BTA08 Triac Thyristor – 8A 600V
BTA08 Triac Thyristor – 8A 600V Bidirectional Switching Device
Overview:
The BTA08 is a high-performance Triac thyristor, ideal for general-purpose AC switching and phase control applications. With a current rating of 8 Amps and a voltage rating of up to 600V, this component is widely used in lamp dimmers, motor speed controllers, fan regulators, and other AC load switching circuits. The insulated tab version enhances safety and thermal performance.
Key Features:
Bidirectional AC switch – conducts in both directions
High surge capability – robust and reliable for AC loads
Insulated tab – simplifies mounting and isolation
Snubberless design – compatible with inductive loads
Low gate trigger current
Technical Specifications:
| Parameter | Value |
|---|---|
| Model | BTA08-600 (or BTA08-600B/C) |
| Repetitive Peak Voltage | 600V |
| RMS On-State Current | 8A |
| Surge Current (1 cycle) | 80A |
| Gate Trigger Voltage | 1.3V typical |
| Gate Trigger Current | 5mA typical |
| Holding Current | 10mA typical |
| Package Type | TO-220 |
| Insulation Voltage | 2500V RMS (with insulated tab) |
Applications:
AC motor speed control
Light dimmers
Fan regulators
Heating elements
Solid-state relays
Inductive and resistive AC load switching
Typical Circuit Example:
A common use for the BTA08 is in phase-angle dimming control using an opto-isolated gate trigger like the MOC3021 and a zero-cross detector for smooth AC switching.
Resources:
📹 Video Tutorial – How a Triac Works: https://youtu.be/q8q-tvkvTGc?si=GI9Smu9yR5RwOrcv