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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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Further discounts available for registered & logged-in customers.
 Customer rated
Total of 225 discussions.
sarthakvox  12 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?
Karen  1 points - 4/12/2015
how do you turn the brake off
 Callum 50 points
You'll need a hobbyking ESC programming card like this one: PRODUCT ID: 9261000016 .
 DAJARAJA 525 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:)
Todd  1 points - 4/9/2015
is it pre sadered
 handyjap 656 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 50 points
the receiver plug is, all others aren't
 handyjap 656 points
You are correct Callum. It had a receiver plug but not battery or motor connectors.
Akash  11 points - 3/14/2015
What is the MAX mah this can handle for a 3s lipo battery?
 handyjap 656 points
A battery with "Constant Current" * "C Rating" =< 20A I would expect.
 Callum 50 points
there is no max mAh an ESC can handle as far as I'm aware.
Philip  1 points - 3/10/2015
HI, I'm a beginner with these kind of things so any help would be appreciated. I'm setting up my cc3d quadcopter and i dont know the refresh rate of these ESC's, I cant see it in the documentation either, can anyone help ? Also do i need to program these with the Tx or can I use them straight out of the box ? Thanks P
 Callum 50 points
you can use them straight out the box no problem although these are probably not the best ESCs for multirotors. If you're looking for cheap ESCs you might want to look into the multistar range or if you don't want any setting up for best performances look for the Afro speed controllers which come pre-flashed with SimonK firmware (that's could if you don't what SimonK is, a lot of people use it). I have one of these for a plane and it works fine but for multirotors I'd reccommend getting multirotor specific ESCs, the performance is just generally gonna be better. Hope this all helps (:
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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