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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 Quantity: 
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 Customer rated
Total of 210 discussions.
Chris  5 points - 9/2/2014
Thanks for the advice, I also eventually got it to work with a slightly different procedure. I reduced the throttle trim tab down to minimum (it was at the middle position before), then went through the usual procedure. I lowered the throttle to minimum after the second 4 beeps, and left it for a longer time before powering down the ESC. It still did not return to operating mode until after I power cycled the ESC, but this time the brake was on. I think maybe it was the throttle trim position that made the difference. I have noticed that some ESC's have a different throttle zero position when they power up (on one Birdie unit I have the throttle comes on at about 10% when the throttle trim tab is at the middle position), so maybe it depends on the transmitter as well. I am using a Spectrum DX5e in this case.
Chris  5 points - 8/22/2014
Anyone have any success in programming this thing using the transmitter? I followed the instructions in the manual to turn the brake on, and it seems to be working (i.e., cycles through the tones for each setting and gives the confirmation tone when the throttle is lowered as described in the manual) but does not return to operational mode after the confirmation tone. If I cycle the power to the ESC it works again, but all settings are default (no brake). I have two of these and they both behave the same, so it must be an issue with the programming procedure. Any ideas?
 Scott 1 points
I have the same problem! Can anyone help?
 Scott 1 points
Ok I found the problem. On the first set of 4 beeps return throttle to 0% to calibrate the ESC so it knows what 0% is! Then try the brake. If it still does not work, go back into program mode and on the second set of 4 beeps move the throttle stick to zero to enable the brake! took me hours to figure this out! But I am a noob!
ashwin  7 points - 8/11/2014
yes it will work hope it helps
 Mosa 98 658 points
Try replying under the question rather than starting a new Q.
Ho  1 points - 8/11/2014
Anyone knows if a Zippy flightmax 1300mAh 3s1p 20c will work?
 Mosa 98 658 points
ASHWIN* yes it will work hope it helps.
ashwin  7 points - 8/10/2014
mine worked well for 3 months but one of them is not working its does not have high amp draw and it glitches so i will use a 30A one now. dt 750.
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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