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  Item found in the following categories;
> Speed Controllers (ESC) > All Speed Controllers (ESC)
> Speed Controllers (ESC) > Plane ESC > HobbyKing ESC
> Speed Controllers (ESC) > 40 to 79 Amp
> Multi-Rotors & Parts > Speed Controller (ESC) > HobbyKing Blue Series


HobbyKing 40A BlueSeries Brushless Speed Controller

HobbyKing 40A BlueSeries Brushless Speed Controller

Its no “Mystery” where these ESCs are made, now they are available to you at HobbyKing prices.

Built with imported N-Channel mosFET's and an ultra fast Atmel MCU & heartbeat make this a high performance ESC with excellent sync capabilities. This ESC has a 5A SBEC for solid reliable servo power.
Programmable via an R/C controller.It allows you to program all functions to fit your specific needs, which makes it efficient and user friendly.
Extremely low internal resistance
Super smooth and accurate throttle linearity
Over heat and over-load protection
Auto shut down when signal is lost or radio interference becomes severe for more than 2 seconds
Supports high RPM motors
Power arming protection (prevents the motor from accidentally running when switched ON)
New Advanced programming software
Programming features:
Brake setting (we recommend using brake for only folding props applications)
Battery type(LiPo or NiCd/NiMh)
Low voltage cutoff setting
Factory default setup restore
Timing settings (to enhance ESC efficiency and smoothness)
Soft acceleration start ups (for delicate gearbox and helicopter applications)
Governor mode(for helicopter applications)
Motor rotation( clockwise\counterclockwise)
Switching frequency
Low voltage cutoff type (power reduction orirnmediate shutdown)
Factory default settings:
Brake:  off
Battery type Detect:  LiPo with Automatic Cell
Low voltage cutoff threshold:  Medium (3.0V/65%)
Timing setup:  Automatic
Soft Acceleration Start Up:  Medium
Governor mode :  OFF
Frequency :  8kHz
Low voltage cutoff type:  Reduce power

Cont. Current: 40A
Burst Current: 60A
Battery: 2-6 Cell Lipo / 5-18 Cell Ni-XX
SBEC: 5.5V/ 5A Output
Size: 52*25*10mm
Weight: 36g


Shipped from:
International Warehouse



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 Customer rated
Total of 181 discussions.
Lee  1 points - 2/4/2016
I have been using this product for seven However, there is a problem. After kk2.0 in connection with the ARMED state, it was driving. The rotation later than the other motor. So it was tested by purchasing a "Turnigy LED Servo Tester for 4 Servo's". Other ESC operates at 110 points. However, a problem that only the ESC operates at 140 points. So replace the normal product, and was connected with kk2.0. However, it has been generated the same symptoms. The state is more than the current two products occurs. What is the problem?
 Bobo22 38 points
Lee, did you calibrate each ESC separate from the others?
Sascha  1 points - 1/2/2016
Hello, can i use this with a 12V PB Battery?
 Bobo22 38 points
Hello Sascha, I am not an expert but as far as the esc is concerned it only sees the voltage, not the chemistry behind it. This ESC would work perfect with any 12V battery as long as the battery is rated for the current.
Sascha  1 points - 1/2/2016
Hello, can i use this with a 12V PB Battery?
 Bobo22 38 points
Well, the short answer is "Yes".
Stephen  3 points - 12/9/2015
Are these pre flashed with simonk ????
 Bobo22 38 points
Hi Stephen. They are not. You would need to flash them yourself at your own risk. Doing so would void the warranty of course. If you search Internet there are a lot of info on how to flash them. Hope that helps.
Steven  1 points - 11/20/2015
Which color is the signal lead? Most SBEC's have white red black but this has orange (or yellow?) red brown. The plug goes in either way. I assume the brown goes to black but I can't find confirmation in the documentation.
 Bobo22 38 points
You are right! brown = black, red=red, orange (yellow)= white. Cheers!
Customer Reviews
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Overall Rating
8 thumbs up!
Every motor I've tried with this ESC runs VERY hot. Also my battery time is shorter. You can to better in this price range.

6 comments. Reply..

Overall Rating
5 thumbs up!
Wow, I am glad I bought this when I did! This is a fantastic speed control. I hooked it up to my new HK 450MT project and have had no problems. I haven't gotten the chance to really load it up yet, but it runs cool in hovering (test flights).

I deducted one star because it comes with no instructions. While you can build the HK 450 with T-Rex instructions, I wouldn't attempt programming the ESC with them!

Thanks again, HK!

3 comments. Reply..

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Overall Rating
1 thumbs up!
-Still Did not test it
Great Quality..... Even shipping is Good. I m from India and I ordered about .983 Kg(Total) and i received it within 11 Dayz from the date of Shipping.....Thats Great... Thankx Hobby King.. :-)

2 comments. Reply..

Overall Rating
Like it?
Good quality ESC
weight is 39.1g with XT60 plug and 3mm bullet connectors
The servo wire is long (26cm)

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Overall Rating
Like it?
Best ESC so far, will not use others for the time being. Very easy to program with the correct programming card.

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