Item Type: AC Voltage Regulator Material: Cold rolled steel, aluminum alloy, thyristor, PCB Uses: High-power thyristor voltage regulation, speed regulation, temperature regulation, and dimming applications. Household appliances, industrial electrical appliances, scientific test equipment, electrical equipment for factories, schools, etc. ItemParameter Output voltage0-220V adjustable (Voltmeter does not work when the output voltage is lower than 5V) Limit power4000W (adapt to 2000W-3000W resistive load) Regulating range0-220V steplessly adjustable (under load condition) step-down to 0V, step-up 10V Rated current9A Limit current18A Overload protection switchYes Thyristor modelSTMicroelectronics, Thyristor: BTA41-600B/800B Size: Approx. 5.3cm / 2.1in 10cm / 3.9in 8.4cm / 3.3in Precautions and Instructions for Use: 1. When the machine is empty, the measured output voltage is a virtual voltage, and a load above 20W must be connected to measure the correct output voltage 2. Input AC power, the output is also AC, not DC. 3. The 4000W mentioned above refers to the limit power when working in a resistive load. The inductive load is 1/3 of the resistive load. The resistive load refers to the tungsten filament lamp, heating wire, etc., and the inductive load refers to the series motor. And so on, there are circuit board electronic products used with caution. 4. The metal shell of this product must be safely grounded 1With a peak voltage absorption circuit, it effectively protects the high?power SCR anti?surge, anti?spike, RC absorption multiple protection. 2Original imported chip SCR, all?aluminum heat sink, high?temperature circuit board. 3Built?in accurate resistance, high voltage capacitor, stable output, no lag and delay. 4Use multifunctional industrial sockets, thick copper parts, thicker parts inside the copper parts, high current, good contact and safety. 5The metal casing has the characteristics of high temperature flame retardant, no deformation and no rust, which can effectively prevent high temperature, heavy pressure. 6With stepless variable speed adjustment, free control adjustment, no gear limit.1 x AC Voltage Regulator