Please confirm your location:

USA warehouse now open.
Our USA warehouse is now open! Low cost shipping and an ever growing variety make ordering from the US warehouse even better value!
  Item found in the following categories;
> Speed Controllers > All Speed Controllers
> Speed Controllers > HobbyKing ESC
> Speed Controllers > 20 to 39 Amp


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.


This product available from a warehouse near you!

Weight: 47g
International Warehouse
USA West Warehouse In Stock View Item
USA East Warehouse In Stock View Item
Price  $9.99

  • Turnigy 4mm Heat Shrink Tube - RED (1mtr)

    Combo Price: $0.21   IN STOCK

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

    Combo Price: $1.69   IN STOCK

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

    Combo Price: $2.91   IN STOCK

  • Turnigy 4mm Heat Shrink Tube - BLACK (1mtr)

    Combo Price: $0.21   BACKORDER

  • Soldering Iron 230V 80W w/ Spare Tip

    Combo Price: $3.95   IN STOCK

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

    Combo Price: $3.75   IN STOCK

  • HobbyKing ESC Programming Card

    Combo Price: $6.15   IN STOCK

Further discounts available for registered & logged-in customers.
 Customer rated
Total of 423 discussions.
john  7 points - 3/25/2015
I have just received these from the latest stock at UK warehouse, they are refusing to flash Simonk firmware using the HK flash tool, previously i have had no problem flashing them. I am getting the error message that the chip is not responding .Have they been locked.?
 TANDEM 6 points
Try to enter the programming mode , in part files you find you need to do
Kardo  1 points - 3/24/2015
Hi, I have purchased one of these ESC as an upgrade for my AXN Floater Jet 4x Hextronik HXT900 servos. Now I have a problem with the servos, they worked first properly, but now when i connect the battery, only motor works. I hear a noise coming out the servos. Is there any solution or help? Is the ESC dead?
Jonathan  1 points - 3/24/2015
I'm assuming these don't come flashed with anything, correct?
Don Stamper  7 points - 3/19/2015
I having problems programming it with Transmitter. I think something is wrong with this one since the volume of the tones is so low I can barely hear it. When I get to the beep sequence to turn the brake on and move the throttle stick down I get two tones as if it accepted the command however it will not change the function the next time I turn it on to try it. I have used the manuals in the files tab and also found a video for several esc*s but not this exact one. thanks, Don
Sartech  20 points - 3/19/2015
I'm using this ESC for one of my Robotics projects. I'm running it using an Arduino. It used to run the motor in both the directions out-of-the-box. However I ran some calibration code after which it has stopped working in the reverse direction. Can anybody tell me how do I calibrate it for a bi-directional drive?
Customer Reviews
Create an account
Overall Rating
Like it?
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..

Overall Rating
Like it?
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

1 comment. Reply..

Overall Rating
Like it?
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. :)

No comments. Reply..

Overall Rating
Like it?
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

1 comment. Reply..

Create an account
Overall Rating

Like it?
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.

2 comments. Reply.. here to see all reviews
Aff. Link