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> Speed Controllers > All Speed Controllers
> Speed Controllers > HobbyKing ESC
> Speed Controllers > 40 to 79 Amp
> Multi-Rotors & Parts > Speed Controller > 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 4A 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/ 4A Output
Size: 52*23*7mm
Weight: 30g


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  • Mystery 40A Brushless Speed Controller (Blue Series)

    Combo Price: $21.15   BACKORDER

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 Customer rated
Total of 144 discussions.
Gareth  2 points - 4/11/2014
This might be a stupid question, but all the wires are black and I'm not sure which wire I should connect to which color on the motor, any tips? Thanks
 madc0w 2 points
It wont matter which way they are connected up. Do the connection, test that the motor direction is correct for your application. If not, swap any two wires over :) Hope that helps
Jim  6 points - 3/15/2014
Just got my Blue 40a ESC. DIDNT see the comments here from the USA link. I was able to get the Brake to turn on/off, but cant get the Soft Start to disable. Who knows about the other settings with out a lot more testing. Seems like it shouldn't be sold as PROGRAMMABLE if it isn't. or if the methods have changed then update us!
 Dr. J 250 19 points
I just solved this last night. There are no instructions but if you first have esc unplugged then turn transmitter on and have throttle all way up then plug in esc and follow this you will figure it out. You will have to check off where you are with the tones and have a motor with prop off for safety sake. I had to turn soft on to use it in a heli 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
 Jim 6 points
Mine came with instructions, and that was never an issue. It was a fact of it not accepting the programming, not the fact I could not figure out how to do it. But the conclusion was that my ESC doesn't have a true Linear Start function. It looks to have been factory programmed with 3 soft start settings. All other functions programmed successfully. HK support was great and we got it all worked out. I do not know if my issue was isolated or not.
sanjeev.r  1 points - 2/26/2014
can i use a turnigy 3400kv 2632 bryshless motor for this esc??
 MalibuMB 7 points
Yes you can use im using this speed controler on typhoon 450h 2218h
Espen  4 points - 2/21/2014
I can confirm that the ESC can not be programmed. I tried with the Hobbyking programming card but it was completely dead. Now it does only work with the default setting.
 Dr. J 250 19 points
Sorry but it is programmable
skelator  25 points - 2/19/2014
BEWARE! new batch of these ESC can't be programmed, I have 2 of them stuck at default setting can't be change, have tried using both programming card and stick programming none of them work! better buy the mystery 40A instead of this one if you plan to use it with PLANE!
 allanQ 38 points
yup ... the firmware on this thing has been changed to dunno whatever screwed up firmware avoid !!!
 Dr. J 250 19 points
wrong it is programmable
 madc0w 2 points
Want to offer up anything helpfull there Dr, some say it isnt, you say it is..?.. whats your remedy?
 skelator 25 points
Dr. J i know it programmable but the last batch i got it won't save the setting i set to it, using stick and programming card afyer power cycle it just revert back to factory default, I have total 5 of these esc 3 of them working fine 2 of them are not the 2 are new
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.. :-)

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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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