---
product_id: 638393870
title: "4000W AC Variable Speed Controller"
brand: "sdrgeek"
price: "KSh13302"
currency: KES
in_stock: true
reviews_count: 8
category: "Sdrgeek"
url: https://www.desertcart.co.ke/products/638393870-4000w-ac-variable-speed-controller
store_origin: KE
region: Kenya
---

# 4000W max resistive power 0-220V adjustable output voltage All-aluminum heat sink for high-temp durability 4000W AC Variable Speed Controller

**Brand:** sdrgeek
**Price:** KSh13302
**Availability:** ✅ In Stock

## Summary

> ⚙️ Master your power flow with precision and safety — don’t get left behind!

## Quick Answers

- **What is this?** 4000W AC Variable Speed Controller by sdrgeek
- **How much does it cost?** KSh13302 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/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

- • **Safety First:** Zero hysteresis with peak absorption circuit plus grounded metal case for ultimate protection.
- • **Built to Last:** Premium SMD thyristors and FR-4 heat-resistant circuit boards ensure long-term reliability under heavy use.
- • **Wide Compatibility:** Perfect for fans, electric stoves, heaters, and small motors—ideal for upgrading vintage or industrial gear.
- • **Powerhouse Performance:** Handles up to 4000W resistive and 1500W inductive loads for versatile control.
- • **Precision Voltage Control:** Smoothly adjusts output voltage from 0 to 220V to fine-tune motor speeds and heating elements.

## Overview

The 4000W AC Variable Speed Controller by SDRGEEK offers robust, adjustable voltage control (0-220V) with a max current of 15A, supporting up to 4000W resistive and 1500W inductive loads. Engineered with high-quality SMD thyristors, aluminum heat sinks, and heat-resistant FR-4 boards, it ensures durability and safety with zero hysteresis and a grounded metal case. Ideal for managing speed and power in fans, heaters, and small motors, this controller is a reliable upgrade for both vintage appliances and industrial equipment.

## Description

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

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.
Review: Works great on our old Kitchen Aide mixer. - Our old Kitchen Aide stand mixer speed switch quit working. Bought this variable speed controller and love it. Works great and much cheaper than a new mixer.

## 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 |
| Batteries required | No |
| Best Sellers Rank | #114,055 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #57 in Electrical Motor Controls |
| Customer Reviews | 4.1 4.1 out of 5 stars (162) |
| Display Type | LCD or LED |
| Included Components | controller |
| Item Weight | 1.08 pounds |
| Item model number | SD-4000W-01 |
| Manufacturer | SDRGEEK |
| Product Dimensions | 4.49 x 3.94 x 3.15 inches |

## 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

### ⭐⭐⭐⭐⭐ 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 great on our old Kitchen Aide mixer.
*by E***E on November 4, 2025*

Our old Kitchen Aide stand mixer speed switch quit working. Bought this variable speed controller and love it. Works great and much cheaper than a new mixer.

### ⭐⭐⭐⭐ 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 Kenya*
*Store origin: KE*
*Last updated: 2026-03-01*