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

467 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	537	$0.53		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.	599	$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
2N6075BG TRIAC SENS GATE 600V 4A TO225AA Littelfuse Inc.	557	$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
2N6073BG TRIAC SENS GATE 400V 4A TO225AA Littelfuse Inc.	592	$0.95		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	389	$1.98	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	602	$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
Z0103MN0,135 TRIAC SENS GATE 600V 1A SC73 WeEn Semiconductors	153	$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	902	$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
ACS102-6T1-TR TRIAC ALTERNISTOR 600V 0.2A 8SO STMicroelectronics	477	$0.62	ACS™	Tape & Reel (TR)	Active	Alternistor - Snubberless	600 V	200 mA	900 mV	7.3A, 7.6A	5 mA	20 mA	Single	-30°C ~ 125°C (TJ)	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOIC
BTA204S-600D,118 TRIAC SENS GATE 600V 4A DPAK WeEn Semiconductors	1,088	$0.69		Tape & Reel (TR)	Active	Logic - Sensitive Gate	600 V	4 A	1.5 V	25A, 27A	5 mA	6 mA	Single	125°C (TJ)	Surface Mount	TO-252-3, DPak (2 Leads + Tab), SC-63	DPAK
Z0103MA,126 TRIAC SENS GATE 600V 1A TO92-3 WeEn Semiconductors	448	$0.00		Cut Tape (CT)	Active	Logic - Sensitive Gate	600 V	1 A	1 V	8A, 8.5A	5 mA	7 mA	Single	125°C (TJ)	Through Hole	TO-226-3, TO-92-3 (TO-226AA) Formed Leads	TO-92-3
Z0103MA,116 TRIAC SENS GATE 600V 1A TO92-3 WeEn Semiconductors	381	$0.00		Tape & Reel (TR)	Active	Logic - Sensitive Gate	600 V	1 A	1.3 V	8A, 8.5A	3 mA	7 mA	Single	125°C (TJ)	Through Hole	TO-226-3, TO-92-3 (TO-226AA) Formed Leads	TO-92-3
Z0103MA,412 TRIAC SENS GATE 600V 1A TO92-3 WeEn Semiconductors	112	$0.00		Bulk	Active	Logic - Sensitive Gate	600 V	1 A	1.3 V	8A, 8.5A	3 mA	7 mA	Single	125°C (TJ)	Through Hole	TO-226-3, TO-92-3 (TO-226AA) Formed Leads	TO-92-3
BT131-600,412 TRIAC SENS GATE 600V 1A TO92-3 WeEn Semiconductors	406	$0.45		Bulk	Active	Logic - Sensitive Gate	600 V	1 A	1.5 V	12.5A, 13.8A	3 mA	5 mA	Single	125°C (TJ)	Through Hole	TO-226-3, TO-92-3 (TO-226AA) Formed Leads	TO-92-3
Z0110MN 5AA4 TRIAC 600V 1A SOT223 STMicroelectronics	500	$1.02		Tape & Reel (TR)	Active	Standard	600 V	1 A	1.3 V	8A, 8.5A	25 mA	25 mA	Single	-40°C ~ 125°C (TJ)	Surface Mount	TO-261-4, TO-261AA	SOT-223
MAC4DSMT4G TRIAC SENS GATE 600V 4A DPAK Littelfuse Inc.	1,213	$0.80		Tape & Reel (TR)	Active	Logic - Sensitive Gate	600 V	4 A	1.3 V	40A @ 60Hz	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)
BT137-600E,127 TRIAC SENS GATE 600V 8A TO220AB WeEn Semiconductors	1,230	$0.72		Tube	Active	Logic - Sensitive Gate	600 V	8 A	1.5 V	65A, 71A	10 mA	20 mA	Single	125°C (TJ)	Through Hole	TO-220-3	TO-220AB
BT137-800E,127 TRIAC SENS GATE 800V 8A TO220AB WeEn Semiconductors	591	$0.76		Tube	Active	Logic - Sensitive Gate	800 V	8 A	1.5 V	65A, 71A	10 mA	20 mA	Single	125°C (TJ)	Through Hole	TO-220-3	TO-220AB
BTA208-600E,127 TRIAC SENS GATE 600V 8A TO220AB WeEn Semiconductors	1,024	$0.86		Tube	Active	Logic - Sensitive Gate	600 V	8 A	1.5 V	65A, 72A	10 mA	25 mA	Single	125°C (TJ)	Through Hole	TO-220-3	TO-220AB
BT138-600,127 TRIAC 600V 12A TO220AB WeEn Semiconductors	823	$0.95		Tube	Active	Standard	600 V	12 A	1.5 V	95A, 105A	35 mA	30 mA	Single	125°C (TJ)	Through Hole	TO-220-3	TO-220AB

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.