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  Item found in the following categories;
> Speed Controllers > All Speed Controllers
> Speed Controllers > HobbyKing ESC
> Speed Controllers > 20 to 39 Amp


Hobby King 20A ESC 3A UBEC

Hobby King 20A ESC 3A UBEC

Constant Current: 20A
Burst Current: 25A
Battery: 2-4S Lipoly / 5-12s NiXX
BEC: 5v / 3A
Motor Type: Sensorless Brushless
Size: 54 x 26 11mm
Weight: 30g

Programming Functions:
Battery Type: Lipo /NiXX
Brake: On / Off
Voltage Protection: Low / Mid / High
Protection mode: Reduce power / Cut off power
Timing: Auto / High / Low
Startup: Fast / Normal / Soft
PWM Frequency: 8k / 16k
Helicopter mode: Off / 5sec / 15sec (Start up delay)

User manual can be downloaded from the files Tab.


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Weight: 45g
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Price  $8.00

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 Customer rated
Total of 226 discussions.
tjPritts  6 points - 5/1/2015
HELP! I am trying to get these ESC's to work with the HK megaPilot (Pixhawk). The ESC's calibrate fine with fine linear response, but when I run them through my Pixhawk they lose are their sync and are un-useable.
 Marco 5 points
hi have you disconnected the becs as that is a problem i have had
 OwlPic 45 points
We have had strange problems, the solution was where the transmitter mixing caused improper ESC signals on power up. In some cases it sent the ESC into program mode, so by the time we lowered the throttle level we now had a non-functioning ESC. Also the default parameters don't seem to be the same as a virgin ESC.
sarthakvox  15 points - 4/24/2015
Can this ESC be flashed with "Atmel Atmega Socket Firmware Flashing Tool " ? And which SimonK firmware would be best to flash it?
 majik01 7343 points
Yes it can ...
Karen  1 points - 4/12/2015
how do you turn the brake off
 Callum 61 points
You'll need a hobbyking ESC programming card like this one: PRODUCT ID: 9261000016 .
 DAJARAJA 536 points
hi Karen,you can get a programming card but you really don't need it.go to files and download manual =start reading operation V.when you set programming mode you just have to wait until you hear the sequence tune is played for brake off(then pull throttle stick back to lowest point to set it).remove propeller from plane first before you start programming esc.dont cred happy to help good luck:)
 oldkid flite 10 points
Is'nt the (defalt ) settting brake off
Todd  1 points - 4/9/2015
is it pre sadered
 handyjap 666 points
The ones I received did not have any connectors soldered to the cables. I had to add the XT60 for battery and bullet connectors for motor.
 Callum 61 points
the receiver plug is, all others aren't
 handyjap 666 points
You are correct Callum. It had a receiver plug but not battery or motor connectors.
Akash  12 points - 3/14/2015
What is the MAX mah this can handle for a 3s lipo battery?
 handyjap 666 points
A battery with "Constant Current" * "C Rating" =< 20A I would expect.
 Callum 61 points
there is no max mAh an ESC can handle as far as I'm aware.
 SigiK 550 points
An ESC is rated for A, not for mAh. It starts with the motor A. The number of A the motor draws needs to be smaller than the A the ESC is rated for. The battery needs to be able to supply the required A. It works like this: say you have a 3s 2200mAh 20C battery. It is good to deliver 2.2x20 = 44A continuously. Be aware that the motor A change with the size of the fitted propeller.
Customer Reviews
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Very nice esc.Good throtle respone.Thanks hk.

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Szcs Zoltan
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Kny kis helyen is el fr s az ra is j!!!

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Nice, I have ordered 30A one, and received it, now waiting for this one. Nice esc for the price, really. :)

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akin agrag
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dragon cn deal thank hk

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Great product, I am almost two years and never had problems, mine is down to the water and returned to work.

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