Light Dimmers: Triacs are commonly used in light dimmer circuits for controlling the brightness of incandescent lamps. By adjusting the firing angle of the Triac, the amount of power delivered to the lamp can be varied, thus controlling its brightness.

Motor Speed Control: Triacs can be employed in motor speed control circuits, particularly for universal motors used in appliances like blenders, mixers, and power tools. By adjusting the firing angle, the speed of the motor can be controlled.

Heating Control: Triacs are used in heating control circuits for appliances like electric stoves and ovens. They can regulate the amount of power delivered to the heating element, controlling the temperature.

Fan Speed Control: Triacs can be used in fan speed control circuits for appliances like ceiling fans. By adjusting the firing angle, the speed of the fan can be controlled.

AC Power Switching: Triacs are often used as AC power switches in various applications. They can control the power supplied to devices such as coffee makers, toasters, and other household appliances.

AC Power Control in Industrial Applications: Triacs find applications in industrial settings for controlling power to different types of equipment, including heaters, motors, and lighting.

Voltage Regulation: Triacs can be used in voltage regulation circuits, where the output voltage is controlled by adjusting the firing angle of the Triac.

Lighting Control Systems: Triacs are a key component in lighting control systems, such as those used in theaters, auditoriums, and smart home lighting systems.

Power Supplies: In some power supply applications, especially those involving resistive loads, Triacs can be used for switching and controlling the output power.

Electronic Fan Regulators: Triacs are used in electronic fan regulators to control the speed of ceiling and exhaust fans.