EMAX 12A BLHeli Electronic Speed Controller

EMAX 12A BLHeli Electronic Speed Controller
Price: $8.99
In Store Only
Read Reviews
Write a Review
This item is only available for purchase exclusively from our retail stores. Click here to find a store near you. You may want to search our site for a similar item.
Check Store Availability
Please be aware that pricing and product availability in-store may vary from what’s available online because each store is independently owned and operated.

This is an EMAX 12 Amp BLHeli ESC, intended for Airplanes, Helicopters, & Multirotors.  


  • BLHeli Firmware for ease of use, and crisp throttle response
  • Low voltage protection
  • Over temperature protection
  • Self-check functions
  • Separate power supply for MCU and BEC, enhancing the ESC's ability of eliminating magnetic interference
  • Parameters of the ESC can be adjusted via BL Heli Suite
  • Throttle calibration possible through Transmitter, BLHeli Suite, Baseflight, and Cleanflight
  • Equipped with built-in linear BEC
  • Max speed: 210,000 RPM for 2-pole, 70,000 RPM for 6-pole, 35,000 RPM for 12-pole

Input Voltage: 1-4 cell, 1s-4s LiPo
Constant Current: 12 Amps
Burst Current:
15 Amps
Dimensions (LxWxH): 26x20x7mm
Motor Wire Length:
47mm, 20awg
Battery Wire Length: 72mm, 20awg
Throttle Wire Length: 257mm
ESC BEC: Built-in Linear BEC
BEC Output: 1A/5V
Weight (including wires): 10g
Programmable: Yes

This product was added to our catalog on January 28, 2016

Verified Owner
Tuesday, Jun 12 2018 (about 3 years ago)
EMAX 12A BLHeli Electronic Speed Controller
First off, let me start by saying that Amain hobbies is a great place to do business with.

As for the EMAX ESC, I was very disappointed. I purchased two of these devices. On the plus side, they were the perfect form factor for my project. The first ESC I installed seemed to work fine, it calibrated ok, it throttled up fine, but after about 30 seconds of runtime, it cut out and reset. I checked my setup, and tried again, same thing. Tried one more time and the controller burst into flames. Not expected behavior.

Ok, I can see that maybe it was just a defect controller, so I replaced it with the second one. Checked the connections, Calibrated it, throttled it up, and it seemed to work. Tried to go flying. Throttled it up, took off and the controller cut out again and reset. It did the same thing as the first, without the flames this time.

Just to make sure I wasn't doing something wrong, I swapped the controller with another manufacturer (US). The plane works fine and I'm still flying with the other(US) controller.

I really can't recommend this ESC based on my experiences. I bought it because it was inexpensive and it was recommended, I guess you get what you pay for. Sorry.

Saturday, Apr 27 2019 (about 2 years ago)
EMAX 12A BLHeli Electronic Speed Controller
I got 2 of these, bolth work fine. One is on a mighty Mini Corsair with FT Radial 1806 motor, running 3 and 4s, powering 4- 3.7g servos no issues there, but on 4s with Gemfan 6x6 2 blade prop the esc must go into thermal protection mode, because after about 30sec of flight the throttle output is reduced to less than half.
The second is on a custom half sized FT Explorer with a no brand 1806, running 2 and 3s, but only powering 2- 2.5g servos with no issues. I think they are great escs as long as you don't ask to much from them.
Verified Owner
Friday, Nov 16 2018 (about 2 years ago)
EMAX 12A BLHeli Electronic Speed Controller
Same issues as other reviews. ESC goes into "brownout" (resets) when I hook up more than one 9g servo (even with motor removed). Replaced with eflite ESC and the plane works great. Cannot recommend this ESC
Verified Owner
Saturday, Nov 10 2018 (about 2 years ago)
EMAX 12A BLHeli Electronic Speed Controller
I would have to say that Emax is a good brand but I would not recommend this Esc I don't know if it's a hit or miss kind of deal but unfortunately mine was unfortunately a disappointment I purchased this for my ft mini Scout. When I took it out for its first flight I happen to notice as soon as I gave it power and hand launched the plane as soon as I went to put lift in the elevator the ESC shut off completely and reset. Causing you guessed it my mini scout to go straight down into the ground good thing the motor was still ok the prop was not broken surprisingly. And of course the mini Scout was still in one piece. I checked my connections and made a second try unfortunately the second and third attempt resulting in the same thing. Only the third crash the ESC stopped working completely when I took it inside to evaluate everything I noticed that my receiver stopped working for some odd reason good thing I have a spare. At first I thought the motor was done too but after doing some tests it's working fine. And again I don't know if it was because I was using a futaba 72 megahertz 4-channel radio with a Futaba micro receiver and servos but I don't think that was the case. So over all this ESC has me stumped I went ahead and ordered a different one from a different website. So overall no fault on flitetest's end. On a lighter note I still have my plane my servos a spare receiver and my motor and props plus battery I just have to wait for my new ESC to arrive. So overall you can take a chance with this Esc but I wouldn't recommend it.
Saturday, Jul 21 2018 (about 3 years ago)
EMAX 12A BLHeli Electronic Speed Controller