SCR-A Single Phase Thyristor Trigger Board – Voltage Speed Control
SCR-A Single Phase Thyristor Trigger Board – Voltage Speed Control
Single Phase SCR-A Phase-Shifting Thyristor Trigger Board
Take precise control of voltage, temperature, and motor speed with this compact Single Phase SCR-A Thyristor Trigger Board. Designed for industrial and DIY electronics applications, this phase-shifting trigger circuit board delivers reliable thyristor control in a small, easy-to-integrate package — measuring just 4.8 × 5.5 cm. Whether you're building a custom dimmer, regulating heater output, or managing motor speed, this board is a versatile and dependable solution.
Key Features
- High Current Capacity: Controls thyristors with a maximum current of less than 150 A — suitable for a wide range of power control applications.
- Wide Voltage Compatibility: Works with 220V single-phase power supply; also compatible with 100–400VAC in 380V dual-wire circuits.
- Multiple Control Signal Inputs: Supports DC 4–20 mA, DC 1–5 V, and 10K potentiometer inputs for flexible integration into your control system.
- Universal Frequency Support: Compatible with both 50 Hz and 60 Hz power systems — works worldwide.
- Compact & Robust Build: Made from ABS plastic in a clean blue finish; compact 4.8 × 5.5 cm footprint fits easily into enclosures and control panels.
- Phase-Shifting Trigger Technology: Enables smooth, stepless control of AC power output for precise voltage, temperature, and speed regulation.
Specifications
| Model | SCR-A |
| Material | ABS Plastic |
| Color | Blue |
| Dimensions | 4.8 × 5.5 cm |
| Max Thyristor Current | < 150 A |
| Voltage Range | 100–400 VAC |
| Control Signal Input | DC 4–20 mA / DC 1–5 V / 10K Potentiometer |
| Frequency | 50–60 Hz |
| Country of Origin | Made in Mainland China |
Package Contents
- 1 × SCR-A Single Phase Thyristor Trigger Circuit Board
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Frequently Asked Questions
Q: What is the SCR-A thyristor trigger board used for?
A: The SCR-A single phase thyristor trigger board is used for phase-shifting control of AC power. It enables precise regulation of voltage output, motor speed, and temperature in industrial and DIY circuits by controlling the firing angle of thyristors (SCRs) rated up to 150 A.
Q: What voltage and frequency systems is this trigger board compatible with?
A: This board is compatible with 220V single-phase AC supplies and works across a 100–400 VAC range in 380V dual-wire configurations. It supports both 50 Hz and 60 Hz frequencies, making it suitable for use in most countries worldwide.
Q: What control signal inputs does the SCR-A board support?
A: The board accepts three types of control signal inputs: DC 4–20 mA current loop, DC 1–5 V voltage signal, and a 10K potentiometer. This flexibility allows easy integration with PLCs, microcontrollers, manual controls, and other automation systems.
Q: Is any additional hardware needed to use this trigger board?
A: Yes, this is a trigger/control board only — you will need to pair it with an appropriate external SCR thyristor module rated for your load current (up to 150 A max). Ensure your enclosure, wiring, and heat dissipation are sized properly for your application.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.