---
product_id: 4482741
title: "RioRand 12V-40V 10A PWM DC Brushed Motor Speed Controller, Linear Governor Module with Reverse Polarity & Over Current Protection for DIY Fans, Pumps, RV and Garage Projects"
brand: "riorand"
price: "A$21"
currency: AUD
in_stock: true
category: "Rio Rand"
url: https://www.desertcart.com.au/products/4482741-riorand-12v-40v-10a-pwm-dc-brushed-motor-speed-controller
store_origin: AU
region: Australia
---

# 12V-40V wide voltage range 10A continuous current with reverse polarity protection Low heat generation for stable performance RioRand 12V-40V 10A PWM DC Brushed Motor Speed Controller, Linear Governor Module with Reverse Polarity & Over Current Protection for DIY Fans, Pumps, RV and Garage Projects

**Brand:** riorand
**Price:** A$21
**Availability:** ✅ In Stock

## Summary

> ⚙️ Master your motor’s pace with RioRand’s power-packed precision!

## Quick Answers

- **What is this?** RioRand 12V-40V 10A PWM DC Brushed Motor Speed Controller, Linear Governor Module with Reverse Polarity & Over Current Protection for DIY Fans, Pumps, RV and Garage Projects by riorand
- **How much does it cost?** A$21 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/4482741-riorand-12v-40v-10a-pwm-dc-brushed-motor-speed-controller)

## Best For

- riorand enthusiasts

## Why This Product

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

## Key Features

- • **Built-in Safety Shields:** Reverse polarity and high current protection safeguard your investment
- • **Compact & User-Friendly:** Compact 73x60x27mm size with intuitive knob control and clear terminal labeling
- • **Precision Speed Control:** Smooth PWM adjustment from 10% to 100% duty cycle for exact motor speed tuning
- • **Cool & Efficient Operation:** High efficiency design minimizes heat, ensuring longer device lifespan
- • **Robust Voltage Compatibility:** Operates seamlessly across 12V to 40V DC, fitting diverse motor setups

## Overview

The RioRand 12V-40V 10A PWM DC Motor Speed Controller offers professional-grade motor speed management with a wide voltage range and up to 10A current capacity. Featuring advanced PWM technology, it delivers smooth, precise speed control while maintaining high efficiency and low heat output. Its built-in reverse polarity and high current protections ensure durability and safety, making it an ideal choice for DIY enthusiasts and professionals seeking reliable, compact motor control solutions.

## Description

RioRand 12V-40V 10A PWM DC Brushed Motor Speed Controller, Linear Governor Module with Reverse Polarity & Over Current Protection for DIY Fans, Pumps, RV and Garage Projects: Electric Motor Controls: desertcart.com: Industrial & Scientific

## Features

- Professional PWM Governor for DC Brushed Motors：Powerful PWM speed control module compatible with 12V, 24V, 36V and 40V DC brushed motors. Rated 8A with 10A max support and up to 400W power capacity. NOT compatible with brushless or three-phase motors to avoid misapplication and damage.
- Smooth Linear Speed Control & Low-Noise Operation：Delivers reliable 10%–100% adjustable speed with 13kHz frequency for quiet performance. Ideal for DIY cooling fans, water pumps, small tools and garage projects, eliminating jumpy or full-speed-only operation.
- Enhanced Safety Features for Long-Lasting Use：Built-in reverse polarity protection, over current protection and a 10A replaceable fuse. Low-heat design with aluminum heat sink reduces burnout risks, ensuring stable performance for heavy-duty DIY and light industrial use.
- Clear Wiring & User-Friendly Installation：Labeled terminals (Motor-, Motor+, Power-, Power+) prevent wiring errors. Simple knob control requires no complex setup, making it perfect for hobbyists, students, and home repair replacements.
- Versatile for Garage, RV, Marine & DIY Projects：Compact and sturdy structure fits a wide range of applications including RV ventilation, water pump control, small equipment repair, robotics, and garage builds. A cost-effective replacement for old or broken speed controls.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B007TH4EN6 |
| Best Sellers Rank | #74,334 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #41 in Motor Speed Controllers |
| Brand Name | RioRand |
| Color | 12V-40V-10A-400W |
| Customer Reviews | 4.2 4.2 out of 5 stars (597) |
| Display Type | PWM DC motor speed controller |
| Global Trade Identification Number | 00645195917568 |
| Item Weight | 59 Grams |
| Manufacturer | RioRand |
| Material Type | Plastic |
| Model | RRPDMSCSGSPC |
| Part Number | RRPDMSCSGSPC |
| Smart Home Compatibility | Not Smart Home Compatible |
| UPC | 645195917568 619636102455 |
| Unit Count | 1.0 Count |
| Voltage | 12 Volts |
| Warranty Description | 3 months |

## Product Details

- **Brand:** RioRand
- **Color:** 12V-40V-10A-400W
- **Item Weight:** 59 Grams
- **Material:** Plastic
- **Voltage:** 12 Volts

## Images

![RioRand 12V-40V 10A PWM DC Brushed Motor Speed Controller, Linear Governor Module with Reverse Polarity & Over Current Protection for DIY Fans, Pumps, RV and Garage Projects - Image 1](https://m.media-amazon.com/images/I/71YDylKM9sL.jpg)

## Questions & Answers

**Q: is there any on/off switch in this?**
A: there is not on/off switch

**Q: I have a Battery is UB1250 12VDC 5Ah and connect to Fan that is 12DC 3.90A, 
is your item does the same application as Rheostat? if this is Not the right One?
which one you recommend please I look forward to your reply.**
A: It is similar in function to a rheostat, however, it does not waste energy by dropping the current across a resistor. This devise uses Pulse Width Modulation. If you are not familiar with this function, it basically chops the voltage in order to regulate the current output. You will be able to control the fan speed, without loosing current through a resistor in a rheostat and wasting your battery. I use it to control 12 and 24 volt wiper motors for animatronic devices. I use power supplies instead of batteries and have digital meters for output voltage, current, and motor rpm feedback by attaching a 10 tooth sprocket to the motor shaft and sensing by means of PNP proximity sensor. All of this gives me the ability to monitor and control functions of the motor quite precisely. You can also purchase versions of this controller that allow PWM control of the speed instead of the potentiometer which will then allow programmed speed patterns with a micro controller such as Arduino. This will be my next project.

**Q: Are there ports to screw the wires in or do they need to be soldered on?**
A: There are four screw ports on the side opposite the controller knob.  A pair for +/- power and another for motor.  They are clearly marked on the under side of the board.

**Q: How can I connect this to an Arduino to control a 12V motor?**
A: I did it the brute-force way.  I drilled a hole in the knob and inserted the shaft of a servo.  I then controlled the servo via the Arduino.  Not very elegant, to be sure, but nonetheless, effective.

## Frequently Bought Together

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-06-18*