 V	4 A	1.3 V	46A, 55A	10 mA	20 mA	Single	-40°C ~ 125°C (TJ)	Surface Mount	TO-252-3, DPak (2 Leads + Tab), SC-63	TO-252, (D-Pak)
2N6071BG TRIAC SENS GATE 200V 4A TO225AA Littelfuse Inc.	135	$0.80		Bulk	Active	Logic - Sensitive Gate	200 V	4 A	2.5 V	30A @ 60Hz	3 mA	15 mA	Single	-40°C ~ 110°C (TJ)	Through Hole	TO-225AA, TO-126-3	TO-225AA
2N6075BG TRIAC SENS GATE 600V 4A TO225AA Littelfuse Inc.	715	$0.80		Bulk	Active	Logic - Sensitive Gate	600 V	4 A	2.5 V	30A @ 60Hz	3 mA	15 mA	Single	-40°C ~ 110°C (TJ)	Through Hole	TO-225AA, TO-126-3	TO-225AA
Q6008DH3RP TRIAC ALTERNISTOR 600V 8A TO252 Littelfuse Inc.	4	$1.91		Tape & Reel (TR)	Active	Alternistor - Snubberless	600 V	8 A	1.3 V	80A, 85A	10 mA	15 mA	Single	-40°C ~ 125°C (TJ)	Surface Mount	TO-252-3, DPak (2 Leads + Tab), SC-63	TO-252, (D-Pak)
Q6008DH3TP TRIAC ALTERNISTOR 600V 8A TO252 Littelfuse Inc.	747	$1.18		Tube	Active	Alternistor - Snubberless	600 V	8 A	1.3 V	80A, 85A	10 mA	15 mA	Single	-40°C ~ 125°C (TJ)	Surface Mount	TO-252-3, DPak (2 Leads + Tab), SC-63	TO-252, (D-Pak)
2N6073BG TRIAC SENS GATE 400V 4A TO225AA Littelfuse Inc.	66	$0.97		Bulk	Active	Logic - Sensitive Gate	400 V	4 A	2.5 V	30A @ 60Hz	3 mA	15 mA	Single	-40°C ~ 110°C (TJ)	Through Hole	TO-225AA, TO-126-3	TO-225AA
T1235-600G-TR TRIAC ALTERNISTOR 600V 12A D2PAK STMicroelectronics	39	$1.97	Snubberless™	Tape & Reel (TR)	Active	Alternistor - Snubberless	600 V	12 A	1.3 V	120A, 126A	35 mA	35 mA	Single	-40°C ~ 125°C (TJ)	Surface Mount	TO-263-3, D²Pak (2 Leads + Tab), TO-263AB	D2PAK
ACST610-8T TRIAC SENS GATE 800V 6A TO220AB STMicroelectronics	725	$1.18	ACS™/A.S.D®	Tube	Active	Logic - Sensitive Gate	800 V	6 A	1 V	45A, 47A	10 mA	25 mA	Single	-40°C ~ 125°C (TJ)	Through Hole	TO-220-3	TO-220
BTA08-800CW3G TRIAC 800V 8A TO220AB Littelfuse Inc.	473	$1.96		Tube	Active	Standard	800 V	8 A	1.1 V	90A @ 60Hz	35 mA	35 mA	Single	-40°C ~ 125°C (TJ)	Through Hole	TO-220-3	TO-220AB
Q6006LH4TP TRIAC ALTERNISTOR 600V 6A TO220 Littelfuse Inc.	74	$2.76		Tube	Active	Alternistor - Snubberless	600 V	6 A	1.3 V	80A, 85A	35 mA	35 mA	Single	-40°C ~ 125°C (TJ)	Through Hole	TO-220-3 Isolated Tab	TO-220 Isolated Tab
Q6006LH4 TRIAC ALTERNISTOR 600V 6A TO220 Littelfuse Inc.	159	$0.00		Bulk	Discontinued at Digi-Key	Alternistor - Snubberless	600 V	6 A	1.3 V	80A, 85A	35 mA	35 mA	Single	-40°C ~ 125°C (TJ)	Through Hole	TO-220-3 Isolated Tab	TO-220 Isolated Tab
Q6016LH6TP TRIAC ALTERNISTOR 600V 16A TO220 Littelfuse Inc.	284	$3.21		Tube	Active	Alternistor - Snubberless	600 V	16 A	1.3 V	167A, 200A	80 mA	70 mA	Single	-40°C ~ 125°C (TJ)	Through Hole	TO-220-3 Isolated Tab	TO-220 Isolated Tab
Q8016LH6TP TRIAC ALTERNISTOR 800V 16A TO220 Littelfuse Inc.	42	$3.60		Tube	Active	Alternistor - Snubberless	800 V	16 A	1.3 V	167A, 200A	80 mA	70 mA	Single	-40°C ~ 125°C (TJ)	Through Hole	TO-220-3 Isolated Tab	TO-220AB-L
Q4025L6TP TRIAC ALTERNISTOR 400V 25A TO220 Littelfuse Inc.	136	$4.18		Tube	Active	Alternistor - Snubberless	400 V	25 A	1.3 V	208A, 250A	80 mA	100 mA	Single	-40°C ~ 125°C (TJ)	Through Hole	TO-220-3 Isolated Tab	-
Q6030LH5TP ALTNSTR 600V 30A TO220 ISO Littelfuse Inc.	66	$5.02		Tube	Active	Alternistor - Snubberless	600 V	30 A	2 V	290A, 350A	50 mA	75 mA	Single	-25°C ~ 125°C (TJ)	Through Hole	TO-220-3 Isolated Tab	TO-220-3
HQ6025KH5TP TRIAC ALTERNISTOR 600V 25A TO218 Littelfuse Inc.	25	$9.14		Tube	Active	Alternistor - Snubberless	600 V	25 A	1.3 V	250A, 300A	50 mA	80 mA	Single	-40°C ~ 150°C (TJ)	Through Hole	TO-218-3 Isolated Tab, TO-218AC	TO-218 Isolated Tab
Z0103MN0,135 TRIAC SENS GATE 600V 1A SC73 WeEn Semiconductors	328	$0.46		Tape & Reel (TR)	Active	Logic - Sensitive Gate	600 V	1 A	1.3 V	12.5A, 13.8A	3 mA	7 mA	Single	125°C (TJ)	Surface Mount	TO-261-4, TO-261AA	SC-73
Z0109MN 5AA4 TRIAC SENS GATE 600V 1A SOT223 STMicroelectronics	1,712	$0.52		Tape & Reel (TR)	Active	Logic - Sensitive Gate	600 V	1 A	1.3 V	8A, 8.5A	10 mA	10 mA	Single	-40°C ~ 125°C (TJ)	Surface Mount	TO-261-4, TO-261AA	SOT-223

About Thyristors - TRIACs

What are Thyristors - TRIACs?

Thyristors - TRIACs

Thyristors, specifically TRIACs (Triode for Alternating Current), are semiconductor devices that act as switches for controlling power. They are used to regulate the flow of electricity in AC circuits by allowing current to flow in both directions when triggered. TRIACs are composed of five layers of semiconductor material, forming two PNPN structures in parallel, which enable them to conduct current in either direction when a gate signal is applied. This bidirectional capability makes TRIACs ideal for AC applications, where they can efficiently control the power delivered to a load, such as in dimming lights or controlling motor speeds.

Types of Thyristors - TRIACs

Standard TRIACs

Standard TRIACs are the most common type, used for general-purpose applications where moderate power control is needed. They are characterized by their ability to handle moderate current and voltage levels, making them suitable for household appliances and light dimmers.

Snubberless TRIACs

Snubberless TRIACs are designed to operate without the need for external snubber circuits, which are typically used to protect the TRIAC from voltage spikes. These TRIACs are ideal for applications where space and cost constraints make the use of snubber circuits impractical, such as in compact electronic devices.

High-Temperature TRIACs

High-temperature TRIACs are engineered to operate reliably in environments with elevated temperatures. They are used in industrial applications where equipment is exposed to high heat, such as in ovens or industrial heaters.

Low-Current TRIACs

Low-current TRIACs are designed for applications requiring precise control of small currents. They are often used in signal processing and low-power control circuits, where minimal power consumption is critical.

How to choose Thyristors - TRIACs?

When selecting a TRIAC, several key parameters must be considered:

Voltage and Current Ratings: Ensure the TRIAC can handle the maximum voltage and current of your application.
Gate Trigger Current: The minimum current required to activate the TRIAC should match the control circuit's capabilities.
Thermal Management: Evaluate the TRIAC's thermal resistance and ensure adequate heat dissipation to prevent overheating.
dv/dt Rating: This parameter indicates the TRIAC's ability to withstand rapid voltage changes, which is crucial in noisy environments.
Environmental Conditions: Consider the operating temperature range and any potential exposure to moisture or dust.

To evaluate product quality and reliability, review supplier datasheets, customer reviews, and industry certifications. Installation requirements, such as mounting and cooling solutions, should also be considered to ensure optimal performance and longevity.

Applications of Thyristors - TRIACs

Consumer Electronics

In consumer electronics, TRIACs are used in light dimmers, fan speed controllers, and small appliance controls. They provide efficient power regulation, enhancing user comfort and energy savings.

Industrial Automation

TRIACs play a critical role in industrial automation systems, where they control motor speeds and manage power distribution in machinery. Their ability to handle high power levels makes them ideal for heavy-duty applications.

HVAC Systems

In HVAC systems, TRIACs are used to regulate heating and cooling elements, ensuring precise temperature control and energy efficiency. They contribute to maintaining comfortable indoor environments in residential and commercial buildings.

Lighting Systems

TRIACs are integral to modern lighting systems, providing smooth dimming capabilities and reducing energy consumption. They are used in both residential and commercial lighting applications.

Renewable Energy Systems

In renewable energy systems, such as solar inverters, TRIACs help manage the conversion of DC to AC power, ensuring efficient energy distribution and storage. They are crucial for optimizing the performance of renewable energy installations.