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Triac

Thanks to their bidirectional structure, Triacs are useful in controlling full-wave AC applications. They can be used as an ON/OFF switch, replacing efficiently electro-mechanical relays (providing high degree of flexibility through electronic control, and superior reliability).

They are also capable to control power level through AC loads, thanks to a simple phase control circuit.
Available in general purpose standard configurations, high commutation performance series with ST Snubberless™ Technology, or high temperature versions for use in harsh environment, they fit any AC applications requiring precise control.

 
Triac 200x150
 
Triac
Snubberless High Tj Triacs
Standard and Snubberless Triacs
 
New Products
Txx35H and Txx50H: High temperature 8 A to 20 A TRIACs providing 150° C maximal operating junction temperature
 
Related Information
Application Notes
AN302 - Thyristors and Triacs, an important parameter: the Holding Current (PDF 64K)
AN303 - Latching current (PDF 97K)
AN307 - Use of TRIACS on inductive loads (PDF 56K)
AN308 - Control by a TRIAC for an inductive load how to select a suitable circuit (PDF 177K)
AN416 - Sensorless Motor Drive with the ST62 MCU + TRIAC (PDF 239K)
AN436 - TRIAC control by pulse transformer (PDF 65K)
AN437 - TRIACS: is the Snubber circuit necessary? (PDF 123K)
AN439 - Improvement in the TRIAC communication (PDF 460K)
AN440 - QII and QIII TRIAC triggering with positive power supply (PDF 98K)
AN441 - TRIAC for microwave oven (PDF 326K)
AN533 - SCRs, TRIACs, and AC switches, thermal management precautions for handling and mounting (PDF 229K)
AN1353 - ASD ST62000C software description for cooling thermostat applicatons (PDF 137K)
AN1966 - Protect your TRIACS (PDF 179K)
AN2263 - Universal motor speed control and light dimmer with TRIAC and ST7LITE microcontroller (PDF 1781K)
AN2425 - ST7ULTRALITE Microcontroller Drives a TRIAC or AC Switch on the MAINS
AN2446 - STEVAL-IHT002V1 Intelligent thermostat for compressor based on ST7Ultralite MCU (PDF 230K)
AN2703 - Parameter list for SCRs, TRIACs, AC switches, and DIACS (PDF 99K)
Product Focus
High Tj TRIACs: New high-performance 150 °C junction temperature TRIAC series
BTB04-600SL: Standard Triac 4Amp in TO-220