--- product_id: 42937479 title: "RioRand 7-70V 30A PWM DC Motor Speed Controller for Brushed Motors | Aluminum Stepless Regulator w/ Brake,15cm Detachable Potentiometer,Extra Fuse for DIY,Ride-On Mods,Trolling & RV Fans Green" brand: "riorand" price: "AR$58609" currency: ARS in_stock: true category: "Rio Rand" url: https://www.desertcart.com.ar/products/42937479-riorand-7-70v-30a-pwm-dc-motor-speed-controller-brushed store_origin: AR region: Argentina --- # 7-70V wide voltage range Aluminum heat-dissipating housing Stepless 1%-100% PWM speed control RioRand 7-70V 30A PWM DC Motor Speed Controller for Brushed Motors | Aluminum Stepless Regulator w/ Brake,15cm Detachable Potentiometer,Extra Fuse for DIY,Ride-On Mods,Trolling & RV Fans Green **Brand:** riorand **Price:** AR$58609 **Availability:** ✅ In Stock ## Summary > ⚙️ Master your motor’s speed with precision and power — DIY like a pro! ## Quick Answers - **What is this?** RioRand 7-70V 30A PWM DC Motor Speed Controller for Brushed Motors | Aluminum Stepless Regulator w/ Brake,15cm Detachable Potentiometer,Extra Fuse for DIY,Ride-On Mods,Trolling & RV Fans Green by riorand - **How much does it cost?** AR$58609 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/42937479-riorand-7-70v-30a-pwm-dc-motor-speed-controller-brushed) ## 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 - • **Power Your DIY Dreams:** Supports 7-70V brushed DC motors with precise 1%-100% stepless speed regulation for ultimate customization. - • **Plug & Play Confidence:** Foolproof wiring with clear polarity markings and non-polarized motor outputs for effortless installation and rotation reversal. - • **Stay Cool Under Pressure:** Heavy-duty aluminum casing and high-voltage MOSFETs ensure low heat and vibration-free operation during long runtimes. - • **Built to Protect & Perform:** Extra fuse and overcurrent protection safeguard your projects from surges, delivering reliable, stable performance every time. - • **Control at Your Fingertips:** Includes a 15cm detachable potentiometer and integrated brake switch for flexible external panel mounting and smooth speed transitions. ## Overview The RioRand 7-70V 30A PWM DC Motor Speed Controller is a robust, aluminum-housed regulator designed for brushed DC motors. It offers stepless 1%-100% speed control with quiet 12kHz PWM, wide voltage compatibility, foolproof wiring, and integrated brake control. Ideal for DIY enthusiasts, ride-on mods, and small electric devices, it features overcurrent protection and a detachable potentiometer for flexible, reliable operation. ## Description RioRand 7-70V 30A PWM DC Motor Speed Controller for Brushed Motors | Aluminum Stepless Regulator w/ Brake,15cm Detachable Potentiometer,Extra Fuse for DIY,Ride-On Mods,Trolling & RV Fans Green - desertcart.com ## Features - 1.Wide Voltage & Scientific Power Matching — Exclusively designed for brushed DC motors, this 7-70V wide-range controller provides 1%-100% stepless speed regulation with quiet 12kHz PWM operation. It follows precise graded power limits: 12V≤250W, 24V≤350W, 48V≤450W, 60V≤400W. A 5-10V voltage margin is strongly recommended to prevent overload damage, perfect for DIY builds, electric ride-on vehicle mods and small electric devices. - 2.Low Heat & Heavy-Duty Durability — Built with high-voltage MOSFET and three 100V capacitors, paired with a full aluminum heat-dissipating housing to reduce heat buildup and eliminate vibration noise. The stable upgraded circuit supports long continuous runtime for workshop tools, agricultural pumps and marine trolling motors for reliable daily light-duty use. - 3.Accurate Load Voltage Guidance — Solves the most common user misconception: unloaded PWM controllers show input voltage normally. Real adjustable speed and output voltage can only be measured with a loaded brushed motor. Delivers precise tuning for DIY robotics, mini pumps, ventilation fans and small grinding tools. - 4.Foolproof Wiring & Flexible Brake Control — Clearly marked DC input polarity avoids reverse connection damage. Motor outputs are non-polarized for easy rotation reversal. Integrated run/stop/brake switch and 15cm detachable potentiometer allow flexible external panel mounting for all modification projects. - 5.Overcurrent Protection & Smooth Performance — Comes with a spare fuse for reliable overcurrent protection against sudden current surges and burnout. Optimized circuitry ensures ultra-smooth speed transitions and stable operation, ideal for hobbyists and small equipment maintenance. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B071NQ5G71 | | Best Sellers Rank | #15,124 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Electrical Motor Controls | | Brand Name | RioRand | | Color | Green | | Customer Reviews | 4.2 4.2 out of 5 stars (5,073) | | Included Components | NO | | Item Type Name | Motor Speed Controller Switch 30A | | Item Weight | 4.48 ounces | | Manufacturer | RioRand | | Material Type | Iron | | Model | 7-70V PWM DC | | Part Number | RR-MJLK-FBDG | | UPC | 637012215377 | | Unit Count | 1 Count | | Warranty Description | 3 months | ## Product Details - **Brand:** RioRand - **Color:** Green - **Item Weight:** 4.48 ounces - **Material:** Iron - **UPC:** 637012215377 ## Images ![RioRand 7-70V 30A PWM DC Motor Speed Controller for Brushed Motors | Aluminum Stepless Regulator w/ Brake,15cm Detachable Potentiometer,Extra Fuse for DIY,Ride-On Mods,Trolling & RV Fans Green - Image 1](https://m.media-amazon.com/images/I/71tU-B63OCL.jpg) ![RioRand 7-70V 30A PWM DC Motor Speed Controller for Brushed Motors | Aluminum Stepless Regulator w/ Brake,15cm Detachable Potentiometer,Extra Fuse for DIY,Ride-On Mods,Trolling & RV Fans Green - Image 2](https://m.media-amazon.com/images/I/61wf3bdCiwL.jpg) ![RioRand 7-70V 30A PWM DC Motor Speed Controller for Brushed Motors | Aluminum Stepless Regulator w/ Brake,15cm Detachable Potentiometer,Extra Fuse for DIY,Ride-On Mods,Trolling & RV Fans Green - Image 3](https://m.media-amazon.com/images/I/71ARF66pjPL.jpg) ![RioRand 7-70V 30A PWM DC Motor Speed Controller for Brushed Motors | Aluminum Stepless Regulator w/ Brake,15cm Detachable Potentiometer,Extra Fuse for DIY,Ride-On Mods,Trolling & RV Fans Green - Image 4](https://m.media-amazon.com/images/I/71fcOS924iL.jpg) ![RioRand 7-70V 30A PWM DC Motor Speed Controller for Brushed Motors | Aluminum Stepless Regulator w/ Brake,15cm Detachable Potentiometer,Extra Fuse for DIY,Ride-On Mods,Trolling & RV Fans Green - Image 5](https://m.media-amazon.com/images/I/61jQP69zjJL.jpg) ## Available Options This product comes in different **Set** options. ## 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 ## 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.com.ar/products/42937479-riorand-7-70v-30a-pwm-dc-motor-speed-controller-brushed](https://www.desertcart.com.ar/products/42937479-riorand-7-70v-30a-pwm-dc-motor-speed-controller-brushed) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-07-28*