BT136 TRIAC (TO-220 Package)

The BT136 TRIAC is a bidirectional thyristor designed for AC power switching and control applications. It can control current flow in both directions, making it ideal for light dimmers, fan speed controllers, motor control, AC switching, heating control, and home automation systems. The BT136 is commonly used with optocouplers such as the MOC3021 or MOC3063 for safe microcontroller interfacing.

Features

• Full Name: BT136 Sensitive Gate TRIAC
• Bidirectional AC switching
• High current handling capability
• Sensitive gate trigger
• Suitable for AC load control
• Low on-state voltage drop
• High surge current capability
• TO-220 package for easy mounting
• Compatible with optocoupler driver circuits
• Reliable and durable performance

Specifications

Pin Configuration

When viewed from the front (text facing you, pins downward):

Note: The metal tab is internally connected to MT2.

Applications / Uses

• AC light dimmers
• Fan speed controllers
• AC motor control
• Heater temperature controllers
• Solid-state relays
• Home automation systems
• Arduino AC switching projects
• Industrial control equipment
• Appliance control circuits
• DIY electronics projects

Advantages

• Controls AC current in both directions
• Sensitive gate for easy triggering
• Compact TO-220 package
• High reliability
• Suitable for inductive and resistive loads
• Easy integration with optocouplers
• Cost-effective AC switching solution

Size

• Package Type: TO-220
• Body Width: Approx. 10 mm
• Body Height: Approx. 15 mm
• Overall Height (with leads): Approx. 30 mm
• Lead Pitch: 2.54 mm
• Weight: Approximately 2 g

Package Includes

• 1 × BT136 TRIAC (TO-220)

Note: The BT136 is intended for AC applications only. For safe operation with mains voltage (110V/230V AC), use proper isolation techniques such as an optocoupler (e.g., MOC3021 or MOC3063) and follow appropriate electrical safety practices. A heat sink may be required when switching high-current loads continuously.