意法半导体的产品包括采用电流范围1~50 A的三端双向可控硅(Triac)的中等功率交流负载,电压范围为600~800V,某些工业器件的电压可达1200 V。 

由于可驱动电压范围为120~500 V的交流负载,受益于意法半导体的三端双向可控硅元件的电路包括调光器、所有类型交流电源通断开关、家用或办公用复印/打印设备、工业电机起动器或SSR、园艺工具、自动灌溉系统,以及面向工厂、楼宇和住宅的各种自动化控制器。

  • 高压triac专门用于工业和三相电源开关应用。
  • 我们的8T triac设计用于确保需要优化空间电路中的高开关性能,是EMI约束较高应用的理想选择,而6H triac8H triac则适用于散热限制较高的应用
  • 我们的标准triac与snubberless™ triac拥有全面的栅极驱动可能性和封装,涵盖所有电源开/关和相位角切换需求。
  • 我们的ACS™ AC开关具有过压保护功能和适用于家用电器和灌溉设备(包括电磁执行器和泵)的高电感负载开关功能,而我们的ACST triac专为全天候运行设备中的更高负载而设计。


Ease your transition to surface-mount Triacs with our extended D²PAK portfolio

ST further extends its D²PAK offer for Triacs, ideal for compact designs. With parts ranging from 8 to 30 A, this Triac D²PAK offer is particularly suited for home and factory automation, allowing innovative designs with isolated metal substrate (IMS) and direct-bonded copper boards.

Discover our  High-temperature Triacs and  Standard and Snubberless Triacs in D²PAK.

800 V T-series triacs outrun competition for load control

800 V T-series high-performance triacs are designed for AC loads in industrial control and home appliances, enabling innovative and safe AC load control. With immunity (dV/dt) up to twice as high and commutation capability (dI/dt)c up to 5 times as good as state-of-art Triacs, this high-performance 800 V T-series triacs enables circuits to be more robust to EMI and loads to be fully controlled, with no disturbances. Its low gate current down to 10 mA helps optimize the power supply and allows direct drive capability through a single resistance between the microcontroller and Triac. 800 V T-series triacs are housed in TO-220AB, TO-220FPAB and now in D2PAK.



eDesignSuite is a comprehensive set of easy-to-use design-aid utilities ready to help you streamline the system development process with a wide range of ST products.

Thermal-electrical Simulators for Components

Choose design tool:

AC Switches Simulator

Select ratings and application waveforms
Get junction temperature and blocking voltage graphs
Search and sort suitable devices

Rectifier Diodes Simulator

Select ratings and application waveforms
Estimate power losses
Search and sort suitable devices


Supports long mission profiles
Provides power loss and temperature graphs
Helps define heatsink thermal properties

Twister Sim

Help select the right ViPOWER Automotive power device
Supports load-compatibility, wiring harness optimization, fault condition impact and diagnostic analysis
Supports various PCB configurations

TVS Simulator

Specify system ratings and surge waveform
Search and sort suitable devices