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)

Product ID: 171204222

⚡30A continuous current output

🔋2-4S LiPo input voltage

🔌3.5mm female banana connectors

268.60 DT

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Description

🚀 Elevate your drone game with plug-and-play power and pro-grade reliability!

PLUG PLAY SIMON K FIRMWARE - Pre-programmed ESC means zero setup fuss—just install and fly.
ADVANCED SAFETY PROTECTION - Includes low voltage cutoff, overheat, and signal loss safeguards for worry-free flying.
ROBUST 30 A CONTINUOUS CURRENT - Delivers reliable power for smooth, high-performance multicopter flights.
UNIVERSAL 2 4 S LI PO COMPATIBILITY - Works seamlessly with popular 2-4 cell LiPo batteries for versatile builds.
PREMIUM BUILD WITH MILITARY GRADE CAPACITORS - Minimizes RF noise and maximizes current endurance for pro-level stability.

The QWinOut 30A Brushless ESC with SimonK firmware is a compact, lightweight speed controller designed for 2-4S LiPo-powered multicopters. Featuring pre-soldered 3.5mm female banana connectors, it ensures easy installation and reliable connections. With a continuous 30A current rating, military-grade capacitors for noise reduction, and comprehensive safety protections, this ESC delivers smooth, efficient motor control ideal for DIY quadcopters and hexacopters.

Specifications

ASIN	B07SFLJJQ5
Age Range Description	Adult
Best Sellers Rank	#450,635 in Toys & Games ( See Top 100 in Toys & Games ) #643 in Radio Control Vehicle Speed Controls
Brand Name	QWinOut
Color	30a, 4 Pcs
Customer Reviews	4.0 4.0 out of 5 stars (124)
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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268.60 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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