Features: The 40A SCR Solid states relays ensures stable temperature control during prolonged welding operations, solving overheating issues in traditional relays for industrial spots welding tasks. Engineered with PCD metal composite, this welding machine control board delivers enhances conductivity and extended service life compared to standard materials. Ideal for electronics manufacturers and industrial technicians requiring precisions welding with minimal defects in high frequency production environment. for multiple spots welders models, it integrates seamlessly into multiple device workshops without adjustments, streamlining equipment compatibility challenges. Builts in overload protections safeguards circuitry while maintaining precisions current regulation, prioritizing safety in demanding professional welding applications. Specifications: Materials: PCD+metal Size: 7.7x5.4cm Package Includes: 1PC spots Welding Machine Control Board note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.