40A Thyristor Solid State Relay Spot Welder Control Board
40A Thyristor Solid State Relay Spot Welder Control Board
40A Thyristor Solid State Relay Control Module for Spot Welding Machines
Upgrade your spot welding setup with this precision-engineered 40A Thyristor Solid State Relay Control Board. Designed for DIY enthusiasts, hobbyists, and professional technicians alike, this compact module delivers stable, adjustable output for consistent and efficient welding results every time. Made in Mainland China.
Key Features
- Built-in 40A Thyristor: Provides stable output and highly efficient welding performance.
- Single Spot Welding Protection: Engineered to prevent repeated triggering, ensuring safe and standardized operation with every use.
- Dual-Knob Control: Simple and intuitive — the left knob adjusts weld time and the right knob adjusts current power level.
- LED Status Indicator: Built-in welding LED indicator light lets you monitor working status at a glance.
- High-Quality Components: Premium-grade parts ensure long-lasting, stable board performance even under demanding conditions.
Technical Specifications
| Power Supply Voltage | 9–12V DC |
| Thyristor Rating | 40A |
| Time Control Range | 0.02 – 1 Second |
| Power Control Range | 40% – 99% |
| EU LVD Voltage | Low Voltage: Below 50V AC or 75V DC |
| Country of Origin | Made in Mainland China |
What's in the Box?
- 1× Spot Welding Machine Control Board (40A Thyristor Solid State Relay Module)
Important Notes
- Colors may appear slightly different from product images due to lighting and monitor variations.
- Please allow 1mm–1cm differences due to manual measurement.
Safety & Electrical Standards
For guidance on electrical component safety and best practices when working with low-voltage control modules, refer to the OSHA Electrical Safety Guidelines. Always follow proper safety procedures when assembling or operating electrical welding equipment.
Frequently Asked Questions
Q: What power supply does this 40A thyristor spot welding control board require?
A: This solid state relay control module requires a DC power supply voltage of 9–12V. Make sure your power source falls within this range for safe and stable operation of the control board.
Q: Can I adjust both the weld time and current power independently on this control board?
A: Yes! The board features two independent knobs — the left knob controls weld time (adjustable from 0.02 to 1 second) and the right knob controls output power level (adjustable from 40% to 99%), giving you precise control over every weld.
Q: Is this control module compatible with most DIY spot welding machines?
A: This 40A thyristor solid state relay module is designed as a universal control board for spot welding machines. It is well-suited for DIY builds and replacement applications. Always verify that your machine's voltage and current specifications are compatible before installation.