What is the maximum update rate? 50Hz? 400Hz?

I update mine at 250Hz, 4msec. Haven't tried going faster so don't know if 400Hz is possible

Is the BEC linear or switching in these?

The BEC is a constant 5 V output You're running extra equipment on your airplane you might want to use an additional capacitor pack on your Receiver

How do I program the brake?

You set the break with the transmitter with the throttle stick and the paperwork for the ESC that it comes with will explain how to do so

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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, 4 pcs)

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, 4 pcs)

Product ID: 171204222

⚡30A continuous current output

🔋2-4S LiPo input voltage

🛠️Pre-flashed SimonK firmware

51925CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚀 Elevate your drone game with plug-and-play power and precision control!

SAFETY FIRST DESIGN - Multiple protections including low voltage cutoff, overheat, and throttle signal loss safeguard your investment.
PLUG PLAY POWERHOUSE - Pre-installed SimonK firmware means zero setup fuss—just install and fly.
ROBUST 30 A CURRENT HANDLING - Delivers continuous 30A with bursts up to 40A for aggressive throttle response.
NOISE FREE FLIGHT EXPERIENCE - Military-grade capacitors and low-resistance PCB minimize RF interference for smooth control.
UNIVERSAL BATTERY COMPATIBILITY - Supports 2-4S LiPo and 5-12 cell NiCd/NiMH batteries for versatile builds.

The QWinOut 2-4S 30A Brushless ESC is a compact, lightweight speed controller pre-flashed with SimonK firmware, designed for 2-4S LiPo batteries. It features a 5V 3A BEC, military-grade capacitors for RF noise reduction, and comprehensive safety protections, making it ideal for DIY multicopters and quadcopters seeking reliable, high-performance ESCs.

Specifications

ASIN	B07SFLJJQ5
Age Range Description	Adult
Best Sellers Rank	#433,842 in Toys & Games ( See Top 100 in Toys & Games ) #608 in Radio Control Vehicle Speed Controls
Brand Name	QWinOut
Color	30a, 4 Pcs
Customer Reviews	4.0 out of 5 stars 124 Reviews
Educational Objective	Game, play
Indoor Outdoor Usage	Outdoor
Manufacturer	QWinOut
Manufacturer Part Number	M18203-4
Manufacturer recommended age	0 - 2 years
Material Type	Plastic
Number of Packs	4
Number of Players	4
Operation Mode	Automatic
Power Source	Battery Powered
Set Name	4
Size	Small
Unit Count	4 Count

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