--- product_id: 349951260 title: "RioRand 7-80V PWM DC Motor Speed Controller Switch 30A" brand: "riorand" price: "€ 31.28" currency: EUR in_stock: true reviews_count: 5 category: "Rio Rand" url: https://www.desertcart.pt/products/349951260-riorand-7-80v-pwm-dc-motor-speed-controller-switch-30a store_origin: PT region: Portugal --- # 7-70V wide voltage range 30A high current capacity Smooth PWM speed control RioRand 7-80V PWM DC Motor Speed Controller Switch 30A **Brand:** riorand **Price:** € 31.28 **Availability:** ✅ In Stock ## Summary > ⚙️ Master your motor’s speed with precision and power! ## Quick Answers - **What is this?** RioRand 7-80V PWM DC Motor Speed Controller Switch 30A by riorand - **How much does it cost?** € 31.28 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/349951260-riorand-7-80v-pwm-dc-motor-speed-controller-switch-30a) ## 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 - • **Durable & Stable Design:** Optimized circuit for long-term, reliable operation without noise - • **Seamless Speed Adjustment:** PWM control ensures smooth, vibration-free motor speed changes - • **Powerful 30A Current Handling:** Handles high current loads for demanding tasks - • **Universal Voltage Flexibility:** Supports 7-70V DC for versatile motor applications - • **Integrated Run/Stop Brake Switch:** Onboard switch for instant motor control and safety ## Overview The RioRand 7-70V PWM DC Motor Speed Controller Switch delivers robust 30A current handling with a wide voltage range, enabling precise and smooth speed control for brushed DC motors. Featuring an integrated run/stop brake switch and a stable, noise-free circuit design, it’s engineered for reliable, long-term use across diverse applications requiring dynamic motor performance. ## Description Brand:RioRandProduct Name :DC Brush Motor Speed Controller DC Controller is required in the following situations:1. Need a wider speed range.2. Need fast dynamic response process.3. Automatic smooth transition is required during acceleration and deceleration.4. High torque is required when low speed operation is required.5. Good excavator characteristics are needed, which can automatically limit the overload current to the set current6.And it is a DC Motor Speed Controller,Not a Voltage Controller Review: Works good - Works good, speed control knob spins kind of easy on bumps is my only complaint. Review: Works - I used this to reduce the voltage on a Power Wheels that now operates on a Dewalt 20V Max battery. The board appears to be relatively simple. I am not an experienced electrical technician, but the one feature I would have liked to see was some indication on the dial as to what voltage was being given. In lieu of this, I placed an LCD voltage monitor on the output side and can now monitor the voltage being sent to the motor, but it’s essentially useless as the meter will show high spikes of voltage and then drop, which I suspect is the result of the use of the lithium ion batteries. Nonetheless, when the dial is too low, the motor will not turn, and an adjustment of the dial will adjust in over-voltage, so this piece certainly does work. ## Features - Wide voltage 7-70V high current 30A design for a wide range of applications, on-board switch with run stop brake function, adjust the potentiometer soft line can be separated, wire length 15CM. - Circuit for optimized design, duty cycle adjustment range is wide, adjust the motor smooth without bath sound No vibration, with power indication, the circuit design is stable and suitable for long time work. - This product is a DC brush motor speed controller, need a separate DC power supply to the governor/controller power supply can not be connected to AC power can not drive brushless motor. - Before wiring power, please read the wiring label, the input is DC power positive and negative poles can not be engaged, the output is connected to the motor (motor) does not need to be divided into positive and negative, if the direction of operation is not right, please replace the motor of the two wires. - On the voltage or current regulation, adjust the duty cycle is in the unit time to control the on-off time, the output is a pulse, no-load with a voltmeter to measure the output voltage and input close to the motor connected to change the duty cycle added to the motor on both sides of the average voltage changes to achieve speed regulation, the voltage changes in the current of course followed by changes. The role of the current, and the current is derived from the change in voltage. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B071NQ5G71 | | Best Sellers Rank | #147,758 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #194 in Electrical Motor Controls | | Brand | RioRand | | Brand Name | RioRand | | Color | Green | | Colour | Green | | Customer Reviews | 4.2 out of 5 stars 4,138 Reviews | | Included Components | NO | | Item Type Name | Motor Speed Controller Switch 30A | | Item Weight | 0.28 Pounds | | Item weight | 0.28 Pounds | | Manufacturer | RioRand | | Material | copper | | Material Type | copper | | Model | 7-70V PWM DC | | Part Number | RR-MJLK-FBDG | | Smart Home Compatibility | Not Smart Home Compatible | | UPC | 637012215377 | | Unit Count | 1 Count | | Unit count | 1 Count | ## Product Details - **Brand:** RioRand - **Colour:** Green - **Item weight:** 0.28 Pounds - **Material:** copper - **UPC:** 637012215377 ## Images ![RioRand 7-80V PWM DC Motor Speed Controller Switch 30A - Image 1](https://m.media-amazon.com/images/I/71tU-B63OCL.jpg) ![RioRand 7-80V PWM DC Motor Speed Controller Switch 30A - Image 2](https://m.media-amazon.com/images/I/61wf3bdCiwL.jpg) ![RioRand 7-80V PWM DC Motor Speed Controller Switch 30A - Image 3](https://m.media-amazon.com/images/I/71ARF66pjPL.jpg) ![RioRand 7-80V PWM DC Motor Speed Controller Switch 30A - Image 4](https://m.media-amazon.com/images/I/71fcOS924iL.jpg) ![RioRand 7-80V PWM DC Motor Speed Controller Switch 30A - Image 5](https://m.media-amazon.com/images/I/61jQP69zjJL.jpg) ## Questions & Answers **Q: What does p and m mean? If Have 3 dc fans wired in parallel, which ports would be appropriate to install the wires into. And where to install power?** A: Pwm stands for pulse width modulation. It's a way to take the available power from the battery and mange the power delivery to the device. Instead of the battery discharging at 100% rate, the power is being sent out in on/off pulses. This reduces the battery drain. The frequency of the pulses is selected by the user when turning the control knob. Some devices will work well with this (dc electric motors with this unit) and others may not. The benefits of this are: (1) Battery efficiency - This scheme is commonly used for motors powered by batteries to achieve significant improvements in battery life. I use mine (50 amp version) to run my older trolling motor. My batteries can last even double the amount of time by dialing back the knob so that I'm sending out a smaller percentage of the power than 100%. So, for example, if I chose to have the control set to 40% of max I would achieve a significant improvement in battery life. This also means that the motor would run slower. There is a trade off in performance, but it heavily favors battery efficiency. The way I use it, is with a voltage meter readout to observe it's performance. I've been able to deduce that the most efficient gear to use on my trolling motor is the fastest gear. Once I know that, I turn the dial to achieve the speed I want to go instead of achieving the same speed in a less efficient gear. I watch the battery meter to observe how fast the battery draw down is happening over time and choose a top speed that I'm willing to live with as a trade off of power versus battery life. Why this works is because batteries are most efficient when the discharge rate is the slowest. If I'm maxing the battery discharge rate, I'm reducing the battery run time. There is a sweet spot where the battery is happy and the speed is acceptable. (2) Infinite variable speed. This offers variable speed to a motor that only has one speed or several geared speeds. If you couldn't quite hit the right trolling speed in a fixed gear, you can nail the speed with this variable speed control. (3) Some units also have polarity reversal, which means that I can flip that switch and the motor will go in reverse. If a person fashioned a remote steering system for the trolling motor, the trolling motor tiller handle wouldn't have to be touched. It could operate remotely from another location in the boat. Some newer motors have this feature built in, so this device wouldn't have any benefit. A different application would be to have a 12 volt power supply and a 12 volt motor (old treadmills can sometimes have the motors). Hook up the 12 volt motor to a drill press, lathe, bandsaw, etc. and the device would now achieve variable speed. This is really useful for these tools. In the case of a bandsaw, a typical woodworking bandsaw witht the right blade can run slow enough to cut metal. The simpler way to have this effect for those tools would be to get an AC version of the pwm. This would still work, but would be more ideal for someone willing to retrofit the tool. It would be good for alternative energy users (solar, wind, battery banks). **Q: How many wires come from the potentionmeter and can you add on to them?** A: 3 wires. tiny voltage divider... this is all based on a 555 circuit driving 3 mosfets in parallel. **Q: Will this work with 2 power wheel motors?** A: As long as the power wheels motors are within its voltage range, yes. Just be careful not to feed them more voltage than they are rated for, or use a power supply whose voltage is matched to the spec of the motors **Q: ¿nesecito para regular pulidoras cual es recomendable?** A: Este aparato es muy servisial y creo que si lo puedes usar en las pulidora rregula la belosidad ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works good *by L***N on 27 April 2026* Works good, speed control knob spins kind of easy on bumps is my only complaint. ### ⭐⭐⭐⭐⭐ Works *by B***. on 29 June 2024* I used this to reduce the voltage on a Power Wheels that now operates on a Dewalt 20V Max battery. The board appears to be relatively simple. I am not an experienced electrical technician, but the one feature I would have liked to see was some indication on the dial as to what voltage was being given. In lieu of this, I placed an LCD voltage monitor on the output side and can now monitor the voltage being sent to the motor, but it’s essentially useless as the meter will show high spikes of voltage and then drop, which I suspect is the result of the use of the lithium ion batteries. Nonetheless, when the dial is too low, the motor will not turn, and an adjustment of the dial will adjust in over-voltage, so this piece certainly does work. ### ⭐⭐⭐⭐⭐ Great variable speed control on dc motors *by M***C on 4 December 2025* Used this controller on 12v radiator fans, and works like a charm. Easy wire up as well ## Frequently Bought Together - RioRand 7-70V PWM DC Motor Speed Controller Switch 30A - Digital Low Voltage Protector Disconnect Switch Cut Off 12V Over-Discharge Protection Module for 12-36V Lead Acid Lithium Battery Low Voltage Cutoff for Solar Panel Lighting System Camper - for Power Wheel Adapter Compatible with Dewalt 20V Battery Converter Kit with Switch & Fuse & Wire Terminals & 12 AWG Wire for DIY RC Car Toys Robotics --- ## 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.pt/products/349951260-riorand-7-80v-pwm-dc-motor-speed-controller-switch-30a](https://www.desertcart.pt/products/349951260-riorand-7-80v-pwm-dc-motor-speed-controller-switch-30a) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-07-13*