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Racerstar RS20A V2 Blheli_S OPTO 2-4S ESC

Racerstar RS20A V2 Blheli_S OPTO 2-4S ESC


Availability: In stock

SKU: Racerstar-RS20A-V2-New-20A-Blheli_S-OPTO-2-4S-ESC

Suited for high-performance racing!



Racerstar have come out the gate with this 20A high-performance ESC, this also will support Oneshot42, Multishot and Dshot600. Racing with these ESCs is another level, you will feel the difference in quality, especially for the price! This lightweight ESCs will not only increase your power but will also decrease the weight of your FPV Drone, weighing in at only 5.67g. Along with it's extraordinary power to weight ratio comes the beacon functionality, where the ESC will start beeping after a given time of zero throttle. This can be very useful for finding lost crafts.


  • - Chips on EFM8BB21F16, 48MHZ Greatest .
  • - BLHeli_S is designed for superior performance in multirotors, and uses hardware generated motor pwm for smooth throttle response and silent operation.
  • - Small size combined with light weight for easy installation.
  • - The code supports regular 1-2ms pulse width input, as well as Oneshot125 (125-250us), Oneshot42 (41.7-83.3us) and Multishot (5-25us), 16.42 D-shot.
  • - The input signal is automatically detected by the ESC upon power up.
  • - All codes use damped light mode.Damped light does regenerative braking, causing very fast motor retardation, and inherently also does active freewheeling
  • - The code supports features to prevent sync loss. There are tuneable parameters that can make the code run well even in the most demanding situations, although default settings will work
  • - excellently in normal operating environments

What's Included?

  • 1 x Racerstar RS20A V2 New 20A Blheli_S OPTO 2-4S ESC

Technical Specification

Additional Information

Technical Specification

Recomended frame size100, 120, 150

Constant Current 20A
Burst Current 25A
Input Voltage 2-4S
Programming Yes
Firmware Blehli_S
Weight 5.67g
Dimensions 28*12mm

Why Choose Us?

Customer Service & Care

There are multiple reasons you should purchase from us so let's start with our customer service, for this, we can refer to our trust pilot review page. You'll see many reviews about our company all but a few that are praising us for our customer service. All orders shipped out the same day, so you get it as soon as possible. Also, our after sales care is second to none, we do keep in contact with our customers to see how they are getting on with the new item they have purchased. Don't forget to mention we do repairs and servicing, so at all costs, we try to keep the customer happy with the services we provide. If you would like to look at our trust pilot reviews to see how other people found their experience purchasing from us go to Trustpilot/RCLegends

Still Unsure?

You can visit our showroom and have a chat with us and maybe walk away with your purchase when you're here, we will inform you on all the best new gear coming out if you don't have the time to keep up to date with the drone community. We will never try and force you into buying anything, we always try to give the best advice whether that's on the phone or in person.

We pride ourselves on giving great customer service, therefore we decided to get feedback on our services. We have now accumulated over 100+ Great reviews that new users can see. We love to know our customers are happy with what they've purchased and we can always give tips on anything you ask.

From Amazon to eBay, we use multiple 3rd party channels for retailing products. We have fulfilled orders from all over Europe and customers have given positive feedback. We have a 4.5-star rating, as well as 99% positive feedback. One of the biggest Drone sellers on Amazon with little negative feedback

Our eBay channel is where we started. We now have one of the highest feedback scores for any Drone retailer. We ship to all over Europe and have sold over 2,000 items alone on eBay. We respond to any queries you have within 24hrs and we are always on time with shipping.


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