4000W Electronic Starter Speed Controller (AC 110V / 220V) — SCR Adjustable Control Key benefits - Precise power and speed control: SCR-based adjustable control provides fine, repeatable adjustment of AC voltage for smoother motor starts, controlled acceleration, and accurate speed or power tuning. - Wide compatibility: Works with standard AC 110V and 220V supplies and is rated for up to 4000W, making it suitable for a broad range of equipment that requires variable AC voltage or dimming. - Reliable thermal management: Built-in thermostat monitors operating temperature and a built-in fan provides active cooling to prevent overheating and maintain stable performance under load. - Multi-function: Acts as a dimmer and voltage regulator as well as a starter/speed controller, consolidating functions that otherwise require multiple devices. What it does and why you need it - Controls AC voltage to adjust motor speed or element power without mechanical gear changes or manual resistor packs, reducing wear and simplifying setup. - Allows gradual startups and precise adjustments to match process requirements, reducing shock to equipment and improving operational consistency. - Keeps the controller within safe operating temperatures using integrated thermal control and forced-air cooling, improving reliability in continuous or heavy-duty use. Key attributes - Power rating: 4000W maximum handling. - Voltage compatibility: AC 110V and AC 220V operation. - Control technology: Silicon Controlled Rectifier (SCR) for stable, adjustable control of AC power. - Thermal protection: Thermostat included to maintain stable operating conditions. - Cooling: Built-in fan for effective heat dissipation under load. Typical applications - Workshop motor control: Smoothly adjust speed of AC-powered tools (e.g., grinders, saws, small lathes) that accept phase-fired voltage control for better process control and reduced mechanical stress. - Heating and lighting control: Use as a dimmer/voltage regulator for resistive heating elements or lighting circuits where variable power is required. - Process and machine control: Regulate speed or torque for conveyors, belt drives, or fans where voltage-based control is appropriate. Practical notes - Designed to be integrated into systems that require adjustable AC voltage control; follow local electrical codes and use appropriate fusing and wiring rated for the device’s voltage and wattage. - Thermostat and fan improve longevity and performance but ensure adequate ventilation and proper mounting for reliable operation. This 4000W electronic starter speed controller delivers adjustable SCR-based control, broad AC 110V/220V compatibility, built-in thermal protection, and active cooling—suitable for applications that need precise voltage, dimming, or speed regulation.