SKU: 35015692252

40A Brushless ESC BLHeli_S Firmware Speed controller for Multicopters Drones MT40A-OPTO-BK2

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Ships within 48 hours · Estimated delivery Sep 9 - Sep 14

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Description

40A Brushless ESC BLHeli_S Firmware Speed controller for Multicopters Drones MT40A-OPTO-BK2BLHeli_S firmware is the next generation code, following the base BLHeli code. BLHeli_S is designed for superior performance in multirotors, and uses hardware generated motor pwm for smooth throttle response and silent operation. All codes use damped light mode. Main features: Hardware PWM smoother and more responsive motor response; Always use damped light (Regenerative Breaking) for better multicopter control; Code supports sync loss prevention

BLHeli_S firmware is the next generation code, following the base BLHeli code.  BLHeli_S is designed for superior performance in multirotors, and uses hardware generated motor pwm for smooth throttle response and silent operation. All codes use damped light mode.

Main features:

  1. Hardware PWM – smoother and more responsive motor response;
  2. Always use damped light (Regenerative Breaking) for better multicopter control;
  3. Code supports sync loss prevention – tuneable parameters to make your ESC work well in the most demanding applications (not just FPV racing);
  4. High resolution throttle steps;
  5. Supports Oneshot125 (125-250us), Oneshot42 (41.7-83.3us), Multishot (5-25us) protocols;
  6. Automatically detects input signal protocol on ESC power up;
  7. Beacon Function – your ESC will start beeping after a set time of zero throttle to help you find your quadcopter.

Specifications:

 

Model NO.:  MT40A-OPTO-BK2 with BB2 MCU

Firmware.........................................   BLHeli_S firmware

Cont.Current ...................................  40A

Burst Current ................................... 45 A

BEC..................................................  None

Lipo...................................................  2-6cells

Net Weight ........................................ 11g

Size....................................................  34*16mm

Shipping Notes
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 35015692252

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4.1 ★★★★★
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Isaac Juha
Fort Morgan, US
★★★★★ 2
Too big
Size: Compatible with 2003-2006 BMW E46 3-Series Coupe, Color: Glossy Black M-Color, Size: Compatible with 2003-2006 BMW E46 3-Series Coupe, Color: Glossy Black M-Color
Ordered for a 03 325ci it was huge looks like an m5 grill. Nice quality good design but too big.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 20, 2023
M
Verified Purchase
Michael
Phoenix, US
★★★★★ 5
Easy install
Color: Single Slat Gloss Black, Size: 2012-2018 F30, Color: Single Slat Gloss Black, Size: 2012-2018 F30
Fixed my busted grille and gave the car a newer look. 2014 320i
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 2, 2026
S
Verified Purchase
Sal
Los Angeles, US
★★★★★ 5
Direct Fit and good quality
Color: Single Slat Gloss Black, Size: 2002-2005 E46
For anyone that has owned an E46 knows that even the stock kidney grills are brittle plastic. This aftermarket is about the same quality as stock. It is a direct fit and has the clips where they are supposed to be to keep them in place. The look is also pretty nice. This one is all black and actually looks nice on my black E46. I would recommend especially for the price and shipping was fast.
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Reviewed in the United States on August 29, 2025
C
Verified Purchase
Christian Burt
Grantham, US
★★★★★ 5
Easy install
Color: Single Slat Gloss Black, Size: 2023+G20
Fits well. Made of plastic but very easy install.
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Reviewed in the United States on March 19, 2026
M
Verified Purchase
Mecha Drew
San Leandro, US
★★★★★ 1
I should have read all the other reviews ...
Color: Single Slat Gloss Black, Size: 2010-2013 E92, Color: Single Slat Gloss Black, Size: 2010-2013 E92
I read all the bad reviews, but I gave it a shot anyways Tabs wont clip in place and fitment is slightly off.
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Reviewed in the United States on May 1, 2026

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