This is a high-quality, high-power SCR voltage regulator with stepless regulation for adjusting speed, temperature, voltage, and light. 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 control, it allows independent control of input power and easy power cutoff. With no delay or lag, it includes a peak voltage absorption circuit to effectively protect the high-power SCR. Features: - Compact size, lightweight, powerful, and easy to use - Stepless regulation for speed, temperature, voltage, and lighting control - Built with high-temperature resistant FR-4 PCB, imported SCR chip, full aluminum heat sink, precision components, and high-voltage capacitor - Independent switch for input power control and power disconnection - Instant response with peak voltage absorption circuit for SCR protection - Surge and spike protection, RC absorption, and multiple safety protections - Flame-retardant insulated housing, heat resistant, rustproof, pressure resistant, and durable - Industrial-grade sockets with thickened copper contacts for reliable connection and safety - User-friendly mounting hole design for flat placement or wall hanging - Silent operation, energy efficient, noise resistant, and suitable for a wide range of applications - Ideal for use with electric stoves, water heaters, heat lamps, small motors, soldering irons, and similar electrical components Notes: - Output voltage measurement without load results in a false reading; connect a minimum 20W load for accurate measurement - Input is AC power, output is also AC, not DC - The 4000W rating applies to resistive loads only - Inductive loads should not exceed one-third of the resistive load capacity - Use caution with inductive or electronic loads such as motors or circuit boards - This product has a metal casing and must be properly grounded for safety 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 x 100 x 83mm (4.53 x 3.94 x 3.27in) - Unit Weight: 459g (1.01lb) - Package Size: 180 x 100 x 115mm (7.09 x 3.94 x 4.53in) - Package Weight: 522g (1.15lb) Package List: 1 x SCR Voltage Regulator