---
product_id: 638393870
title: "4000W AC Variable Speed Controller"
brand: "sdrgeek"
price: "SAR 223"
currency: SAR
in_stock: true
reviews_count: 8
category: "Sdrgeek"
url: https://www.desertcart.com.sa/products/638393870-4000w-ac-variable-speed-controller
store_origin: SA
region: Saudi Arabia
---

# 15A max current 4000W max resistive load 0-220V adjustable output 4000W AC Variable Speed Controller

**Brand:** sdrgeek
**Price:** SAR 223
**Availability:** ✅ In Stock

## Summary

> ⚙️ Master your power, control your flow — voltage on your terms!

## Quick Answers

- **What is this?** 4000W AC Variable Speed Controller by sdrgeek
- **How much does it cost?** SAR 223 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.sa](https://www.desertcart.com.sa/products/638393870-4000w-ac-variable-speed-controller)

## Best For

- sdrgeek enthusiasts

## Why This Product

- Trusted sdrgeek brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Robust Power Handling:** Supports up to 15A current and 4000W resistive load—built for serious performance.
- • **Precision Voltage Control:** Fine-tune your devices with a smooth 0-220V output range for ultimate customization.
- • **Industrial-Grade Durability:** Crafted with high-quality SMD thyristors and all-aluminum heat sinks for reliable heat dissipation.
- • **Comprehensive Safety Features:** Zero hysteresis, peak absorption circuit, and reinforced copper layers ensure maximum protection.
- • **Versatile Appliance Compatibility:** Perfect for fans, routers, heaters, and motors—empower your workspace with flexible speed control.

## Overview

The SDRGEEK AC Variable Speed Controller is a heavy-duty 120V-220V SCR voltage regulator designed for precise speed and power control of resistive and inductive loads up to 4000W. Featuring advanced heat-resistant materials, zero-delay protection circuits, and versatile compatibility with fans, motors, and heaters, it delivers industrial-grade reliability and safety for professional and DIY applications.

## Description

AC Variable Speed Controller, 120V~220V 15A 4000W SCR Voltage Controller for Router Fan Electric Motor Rheostat - desertcart.com

Review: Excellent Variac Controller - Bought this for use with a 240v griddle from the EU. The griddle has no temp control and 220v was too hot. Using this controller, we were able to adjust the voltage and thus the griddle temperature to just the right degree, which is about 185v for our task. I wasn't sure if this would work, but it works very well.
Review: Great fan speed controller - I have two Westinghouse table fans from the 1950s. They move a lot of air but they tend to be a bit noisy. When I want a lot of moving air or I want white noise for a sleep, those fans are great. For TV I want much less airflow and much less noise. This controller works perfectly to slow the fan, reduce the air and cut the noise dramatically. I can use the ON/OFF switch without changing the speed setting and the fan returns to the preset speed from the night before. That's just what I wanted. The watt meter on the controller does not show what wattage of this fan. I don't know why and I really don't care. The controller does what I want it to do.

## Features

- 【Powerful Functions】Compatible with 120V/220V power input, the maximum current is 15A, the output voltage is adjustable from 0-220V, and the limit power is 400W. 4000W is the maximum power when working under a resistive load, and the inductive load is 1/3 of the resistive load.
- 【High-quality Materials】 imported high-quality SMD thyristors, all-aluminum heat sinks are suitable for high-temperature circuits, FR-4 circuit boards are heat-resistant and durable, and double-sided copper layer welding increases safety. Note: The product is a metal case and must be grounded safely!
- 【Safe and Reliable】 With zero hysteresis and zero delay, it has a peak absorption circuit, which can effectively protect the high power thyristor from sweat, spikes and RC absorption. It is also equipped with multifunctional industrial sockets and thickened phosphor bronze fittings. Multiple layers of fortification give you comprehensive security protect.
- 【Applicable Appliances】 Our AC motor speed controllers can be widely used in fans, electric stoves, water heaters, small motors, electric irons, tungsten lamps and other electrical appliances. At present, most motors do not support voltage regulation (such as single-phase motors, asynchronous motors, dual-value capacitor motors, etc.), and are not suitable for smart home appliances with complex circuit boards.
- 【Please Note】 Not suitable for smart appliances with complex circuit boards. The maximum power of connecting inductive loads (such as fans and routers) is about 1500W, and the limit power of connecting resistive loads (such as electric furnaces and heating wires) is 4000W. Resistive loads refer to tungsten lamps, heating wires, etc., and inductive loads refer to series-excited motors.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0C2VLSVR5 |
| Best Sellers Rank | #325,917 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #237 in Electrical Motor Controls |
| Brand | SDRGEEK |
| Brand Name | SDRGEEK |
| Color | Black |
| Customer Reviews | 3.9 out of 5 stars 131 Reviews |
| Display Type | LCD or LED |
| Included Components | controller |
| Item Dimensions L x W x H | 4.49"L x 3.94"W x 3.15"H |
| Item Weight | 1.1 pounds |
| Manufacturer | SDRGEEK |
| Material | Metal |
| Material Type | Metal |
| Model | SD-4000W-01 |
| Number of Items | 1 |
| Part Number | SD-4000W-01 |
| Product Dimensions | 4.49"L x 3.94"W x 3.15"H |
| Unit Count | 1 Count |

## Product Details

- **Brand:** SDRGEEK
- **Color:** Black
- **Item Weight:** 1.1 Pounds
- **Material:** Metal
- **Product Dimensions:** 4.49"L x 3.94"W x 3.15"H

## Images

![4000W AC Variable Speed Controller - Image 1](https://m.media-amazon.com/images/I/71Bx6q70yBL.jpg)
![4000W AC Variable Speed Controller - Image 2](https://m.media-amazon.com/images/I/71OEWrZ2E9L.jpg)
![4000W AC Variable Speed Controller - Image 3](https://m.media-amazon.com/images/I/710-OKUoDNL.jpg)
![4000W AC Variable Speed Controller - Image 4](https://m.media-amazon.com/images/I/71otU-EjseL.jpg)
![4000W AC Variable Speed Controller - Image 5](https://m.media-amazon.com/images/I/71-78CkEYoL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent Variac Controller
*by C***R on February 18, 2025*

Bought this for use with a 240v griddle from the EU. The griddle has no temp control and 220v was too hot. Using this controller, we were able to adjust the voltage and thus the griddle temperature to just the right degree, which is about 185v for our task. I wasn't sure if this would work, but it works very well.

### ⭐⭐⭐⭐⭐ Great fan speed controller
*by B***T on July 9, 2024*

I have two Westinghouse table fans from the 1950s. They move a lot of air but they tend to be a bit noisy. When I want a lot of moving air or I want white noise for a sleep, those fans are great. For TV I want much less airflow and much less noise. This controller works perfectly to slow the fan, reduce the air and cut the noise dramatically. I can use the ON/OFF switch without changing the speed setting and the fan returns to the preset speed from the night before. That's just what I wanted. The watt meter on the controller does not show what wattage of this fan. I don't know why and I really don't care. The controller does what I want it to do.

### ⭐⭐⭐⭐ Works With my Bench Grinder
*by D***R on February 3, 2025*

I suppose that just purchasing a variable speed bench grinder in the first place is the better option. However, since mine is set up with the wheels I want and mounted with appropriate measurements for woodturning tools I sharpen, this speed controller is a good addition. At about half the dial the voltage gets so low that the grinder shuts off, but about mid range the RPM is slowed enough for sharpening and reduction of the heat build-up for my tools. Cheaper options for a controller just don't work at all.

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*Product available on Desertcart Saudi Arabia*
*Store origin: SA*
*Last updated: 2026-09-27*