FRSKY Neuron 40a Telemetry Brushless ESC
The FrSky Neuron Series ESC is a professional grade control unit, integrated with built-in telemetry like high-precision current sensor, voltage sensor, motor RPM, power consumption and ESC temperature sensor. Features optional DShot signaling and an adjustable SBEC voltage, that can be changed via LUA script. The Neuron ESC is encased in a CNC aluminum protective shell which also aids in heat dissipation. As with most FrSky products, the Neuron series is completely S.Port compatible, allowing you to use our full line of S.Port Telemetry sensors.
 
Specification
Dimension: 59*33*17mm (L×W×H)
Weight: 58g
LiPo Cells: 3~6S
Adjustable SBEC Voltage: 5~8.4V (Voltage Step: 0.1V)
Cont. Current: 40A
Peak Current: 60A
 
Features
Smart Port enabled and telemetry data transmission supported
Telemetry data for ESC: Voltage, Current, RPM, Power Consumption, Temperature.
Telemetry data for SBEC: Output Voltage, Current.
High performance 32-bit micro-processor
High-precision current sensor ACS781KLRTR-150U-T (Resolution 125mA, Precision ±2%) and ACS711KEXLT (Resolution 50mA, Precision ±2%)
Over-temperature and over-current protection
SBEC supports 7A@5~8.4V (adjusted through LUA or through FreeLink App with Airlink S)
 
Why We Recommend This
The Neuron 40A ESC is the clean integration choice for FrSky builds — native FBUS telemetry means RPM, motor temperature, current draw, and ESC voltage all appear live on your Tandem or ACCESS radio without a separate sensor, and the Smart Port interface means zero extra wiring. FPV Builds RC provides U.S.-based product support and setup guidance for FrSky products purchased through our store.
Frequently Asked Questions:
 
What makes the Neuron 40A different from a standard brushless ESC?
The FrSky Neuron 40A has built-in S.Port telemetry, allowing it to stream real-time current, voltage, RPM, and temperature data directly to your FrSky transmitter via the receiver's S.Port connection. A standard ESC has no telemetry output. This integration eliminates the need for a separate current sensor on builds where the Neuron ESC is installed, since all power system telemetry comes from the ESC itself.
 
Which motor sizes and aircraft is the Neuron 40A suited for?
The Neuron 40A is rated for up to 40A continuous current and is well-suited for sport and aerobatics aircraft with motor sizes in the 2200–3500 KV range on 3S–4S packs. It covers most mid-size fixed-wing models, EDF jets with smaller fan units, and 3D aerobatics planes. For larger aircraft requiring higher current, a higher-rated ESC would be needed.
 
How do I set up telemetry from the Neuron 40A with my FrSky receiver?
Connect the Neuron 40A's S.Port wire to the S.Port port on your FrSky receiver. On a Tandem X18 or X20 series transmitter running ETHOS, the ESC's telemetry fields (current, voltage, RPM, temperature) will automatically appear in the telemetry sensor list once the receiver is bound. Add them to your home screen in ETHOS and configure audio alerts for voltage or current thresholds as desired. Browse compatible receivers at https://www.fpvbuildsrc.com/frsky-receivers.
 
What is the BEC output of the Neuron 40A?
The Neuron 40A includes an integrated BEC (Battery Elimination Circuit) that provides regulated power to your receiver and servos. The BEC output voltage and current rating are specified in the FrSky Neuron 40A documentation. Confirm the BEC output is sufficient for your receiver and servo load before flying, particularly on aircraft with multiple digital servos drawing higher standby current.
 
Which FrSky receivers is the Neuron 40A compatible with?
The Neuron 40A connects via S.Port and is compatible with all FrSky receivers that support S.Port telemetry, including Archer Plus, TD Tandem, and TW Twin models. For FBUS-only builds, note that the Neuron 40A uses S.Port for its telemetry output. Browse all compatible receivers at https://www.fpvbuildsrc.com/frsky-receivers.
 
Can I program the Neuron 40A ESC?
Yes. The FrSky Neuron ESC series supports programming for motor timing, brake, throttle calibration, and other parameters via the FrSky Neuron configuration app or via transmitter stick programming. Full programming documentation is included with the ESC and available from FrSky's official resources.
 
Does FPV Builds RC offer setup support for the Neuron 40A ESC?
Yes. FPV Builds RC is a U.S.-based FrSky dealer and can assist with ESC setup, S.Port telemetry configuration, and ETHOS screen layout. Contact us through the site for guidance on your specific aircraft build.