4000W AC SCR Voltage Regulator Dimmer & Motor Speed Controller

$124.53 $167.47

4000W AC SCR Voltage Regulator – Dimmer, Speed & Temperature Controller (6-Pack)

Take precise control of your electrical appliances with this heavy-duty 4000W AC SCR Voltage Regulator. Engineered with a bidirectional high-power thyristor rated up to 40 amps, this controller delivers smooth, stepless adjustment for electric furnaces, water heaters, lamp dimmers, small motors, and electric irons — all from a single compact unit. This listing includes a convenient 6-pack set, ideal for workshops, small factories, or multi-station setups.

Made in Mainland China.

Key Features

High-Power Thyristor Design: Handles up to 40A current, eliminating over-current issues caused by low-resistance furnace wire under cooling conditions.
0–100% Voltage Adjustment: 100-level non-linear adjustment across AC 220V — fine-tune output for dimming lights, regulating temperature, or controlling motor speed with ease.
Wide Application Range: Suitable for electric furnaces, water heaters, lamp dimmers, small electric motors, and electric irons. Ideal for appliances up to 4000W (recommended continuous use up to 2000W at room temperature).
Plug-and-Play Ready: No additional components required — the bidirectional thyristor is built in and ready to use straight out of the box.
Built-In Heat Sink: Comes with an integrated heat sink for improved thermal management during extended operation.
Includes Switch Panel & Cable: Each unit ships with a switch panel and cable for quick, straightforward installation.

Specifications

Input Voltage	AC 220V
Maximum Power	4000W (resistive load limit); recommended ≤2000W continuous at room temperature
Current Rating	Up to 40A
Voltage Adjustment Range	0–100% (100 levels, non-linear)
EU LVD Voltage Class	High Voltage: Above 50V AC or 75V DC
Materials	PCB + Metal + Electronic Accessories
Wireless	No
Battery Required	No

Package Contents (×6 Sets)

6 × 4000W SCR Voltage Regulator
6 × Switch Panel
6 × Cable

Note: Due to lighting and display variation, product color may appear slightly different from images. Measurement tolerance: ±1–3 cm.

Frequently Asked Questions

Q: What types of appliances can the 4000W SCR Voltage Regulator control?

A: This SCR voltage regulator is compatible with a wide range of resistive and inductive loads including electric furnaces, water heaters, incandescent lamp dimmers, small AC motors, and electric irons. It is best suited for appliances operating on AC 220V with a load up to 4000W, though continuous long-term use is recommended at or below 2000W for optimal performance and longevity.

Q: Do I need to add extra components to use this voltage regulator?

A: No additional components are required. The bidirectional high-power thyristor is already built into the unit. Each set includes the SCR voltage regulator module, a switch panel, and a cable — everything you need for a straightforward installation.

Q: Why is there a recommended continuous wattage lower than the maximum rating?

A: The 4000W rating represents the maximum resistive load limit under ideal conditions. For sustained, long-duration operation at typical room temperatures, staying at or below 2000W helps prevent thermal buildup and extends the life of the controller. The integrated heat sink assists with thermal management, but reducing the continuous load adds an extra layer of protection for prolonged use.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.