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  Item found in the following categories;
> 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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Weight: 49g Quantity: 
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  • Mystery 40A Brushless Speed Controller (Blue Series)

    Combo Price: $21.15   IN STOCK

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 Customer rated
Total of 150 discussions.
Thomas  1 points - 7/29/2014
Thanks very much for the reply* learning is a constant curve Tom
 OldFartFlyer 1457 points
Another point, four of these will weigh around 125gm. try to keep your airframe light.
Thomas  1 points - 7/27/2014
Hi All, I've been working with a Ladybird v2, and the little bug seems to have bitten. In the future I plan to build a quadcopter based on 35 size motors. My question is: would this speed controller be suitable for a quad? I'm still in the process of figuring out who shot john here. Thanks, Tom G
 OldFartFlyer 1457 points
Thomas, this is a reliable ESC which I use in a number of models. It is versatile and allows for lots of adjustment. However, there are many features that you won't need in your application. I would be looking for a simpler ESC which would obviously cost less.
menandro  3 points - 7/17/2014
Comprei um esc de 50 A da Mistery qual sera o cartã*o de programaç*ã*o compativel com ele
siffup  14 points - 6/28/2014
Can anyone tell me, what inductor that is?
 siffup 14 points
 OldFartFlyer 1457 points
Hi, Siffup. The quality of the answers you get will be relative to the quality of the questions asked. I struggle to understand what you are asking. Could you be more precise? Perhaps if you want to know the complete specifications of all components, the grade of solder used, etc, the best source of information would be direct to customer services who can access the manufacturer. This is more a discussion forum of customers and users. We don't make 'em - we fly 'em!
 siffup 14 points
Have you seen the picture? The inductor with the 220 on, is it a regular 220µ*h? Wher to get the schematics for the 40a?
 OldFartFlyer 1457 points
Hi siffup. I can't zoom the pictures but I've made a bit of a guess and have checked over two of my five of these ESCs. The others are embedded in aircraft! I had toi use a magnifying glass. To be certain, I would have to remove the clear heat shrink to eliminate the reflections and slightly separate the components to better read the spec. I'm not willing to dissect. However, it appears to confirm yes, regular.
Jalex  6 points - 5/29/2014
Hi, I´*m using 2 of these units. Does somebody know the which is the UPPER OPERATING TEMPERATURE for a continuos use, before the High Temp protection activates ???? Thanks a lot , your answers will be very much appreciated !!
 OldFartFlyer 1457 points
The specification is for 110 deg C, at which time the ESC will reduce output power. It will also cut power to the motor is it detects a loss of throttle signal greater than 2 secs. To keep the ESC operating cooler you can do two things. First, select a switching frequency of 16kHz (a programming card will not do this - use your Tx) Next, experiment with timing - if you are not always on full throttle then regardless of poles etc an outrunner configured to lower timing will generate less heat through the motor system provided your aircraft is okay with the slight drop off in power and you'll find your flights last longer.
 Jalex 6 points
Hi...thanks for your answer.. Where to get the right instructions ( complete manual ) for reliable tx settings with this ubits ???? Mine came alone, no manual, no instructions..
 Jalex 6 points
Just found and uploaded the instructions for this esc in the files section.
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)

2 comments. Reply..

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.

1 comment. Reply.. here to see all reviews
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