TRIAC-dat

TRIAC

A TRIAC is a bidirectional, three-electrode AC switch that allows electrons to flow in either direction. It is the equivalent of two SCRs connected in a reverse-parallel arrangement with gates connected to each other. A TRIAC is triggered into conduction in both directions by a gate signal like that of an SCR.

SCR

SCR stands for Silicon Controlled Rectifier. It is a three-terminal device that is used to control the flow of current.

Demo

https://t.me/electrodragon3/198

intro of triac

A TRIAC (Triode for Alternating Current) is a type of semiconductor device that is used to control the flow of electrical power. It is essentially a bidirectional thyristor, meaning it can conduct current in both directions when triggered, making it particularly useful for AC (alternating current) applications.

Key points about TRIAC:

  • Bidirectional: Unlike a regular thyristor (which only conducts in one direction), a TRIAC can control the current flow in both directions, making it ideal for AC power control.
  • Triggering: It can be triggered by a small current applied to its gate, after which it allows current to pass through it until the current drops below a certain threshold.
  • Applications: TRIACs are commonly used in light dimmers, motor speed controls, and other devices where AC power needs to be modulated.

In short, a TRIAC is a specific type of thyristor designed for efficient AC power control.

TRIAC

https://www.electrodragon.com/w/Category:TRIAC

chips

demos

thyristor = 可控硅

It is a type of semiconductor device used for controlling high-power electric signals, often in switching applications.

MOC Triac driver

Feature MOC3020 (Random-Phase) MOC3021 (Random-Phase) MOC3063 (Zero-Cross)
Triggering Behavior Random-phase (non–zero–cross); triggers at any point in AC cycle Random-phase (non–zero–cross); similar to MOC3020 but optimized for lower LED drive Zero–cross; triggers only near the AC waveform’s zero point, reducing EMI and inrush current
LED Trigger Current Typical trigger current ~30 mA Typical trigger current ~15 mA Optimized for zero–cross operation (exact value varies per datasheet)
Applications Phase–control applications (lamp dimmers, motor controls) Phase–control applications where a lower drive current is desired AC switching (solid state relays, noise reduction, on/off control)
Isolation Voltage 5,000 Vrms 5,000 Vrms 5,000 Vrms
Off-State Output Voltage Minimum 400 V Minimum 400 V Minimum 400 V
dV/dt Rating Typically ≥1000 V/µs Typically ≥1000 V/µs May be optimized for zero–cross switching (check datasheet for specifics)

Table of Contents

https://www.electrodragon.com