---
product_id: 139011829
title: "QWinOut 2-4S 30A RC Brushless ESC Simonk Firmware Electric Speed Controller with 5V 3A BEC with 3.5mm Female Banana Bullet for 2 to 4s Lipo Battery, DIY Multicopter Quadcopter (30A,1 pcs)"
brand: "qwinout"
price: "KSh4930"
currency: KES
in_stock: true
reviews_count: 8
url: https://www.desertcart.co.ke/products/139011829-qwinout-2-4s-30a-rc-brushless-esc-simonk-firmware-electric
store_origin: KE
region: Kenya
---

# 30A Power Compact Design 5V 3A BEC QWinOut 2-4S 30A RC Brushless ESC Simonk Firmware Electric Speed Controller with 5V 3A BEC with 3.5mm Female Banana Bullet for 2 to 4s Lipo Battery, DIY Multicopter Quadcopter (30A,1 pcs)

**Brand:** qwinout
**Price:** KSh4930
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate Your Flight Experience!

## Quick Answers

- **What is this?** QWinOut 2-4S 30A RC Brushless ESC Simonk Firmware Electric Speed Controller with 5V 3A BEC with 3.5mm Female Banana Bullet for 2 to 4s Lipo Battery, DIY Multicopter Quadcopter (30A,1 pcs) by qwinout
- **How much does it cost?** KSh4930 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/products/139011829-qwinout-2-4s-30a-rc-brushless-esc-simonk-firmware-electric)

## Best For

- qwinout enthusiasts

## Why This Product

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

## Key Features

- • **Unmatched Power:** Experience 30A of pure performance for your DIY multicopter.
- • **Noise-Free Flight:** Military-grade capacitors ensure a smooth, RF noise-free flying experience.
- • **Robust Anti-Jamming:** Microprocessor with dedicated voltage regulation for superior reliability.
- • **Lightweight & Compact:** Designed for easy installation without compromising on power.
- • **Plug-and-Play Convenience:** Soldered with 3.5mm female banana connectors for hassle-free setup.

## Overview

The QWinOut2-4S 30A RC Brushless ESC is a high-performance electric speed controller designed for 2 to 4S LiPo batteries. Featuring SimonK firmware, it offers a robust 30A current capacity, a 5V 3A BEC, and a compact design for easy installation. With military-standard capacitors and a dedicated microprocessor, this ESC ensures a reliable and noise-free flying experience.

## Description

NOTE: 1. ESC was soldered with 3.5mm Female banana connectors, effectively avoid welding problems; 2. have set up the Simonk Firmware program.Brand: QWinOut Working current: 30A/40A (Optional on my shop) Output:  30A Version: Continuous 25A, Burst 40A up to 10 Secs 40A Version: Continuous 40A, Burst 55A not down to 10 Secs Input Voltage:2-4 cells lithium battery or 5-12 cells NiCd/NIMh batteryBEC:5V 3AMax Speed:210,000rpm for 2 Poles BLM, 70,000rpm for 6 poles BLM, 35,000rpm for 12 poles BLM.(BLM: BrushLess Motor)Weight:about 25gCompatible for: DIY FPV KK MK MWC RC Quadcopter Hexacopter Multi-Rotor Aircraft;210 360 450 Helicopter;380 f450 f550 and other four-axis six-axis fixed-wing drone.Features1.Safety Arming Feature: Regardless the throttle stick position, the motor will not spin after battery connected.2.Throttle Calibration: Throttle range can be configured to provide best throttle linearity, fully compatible with all market available transmitters.3.Programmable Items:Brake Setting:brake enabled/brake disabled. Battery Type:Li-xx(Li-ion or LiPo)/Ni-xx(NiMh or NiCd). Low Voltage Protection Mode(Cutoff Mode):Gradually reduce the output power/Cutoff the output power. Low Voltage Cutoff Protection Threshold (Cutoff Threshold):low/medium/high. Start Mode: normal/soft/very soft. Timing:low/medium/high. Reset: reset all the programmable items to their default settings.4.Full Protection Features: Low voltage cutoff protection/Over-heat protection/Throttle signal lost protection. Suggestion:Do a throttle range adjustment before taking off as following steps:1.Connect ESC/motor/receiver2.Push the remote control throttle to maximum3.Connect power 4.Hear the regular sound of D- D- D……, unplug battery5.Reconnect power and hear DD quickly sound 6.Pull the throttle to minimum7.D sound once, calibration successful

## Features

- NOTE: 1. Since 2020.07.05, this items was soldered with 3.5mm Female banana connectors, effectively avoid welding problems; 2. We have set up the program, the ESC do not need additional program
- Input voltage:2-4 S; BEC: 5V 3A; Working current: 30A / 40A (Optional on my shop)
- Universal SimonK Firmware 30A/40A ESC Brushless Speed Controller, super simple. Small size combined with light weight for easy installation. (30A/40A is optional on my shop)
- Military standard capacitor of extreme low resistance increases the ability of prevention of unwanted RF noise during flying. Extreme low resistance PCB is helpful for getting a super current endurance capability.
- Microprocessor uses separate voltage regulator IC, with good anti-jamming capability.

## Images

![QWinOut 2-4S 30A RC Brushless ESC Simonk Firmware Electric Speed Controller with 5V 3A BEC with 3.5mm Female Banana Bullet for 2 to 4s Lipo Battery, DIY Multicopter Quadcopter (30A,1 pcs) - Image 1](https://m.media-amazon.com/images/I/51tOxXpPfML.jpg)
![QWinOut 2-4S 30A RC Brushless ESC Simonk Firmware Electric Speed Controller with 5V 3A BEC with 3.5mm Female Banana Bullet for 2 to 4s Lipo Battery, DIY Multicopter Quadcopter (30A,1 pcs) - Image 2](https://m.media-amazon.com/images/I/51d9VNjPB7L.jpg)
![QWinOut 2-4S 30A RC Brushless ESC Simonk Firmware Electric Speed Controller with 5V 3A BEC with 3.5mm Female Banana Bullet for 2 to 4s Lipo Battery, DIY Multicopter Quadcopter (30A,1 pcs) - Image 3](https://m.media-amazon.com/images/I/519yRcrsqJL.jpg)
![QWinOut 2-4S 30A RC Brushless ESC Simonk Firmware Electric Speed Controller with 5V 3A BEC with 3.5mm Female Banana Bullet for 2 to 4s Lipo Battery, DIY Multicopter Quadcopter (30A,1 pcs) - Image 4](https://m.media-amazon.com/images/I/51AM5f6eUNL.jpg)
![QWinOut 2-4S 30A RC Brushless ESC Simonk Firmware Electric Speed Controller with 5V 3A BEC with 3.5mm Female Banana Bullet for 2 to 4s Lipo Battery, DIY Multicopter Quadcopter (30A,1 pcs) - Image 5](https://m.media-amazon.com/images/I/617SuFSgKSL.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ DON'T FOLLOW SELLER INSTRUCTIONS FOR CALLIBRATING
*by O***T on August 8, 2021*

So when I first tried to use these they wouldn't work at all. My main problem turned out to be not having a common ground because I had different power sources for my Arduino controller and the ESC's/Motors. They all work great and don't seem to have any heating issues yet.Used with 935kv motors and 3S battery, working well so farFOR CALLIBRATING:1. Have motor/reciever sending data2. Throttle up to full3. Power the ESC/Motor3. You should hear 3 D's (means getting power) followed by 1 D (means getting HIGH signal)4. Lower throttle to the minimum5. You should hear 2 D's -- after that you should be good to throttle up

### ⭐⭐⭐⭐⭐ Ok but tricky
*by C***S on April 9, 2025*

I initially left a bad review, because after connecting this to an Arduino and trying to activate a motor with a basic servo sketch, it did nothing other than make the ESC beep. Then I did some more research and learned these ESCs have a startup routine needed to "arm" them, AND that I needed to power cycle the ESC after each Arduino update. After doing both of those, then my servo sketch worked.

### ⭐ Complete junk! Don’t waste your money
*by R***R on November 24, 2022*

I have been through four of these now, and don’t ask me why I have ordered so many after having so much trouble! Two of them burned out for no apparent reason, likely they are way overrated by their amperage. The other two caused some type of voltage transient, resulting in multiple plane crashes. The whole time I suspected faulty receivers, servos, etc.. After changing them all out and still dealing with the same problem, I switched out ESC’s. Miraculously, no problems! I don’t know how an ESC can cause so many issues, but between the interference and the outright failures, I am zero for four, and many, many lost hours trying to troubleshoot. I can’t steer you away from this product strongly enough!

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*Product available on Desertcart Kenya*
*Store origin: KE*
*Last updated: 2026-02-24*