---
product_id: 556881821
title: "AC Variable Speed Controller, 120V~220V 15A 4000W SCR Voltage Controller for Router Fan Electric Motor Rheostat"
brand: "sdrgeek"
price: "0.27 OMR"
currency: OMR
in_stock: true
reviews_count: 5
url: https://www.desertcart.com.om/products/556881821-ac-variable-speed-controller-120v-220v-15a-4000w-scr-voltage
store_origin: OM
region: Oman
---

# 4000W max resistive power 15A max current capacity 0-220V adjustable output AC Variable Speed Controller, 120V~220V 15A 4000W SCR Voltage Controller for Router Fan Electric Motor Rheostat

**Brand:** sdrgeek
**Price:** 0.27 OMR
**Availability:** ✅ In Stock

## Summary

> ⚙️ Master your motor’s rhythm with precision power control!

## Quick Answers

- **What is this?** AC Variable Speed Controller, 120V~220V 15A 4000W SCR Voltage Controller for Router Fan Electric Motor Rheostat by sdrgeek
- **How much does it cost?** 0.27 OMR with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/556881821-ac-variable-speed-controller-120v-220v-15a-4000w-scr-voltage)

## 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 Design:** Equipped with zero hysteresis, peak absorption circuits, and grounded metal casing for reliable protection.
- • **Robust Power Handling:** Supports up to 4000W resistive and 1500W inductive loads for versatile applications.
- • **Precision Voltage Control:** Seamlessly adjust output from 0 to 220V for tailored power delivery.
- • **Industrial-Grade Durability:** Built with high-quality SMD thyristors and all-aluminum heat sinks for superior heat dissipation.
- • **Wide Appliance Compatibility:** Perfect for fans, routers, electric stoves, and motors—empower your workspace with precise speed control.

## Overview

The AC Variable Speed Controller is a heavy-duty, adjustable voltage regulator designed for 120V-220V inputs, delivering up to 4000W resistive power and 15A current. Engineered with premium SMD thyristors and robust heat sinks, it ensures safe, reliable operation with zero delay and advanced protection circuits. Ideal for controlling speed and power in fans, routers, electric stoves, and various motors, this controller offers professional-grade performance for demanding industrial and DIY applications.

## Description

Specifications:Input voltage: AC 110-220V, 50/60Hz Output voltage: 0-110V(110V input), 0-220V(220V input) Normal current: 9A Max current: 18A Fuse: 15A Maximum output power: 4000W Material: metal, plastic Weight: 1.08lb Dimensions: 4.53*3.74*3.15*in

Review: 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: It works great I'm using it on my drill press which works excellent

## 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 |
| Customer Reviews | 4.0 4.0 out of 5 stars (118) |
| Date First Available | 23 July 2023 |
| Display type | LCD or LED |
| Included components | 1 x Fan Speed Controller |
| Item model number | SD-4000W-01 |
| Manufacturer | SDRGEEK |
| Product Dimensions | 11.4 x 10.01 x 8 cm; 489.88 g |

## Product Details

- **Brand:** SDRGEEK
- **Colour:** Black
- **Item weight:** 1.08 Pounds
- **Material:** bronze, copper, iron, metal, aluminum
- **Product dimensions:** 11.4L x 10W x 8H centimeters

## Images

![AC Variable Speed Controller, 120V~220V 15A 4000W SCR Voltage Controller for Router Fan Electric Motor Rheostat - Image 1](https://m.media-amazon.com/images/I/61k7Tc8VV5L.jpg)
![AC Variable Speed Controller, 120V~220V 15A 4000W SCR Voltage Controller for Router Fan Electric Motor Rheostat - Image 2](https://m.media-amazon.com/images/I/71-78CkEYoL.jpg)
![AC Variable Speed Controller, 120V~220V 15A 4000W SCR Voltage Controller for Router Fan Electric Motor Rheostat - Image 3](https://m.media-amazon.com/images/I/710-OKUoDNL.jpg)
![AC Variable Speed Controller, 120V~220V 15A 4000W SCR Voltage Controller for Router Fan Electric Motor Rheostat - Image 4](https://m.media-amazon.com/images/I/710GwhTgaSL.jpg)
![AC Variable Speed Controller, 120V~220V 15A 4000W SCR Voltage Controller for Router Fan Electric Motor Rheostat - Image 5](https://m.media-amazon.com/images/I/71Bx6q70yBL.jpg)

## Questions & Answers

**Q: does support a small water pump? I already have a similar one in my water pump, but this one,in the description says it doesn't support it, why?**
A: You have to start the motor at 100% and then back it down to the desired RPM. I am running a one horsepower buffer on mine and you can definitely tell when you put too much pressure on it that the motor wants to stall. I would think a water pump would take a lot of amps and not like being slowed down.

**Q: does this lower the torque output of the motor?**
A: Yes

**Q: so i could use this to control the speed  on  a bench sander / grinder or a bandsaw?**
A: I don't think so...I will control things like a shop vac or router...something this is a DC motor that is supplied with AC...

**Q: I have an angle grinder, will this work with it? Thanks**
A: Yes, the voltage of the angle grinder can be adjusted
If you have any questions, please contact our email: Bosun128888@outlook.com

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by C***R on 18 February 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.

### ⭐⭐⭐⭐ Review
*by J***N on 29 July 2025*

It works great I'm using it on my drill press which works excellent

### ⭐⭐⭐⭐⭐ Review
*by S***M on 2 August 2025*

I had some issues getting this working, the way I wanted it to. But working with the manufacturer I was satisfied with the solutions they provided.

## Frequently Bought Together

- AC Variable Speed Controller, 120V~220V 15A 4000W SCR Voltage Controller for Router Fan Electric Motor Rheostat
- Leviton 3W101-E 2-Pole, 3 Wire Grounding Plug, Black

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*Product available on Desertcart Oman*
*Store origin: OM*
*Last updated: 2026-02-15*