---
product_id: 206202711
title: "PWM DC Motor Speed Controller, DC 10-55V / Rated 40A, LED Display Stepless DC Motor Speed Controller with Adjustable Potentiometer and Forward-Brake-Reverse Switch"
brand: "harmnee"
price: "17337 Ft"
currency: HUF
in_stock: true
reviews_count: 10
category: "Harmnee"
url: https://www.desertcart.hu/products/206202711-pwm-dc-motor-speed-controller-dc-10-55v-rated-40a
store_origin: HU
region: Hungary
---

# 40A rated current LED speed display Forward-Brake-Reverse switch PWM DC Motor Speed Controller, DC 10-55V / Rated 40A, LED Display Stepless DC Motor Speed Controller with Adjustable Potentiometer and Forward-Brake-Reverse Switch

**Brand:** harmnee
**Price:** 17337 Ft
**Availability:** ✅ In Stock

## Summary

> ⚙️ Take command of your motor’s speed and direction like a pro — no compromises, just control.

## Quick Answers

- **What is this?** PWM DC Motor Speed Controller, DC 10-55V / Rated 40A, LED Display Stepless DC Motor Speed Controller with Adjustable Potentiometer and Forward-Brake-Reverse Switch by harmnee
- **How much does it cost?** 17337 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/206202711-pwm-dc-motor-speed-controller-dc-10-55v-rated-40a)

## Best For

- harmnee enthusiasts

## Why This Product

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

## Key Features

- • **Real-Time Feedback:** Bright LED display keeps you informed of exact motor speed for precision tuning.
- • **Directional Mastery:** Easily switch between clockwise and counterclockwise rotation with a simple latching switch.
- • **Cool & Durable Design:** Aluminum enclosure with strategic ventilation ensures superior heat dissipation and longevity.
- • **Powerhouse Performance:** Handles up to 40A rated current with a max surge of 60A for robust motor control.
- • **Seamless Speed Control:** Stepless potentiometer knob lets you dial motor speed smoothly from 0% to 100%.

## Overview

This PWM DC Motor Speed Controller supports DC 10-55V input with a rated current of 40A and max 60A surge, featuring a stepless potentiometer for smooth speed adjustment and an LED display for real-time speed monitoring. Its forward-brake-reverse switch enables easy directional control, while the aluminum enclosure with ventilation ensures excellent heat dissipation, making it ideal for brush motor speed regulation and light dimming applications.

## Description

PWM DC Motor Speed Controller, DC 10-55V / Rated 40A, LED Display Stepless DC Motor Speed Controller with Adjustable Potentiometer and Forward-Brake-Reverse Switch - desertcart.com

Review: Good goods - Works good, i using it for a trolling motor,
Review: Reduced Amerage Rating Required - We have purchased three different DC controllers for this project. The first two were from China and rated at 30 amps. They both got very hot and failed at 10 amps. We subseuently purchased this controller, which was more sophisticated and had nice remote controls and a speed or percent power indicator. This one is rated at 40 amps, whereas our application required 12 amps, so we intended to run it at about 30% or rated output. At 12 amps, this one also got hot but didnot burn out. We reduced the running amperage to 10 amps and the device did not reach a failure temperature level. We will build this unit into our product but reduce the rating to maximum of 15 amps rather than the published 40 amps. The controls and indicator are very well done.

## Features

- ♕【Technical Parameters】 Input supply voltage: DC 10V-55V; Rated current: 40A; Max current: 60A; Speed range: 0%-100% ; Apply to: DC Brush Motor
- ♕【CW/CCW Function】The switch can provide clockwise and counter clockwise rotation choice. With this latching switch, you can control the rotation direction easily.
- ♕【Excellent Heat Dissipation Performance】 The enclosure of the speed controller for motor is an aluminum enclosure. Aluminum shell is very strong to prevent damage, holes on its side and top which are helpful for heat dissipation.
- ♕【Easy to Operate】The stepless motor controller has a simple potentiometer knob adjusts the motor speed from 0% ~ 100% smoothly. LED display screen shows the motor speed from 0% to 100% of the rated speed.
- ♕【Application】 The DC motor driver can be used on brush motor speed regulation, light dimming regulation in the DC circuit. Note: The motor can not be used in electric vehicles.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B089273KVZ |
| Batteries Included? | No |
| Batteries Required? | Yes |
| Best Sellers Rank | #60,970 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #18 in Electrical Motor Controls |
| Customer Reviews | 4.0 4.0 out of 5 stars (571) |
| Date First Available | May 26, 2020 |
| Display Type | LED |
| Item Package Quantity | 1 |
| Item Weight | 8.3 ounces |
| Item model number | Standard 10-55V/60A Max |
| Manufacturer | WellHome Innovation |
| Part Number | Standard 10-55V/60A Max |
| Product Dimensions | 3.07 x 4.33 x 1.42 inches |
| Style | 40A |

## Product Details

- **Brand:** HARMNEE
- **Color:** Silver
- **Item Weight:** 8.32 ounces
- **Material:** Metal
- **Product Dimensions:** 3.1"L x 4.5"W x 1.4"H

## Images

![PWM DC Motor Speed Controller, DC 10-55V / Rated 40A, LED Display Stepless DC Motor Speed Controller with Adjustable Potentiometer and Forward-Brake-Reverse Switch - Image 1](https://m.media-amazon.com/images/I/71cG3dPGApL.jpg)

## Questions & Answers

**Q: can this pulse 12v , would it be ble to pulse 12v injector for cleaning
?**
A: The voltage of your injector is between our controller voltage range (10~55V). If your injector is with a DC brush motor and the rated current is below the 60A, HARMNEE pwm motor speed controller will fit for your injector.  The rated current is equal to the rate of power divided by voltage 12V.

**Q: Why is there a 3 way switch for this?**
A: one is for turning off the motor and the other two are for forward and reverse.

**Q: Can it be used with arduino to control motor speed and direction?**
A: I can't imagine why not as long as the Arduino project meets the volt and amp capacities of the Controller.

**Q: Lemon? Two right most terminals wired to 20V battery but the voltage across the two left most terminals always 20V no matter the % of pot adjustment.**
A: unplug the pot and connect a meter to center leg and either side legs and check ohms clime as you turn the knob. Make sure all connections are correct. If pot works then controller is bad.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good goods
*by J***N on December 8, 2025*

Works good, i using it for a trolling motor,

### ⭐⭐⭐⭐⭐ Reduced Amerage Rating Required
*by E***G on July 20, 2025*

We have purchased three different DC controllers for this project. The first two were from China and rated at 30 amps. They both got very hot and failed at 10 amps. We subseuently purchased this controller, which was more sophisticated and had nice remote controls and a speed or percent power indicator. This one is rated at 40 amps, whereas our application required 12 amps, so we intended to run it at about 30% or rated output. At 12 amps, this one also got hot but didnot burn out. We reduced the running amperage to 10 amps and the device did not reach a failure temperature level. We will build this unit into our product but reduce the rating to maximum of 15 amps rather than the published 40 amps. The controls and indicator are very well done.

### ⭐ Died Immediately -- Useless -- Waste of Money
*by B***Z on August 22, 2022*

The product died right away, despite being rated for 60A. Wrong. Carefully attached the unit to a small 12V power supply and a small motor (max draw 5A at stall). Double-checked all polarities before final connection. Turned on the main switch, then the potentiometer, and -- zilch. Nothing. Nada. Checking the unit with a multimeter, it is clear that the switches all work, but something on the board is hosed. My schedule is now kaput. I really want my money back, or a working unit. Disappointed.

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-01-25*