This is a high-quality, high-power SCR voltage regulator with stepless control, designed to adjust speed, temperature, voltage, and light intensity. It features a high-temperature resistant FR-4 circuit board, imported SCR chip, full aluminum heat sink, precision resistors, and high-voltage capacitors. Equipped with a separate switch for independent power input control, it allows easy power on/off operation. The built-in peak voltage absorption circuit ensures fast response with no delay, providing effective protection for the high-power SCR. Features: - Compact, lightweight, and portable with strong performance; easy to operate - Stepless regulation for precise control of speed, temperature, voltage, and lighting - Constructed with high-temperature resistant FR-4 PCB, imported SCR chip, full aluminum heat sink, and high-voltage rated components - Independent switch control for flexible power management - Instant response with no lag; includes peak voltage absorption circuit for SCR protection - Surge and spike protection with RC absorption and multiple safety protections - Flame-retardant insulated housing; resistant to high temperature, rust, and high pressure; durable construction - Industrial-grade multifunctional sockets with thickened copper contacts for reliable connection and safety - User-friendly mounting hole design for either flat placement or wall hanging installation - Operates silently, energy efficient, stable performance with low noise, suitable for a wide range of applications - Ideal for use with resistive loads such as electric stoves, water heaters, heat lamps, small motors, soldering irons, and similar devices Notes: - Output voltage reading without a load is inaccurate; connect a minimum 20W load for correct voltage measurement - Input is AC; output is also AC, not DC - The 4000W rating applies to resistive loads only - Inductive loads should not exceed one-third of the rated resistive load capacity - Resistive loads include incandescent lamps, heating elements, etc. Inductive loads such as series-wound motors require caution - Avoid use with sensitive electronic circuitry - This unit has a metal enclosure and must be properly grounded for safe operation Specifications: - Name: SCR Voltage Regulator - Model: NHT-4000W - Material: Aluminum - Color: Black - Input Voltage: AC 220V - Output Voltage: 0–220V - Maximum Power: 4000W - Voltage Adjustment Range: 0–220V - Rated Current: 9A - Maximum Current: 18A - Unit Size: 115 × 100 × 83mm (4.53 × 3.94 × 3.27in) - Unit Weight: 459g (1.01lb) - Package Size: 180 × 100 × 115mm (7.09 × 3.94 × 4.53in) - Package Weight: 522g (1.15lb) Package List: 1 × SCR Voltage Regulator