Site Logo



Specialist in Multirotor Tech & FPV Equipment

We ship worldwide - Same day shipping on all orders placed before 4pm - FREE delivery on UK orders over £99 <1kg*

DYS BLB20A BLHeli 2-4S 20A Mini ESC with 5V 1A BEC

DYS BLB20A BLHeli 2-4S 20A Mini ESC with 5V 1A BEC

DYS multicopter parts

DYS's BLHeli series ESCs have gained a repuation within the drone racing community as being among the best value ESCs out there. Up until now all of the BLHeli series ESCs have been OPTO. Now this new BLB20A ESC includes a 5volt BEC which is pretty handy as it means you don't need an aditional BEC to power your flight controller. Like the rest of the BLHeli series, it's still tiny (not much bigger than its brother the BL20A OPTO), very light and it arrives flashed with the best multirotor firmware out there - BLHeli.

For those than don’t know, BLHeli is a next generation firmware which looks set to take over from the dominance of SimonK firmware. BLHeli offers great new features like OneShot125* and Damping Light. OneShot125, simply put is a feature that lets your flight controller communicate with your ESCs much faster; the result being your multirotor can respond much quicker to commands. On the other hand Damping Light is a sort of active breaking. With normal ESCs when you reduce the throttle, the motor will only be slowed down passively by the drag of the props. With Damping Light enabled, the ESC will act like an electronic brake to actively reduce the motor speed. Again, this feature makes for a much more responsive and stable multirotor. While OneShot125 and Damping Light are the killer features of BLHeli, there are other benfits. For example, you can configure the ESCs to sound a beacon if they sit idle for 10minutes, which might just help you find your racing quad if you crash it in a field of long grass. The ESCs can be flashed with the latest version of BLHeli or Simonk using the DYS USB Linker.


  • Designed specifically for multirotors
  • 5volt 1Amp BEC to power FC
  • Tiny form factor and low weight
  • Preloaded with BLHeli, OneShot125 & Dampened Light (active braking) supported
  • Fast throttle response – high 500Hz maximum refresh rate compatible with all flight controllers
  • Feature all new ultra-low resistance MOSFETs for superior current handling
  • Thick PCB for better heat dissipation
  • High performance capacitor filter

*Your flight controller must support OneShot to take advantage of this feature.

For more information about BLHeli, please refer to the BLHeliSuite website.

  • Model: BLB20A
  • Battery: 6-16.8V (2-4S Lipo)
  • Current Rating: 20amp / 22amp burst
  • BEC: 5volt 1Amp
  • Signal frequency: 20-500Hz
  • Outout PWM frequency: 18KHz
  • Firmware: BLHeli (also compatible with SimonK)
  • Size: 26.5x13.5x4.5mm
  • Weight: 8g


  • 1x DYS BLB20A

None Available

Add new comment

Sorry, we don't currently have any product related advice for this item. For general tips, tutorials and help please check out our Multirotor Beginner's Guide. Alternatively feel free to ask us a question.

UK Express Shipping - Next Day Delivery on orders placed before 4pm

All information relating to shipping and delivery is stated here. Should you not find what you are looking for, please contact us.

Shipping costs are calculated once items have been placed in your basket during checkout. 

UK Postage: Here at Flying Tech we process orders Monday to Friday and pride ourselves on our quick turnaround of orders. If stocks levels allow, we aim to dispatch orders placed before 4PM the same day with Royal Mail. Our cut off time for courier delivery is earlier; orders must be placed by 2PM for next day delivery with DHL and 1PM for next day delivery with APC. A confirmation email will be sent when your order has been dispatched. If you wish to change your order, please contact us promptly, as we won't be able to make amendments once the order has been shipped.

We are partnered with several delivery companies including Royal Mail, DHL, APC and Parcel Force. If you have a special delivery requirement or would like to arrange a shop collection please contact us. For small low value orders our cheapest delivery service is Royal Mail First Class; this service aims to deliver the next working day including Saturdays and it can be sent recorded for extra peace of mind – please note this is not a guaranteed next day delivery or trackable service.

For a guaranteed next day delivery we recommend Royal Mail Special Delivery or one of our courier delivery options. Royal Mail Special Delivery will arrive by 1PM the next day and for an extra fee can be delivered on Saturdays. APC Overnight offers next day delivery with full tracking and a 2hr time slot pre-delivery text notification. DHL is a good option for larger consignments and remote locations such as Northern Ireland and Isle of Man. All high value orders are fully insured and will likely require a signature on delivery.

FREE shipping in the UK on orders over £99 (this is a signed for service and insured to a maximum of £40). Please note that the offer only applies to orders with a total weight under 1Kg and that a few products are exempt from the offer.

We Ship Worldwide

International Postage: We are based in the UK, but ship to most worldwide destinations. Postage rates are calculated by the weight and shipment location, the price is quoted during the checkout. Low value order can be sent by Air Mail, but are not insured. Higher value, heavy goods will be sent with DHL or an alternative courier. Orders shipped outside the EU may be subject to customs charges. These charges are additional to any delivery costs and will need to be paid by the recipient.

Flying Tech International Shipping with DHL Express

For our international customers who require a rapid delivery we off a DHL Express service. DHL Express offers NEXT DAY delivery to most European destinations and a very fast delivery for countries further afield, generally 2-3 days. For country specific estimated transit times, please refer this download.

We reserve the right to modify, remove or add to any of these services at any time. We endeavour to ship all items as fast as possible. If you would like an alternative shipping arrangement to be made please contact us.

Our Delivery Partners:
Royal Mail DHL APC Deutsche Post Parcel Force


APC Overnight Next Day Delivery