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40 Amp Brushed Smart ESC/RX

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Upgrade your brushed motor-equipped models to Spektrum Smart Technology with the Firma Smart 40 Amp Brushed ESC. Get the valuable battery and ESC telemetry data easily and in real-time right on your Smart-compatible Spektrum transmitter — including motor current, input voltage, remaining battery capacity, and other information that will help endurance RC trailers increase efficiency and extend battery life and run time.

Built with Crawler and Scaler models in mind, the Firma 40 Amp Brushed ESC features a waterproof and dustproof design to keep you going down the trail in nearly any condition. It has a powerful 3 amp BEC for your lights, winch, and steering servo. And it’s fully programmable using an optional programmer box, so you can customize the ESC to suit your model’s needs and your own driving style.

The Firma 40 Amp Brushed ESC also helps reduce clutter and streamline your setup with an industry-leading, integrated 4-channel DSMR/DSM2 receiver. This integrated receiver system is perfectly suited to allow drivers the options for winch setups, dual steering mixes, and more. And setup is simple, with a convenient bind button and no complicated calibrations. When using Smart telemetry, alarms and parameters are set up automatically on your Spektrum transmitter.


  • Integrated SMART Technology
  • Built-in 4-Channel DSMR Receiver
  • Waterproof design
  • Dedicated LED power connectors
  • Multiple protection points


Warning: This product can expose you to substances known to the State of California to cause harm. Click here for more details.