--- product_id: 537532995 title: "AC Variable Speed Controller, 120V~220V 15A 4000W SCR Voltage Controller for Router Fan Electric Motor Rheostat" brand: "sdrgeek" price: "₹ 6200" currency: INR in_stock: true reviews_count: 8 category: "Sdrgeek" url: https://www.desertcart.in/products/537532995-ac-variable-speed-controller-120v-220v-15a-4000w-scr-voltage store_origin: IN region: India --- # 15A max current 4000W max resistive load 0-220V adjustable output AC Variable Speed Controller, 120V~220V 15A 4000W SCR Voltage Controller for Router Fan Electric Motor Rheostat **Brand:** sdrgeek **Price:** ₹ 6200 **Availability:** ✅ In Stock ## Summary > ⚙️ Take control of your power — precision speed, zero compromise! ## 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?** ₹ 6200 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.in](https://www.desertcart.in/products/537532995-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 - • **Industrial-Grade Safety:** Zero hysteresis with peak absorption circuit protects against spikes and overheating for peace of mind. - • **Precision Power Control:** Seamlessly adjust voltage from 0 to 220V for tailored motor speed and fan airflow. - • **Robust High-Temp Design:** Durable all-aluminum heat sinks and FR-4 circuit boards ensure reliable performance under heavy loads. - • **Compact & Grounded Metal Build:** Sleek metal casing with double-sided copper layers and mandatory grounding for enhanced durability and safety. - • **Versatile Appliance Compatibility:** Perfect for fans, routers, electric stoves, and motors—empower your workspace with custom speed control. ## Overview The SDRGEEK AC Variable Speed Controller offers professional-grade voltage regulation from 0 to 220V with a 15A max current and up to 4000W resistive load capacity. Engineered with high-quality SMD thyristors, all-aluminum heat sinks, and a heat-resistant FR-4 circuit board, it delivers reliable, safe, and precise motor speed control for a variety of industrial and home appliances. Ideal for fans, routers, and electric motors, this compact metal device ensures durability and safety with advanced protection circuits and grounding requirements. ## Description AC Variable Speed Controller, 120V~220V 15A 4000W SCR Voltage Controller for Router Fan Electric Motor Rheostat - desertcart.com Review: Great motor speed control - Works very well on my bench grinder converted into a buffer 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 | #126,850 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #62 in Electrical Motor Controls | | Brand | SDRGEEK | | Brand Name | SDRGEEK | | Color | Black | | Customer Reviews | 4.1 out of 5 stars 165 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 | 1.08 Pounds | | Manufacturer | SDRGEEK | | Material | Metal | | Material Type | Metal | | Product Dimensions | 4.49"L x 3.94"W x 3.15"H | ## Product Details - **Color:** Black - **Brand:** SDRGEEK - **Voltage:** 2.2E+2 Volts (AC) - **Product Dimensions:** 4.49"L x 3.94"W x 3.15"H - **Material:** Metal ## 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/71Bx6q70yBL.jpg) ## Available Options This product comes in different **Color, Size** options. ## 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 ### ⭐⭐⭐⭐⭐ Great motor speed control *by J***Z on March 11, 2026* Works very well on my bench grinder converted into a buffer ### ⭐⭐⭐⭐⭐ 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. ### ⭐⭐⭐⭐⭐ Problem Solved! *by S***M on August 2, 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.in/products/537532995-ac-variable-speed-controller-120v-220v-15a-4000w-scr-voltage](https://www.desertcart.in/products/537532995-ac-variable-speed-controller-120v-220v-15a-4000w-scr-voltage) --- *Product available on Desertcart India* *Store origin: IN* *Last updated: 2026-05-03*