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  Item found in the following categories;
> Speed Controllers (ESC) > All Speed Controllers
> Speed Controllers (ESC) > Plane ESC > HobbyKing ESC
> Speed Controllers (ESC) > 20-39A


Hobby King 30A ESC 3A UBEC

Hobby King 30A ESC 3A UBEC

Constant Current: 30A
Burst Current: 40A
Battery: 2-4S Lipoly / 5-12s NiXX
BEC: 5v / 3A
Motor Type: Sensorless Brushless
Size: 54 x 26 11mm
Weight: 32g

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.


Shipped from:
International Warehouse



  • PolyMax 3.5mm Gold Connectors 10 PAIRS (20PC)

    Combo Price: $1.69   IN STOCK
    Add to Cart

  • HXT 3.5mm Gold Connector w/ Protector (10pcs/set)

    Combo Price: $2.91   IN STOCK
    Add to Cart

  • Soldering Iron 230V 80W w/ Spare Tip

    Combo Price: $3.95   BACKORDER
    Add to Cart

  • Nylon XT60 Connectors Male/Female (5 pairs) GENUINE

    Combo Price: $3.75   IN STOCK
    Add to Cart

  • HobbyKing ESC Programming Card

    Combo Price: $6.15   BACKORDER
    Add to Cart

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Estimated factory delivery date;
 Customer rated
Total of 454 discussions.
TIMMAAHY  5 points - 9/20/2016
How do I get these esc's to calibrate to my radio? The instructions don't say anything about setting up throttle.
 Gary49 4596 points
This is in the instructions that I found. Setting Method: 1. Open the transmitter, switch throttle stick to the full power position (for FUTABA series transmitter, the throttle stick shall be switched to REV). 2. Connect the receiver and motor. 3. Connect the power to the speed controller. 4. If the transmitter is in normal condition, it will have the following sound: (if there are no more sounds after a long low sound at the end of this sound, check the reverse setting of the transmitter throttle channel). ? B: indicates LIPO automatic protection ? BB BB: indicates NiMH/NiCD automatic protection ? BBB BBB: indicates brake selection 5. If there is setting you want in the process of sound cycle, switch the throttle stick, to the lowest position at the first time interval. (For example, select LIPO automatic protection: switch the throttle stick to the lowest position when hearing one B sound) 6. If there is another additional setting, quickly switch the gun to the highest position to make a selection.
 TIMMAAHY 5 points
I understand how to program them, I got that part down. What I am talking about is calibrating the esc to the throttle of the radio. Normally on most esc's you have to hold it at full throttle until it beeps then move it to full brake (or the stick all the way down until a beep and then to neutral until a beep is heard. I am trying to use these in a boat with a surface type pistol grip radio. when I plug them in they will not do anything until I move the throttle to brake about an 1/8th of an inch then they will beep and work but if I let go of the throttle they will automatically start running when they should be in neutral. So I need to calibrate the throttle range, but the manual does not show this .
 Gary49 4596 points
I do not think you can actually calibrate the throttle on these speed controllers to do what you are after, they have been designed more for an aircraft/helicopter style radio where this is not an issue. You would be better buying something that is more suitable for marine use where you have a neutral/forward and reverse or brake.
 TIMMAAHY 5 points
Thanks Gary, after messing around with these two esc's for a few days trying to get them to read neutral I was about ready to give up, but then I thought of something that I thought I would try. I'm putting it up here in case anyone else runs into this issue they will know how to get them to work. Once I thought about it it was really easy. All that is needed is to remove the two springs from the throttle on the pistol grip radio and then attach a spring or both if you choose so that when you let go of the throttle trigger the trigger goes all the way to full brake! It's pretty easy to find a place to hook the spring onto. Now the esc's work just like they should!!!
Dmitrii  2 points - 7/14/2016
This ESC can start without bim-bim-bim? (instantly start, then take -)
frank  1 points - 6/5/2016
hello does the ecm wokr with the mustang P 51 brushless motor ? mine is damaged and it is a 10 A one. but noth to find in the list. Any ideas ? thx Frank
George  10 points - 5/29/2016
Compatible with the Turnigy programming cards?
Andreis Gustavo  4 points - 4/11/2016
Can you tell me when it is going to be in stock in the International Warehouse? Have been waiting for some time now :/
 Philipp 7 points
It´*s in stock now
Customer Reviews
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Overall Rating
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excellent cheap ESC, exactly as described, easy to program with TX and very good throttle response. I'm using it with a 4200kv outrunner and 3s lipo with 64mm EDF, great setup!. thanks HK

4 comments. Reply..

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Picked this up a week or so ago the unit came in perfect condition. programming was not required as it worked configured out of the bag. it would be beneficial to have a detailed spec sheet on beep config packaged w eack hk unit sold rather than hunting online or waiting for someone to post. would buy or reco again

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I have bought this and receivied few days ago. It was well packed. I had 1 flight with it, and it was good. No problems occured during the flight. After flight it was barely hot. I recommend this esc, because it's possible to program, and it has good price/quality ratio. :)

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Good quality and well built, pre progged from box with generic settings, but easily programmed from TX. Bang on the mark for a speed controller

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It is worth spending the extra dollar or so to have the 3.5 mm connectors already on these esc's. This was money well spent and can handle the rated 30 Amps.

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