The BT136 is a widely used TRIAC (Triode for Alternating Current) semiconductor device designed for controlling AC (alternating current) power. It is commonly employed in applications such as light dimming, motor speed control, and various AC switching tasks. This device is notable for its ability to conduct current in both directions when triggered, making it versatile for AC applications.

Key Features and Specifications

• Maximum On-State RMS Current (I_T(RMS)): 4A
• Repetitive Peak Off-State Voltage (V_DRM): 600V
• Gate Trigger Current (I_GT): 10mA
• Gate Trigger Voltage (V_GT): 1.5V
• Holding Current (I_H): 15mA
• Package Type: TO-220AB

These specifications indicate that the BT136 can handle a continuous current of up to 4 amperes and block voltages up to 600 volts when in the off state. The relatively low gate trigger current and voltage make it suitable for interfacing with digital control circuits, including microcontrollers and other logic devices.

Pin Configuration

The BT136 features three pins:

1. Main Terminal 1 (MT1): Connected to one end of the AC load or supply.
2. Main Terminal 2 (MT2): Connected to the other end of the AC load or supply.
3. Gate (G): Receives the trigger signal to activate the TRIAC.

The device is typically housed in a TO-220 package, which provides efficient heat dissipation and ease of mounting.

Applications

Due to its bidirectional conduction and control capabilities, the BT136 is utilized in various AC power control applications, including:

• Light Dimmers: Adjusting the brightness of incandescent and some types of LED lamps.
• Motor Speed Controllers: Regulating the speed of AC motors in fans, drills, and other appliances.
• Heater Controls: Managing the power delivered to heating elements.
• AC Static Switching: Serving as an electronic switch for AC loads.

Its ability to be directly triggered by low-power gate signals makes it compatible with microcontroller-based control systems, facilitating automation and remote control applications.