Spektrum Firma 85A Brushless Smart ESC 2S-3S

Quantity: Only 3 left in stock.




Like every component in the Spektrum(TM) Smart ecosystem, Firma(TM) Smart ESCs combine "plug-and-play" simplicity with the ability to communicate with other Smart electronics - together, creating the best-performing RC system for your vehicle imaginable.


Firma Smart ESCs do much more than regulate power. They function like a virtual engineer inside your model, providing a direct path to the vital operating data you need to reach peak performance. Firma Smart ESCs give you an extra layer of confidence that your electronics are all operating at their best.

With Firma Smart ESCs, you'll be better connected to your vehicle than ever before - without installing extra components that all work independently of each other. You won't need extra wires, modules, or links. A Firma electronic speed control provides a one-wire solution for obtaining telemetry data such as RPM, temperature, battery voltage and capacity.

Firma ESCs not only gather the data but also send it to your transmitter in real time, instead of only storing it for after-run study. You're able to adjust settings as needed to boost performance on the go. The Firma Smart single-wire telemetry solution has been tested for quality and performance by the best brands in RC. Their verdict? Smart technology is both simpler and superior!



  • Smart all-in-one telemetry
  • Fast, powerful 32-bit ARM M4 processor
  • Waterproof
  • Multiple options for easy programming:
    • Button programming
    • Smart ESC Programming Box
    • SmartLink USB Updating and Programmer application
  • Multi-point protection:
    • Over-current protection
    • Automatic LiPo low-voltage cutoff
    • Thermal protection
    • Failsafe protection
  • Developed and designed by Spektrum(TM) engineers, in partnership with the industry's leading ESC manufacturer
  • Ideal for 2WD and 4WD 1/10th scale surface applications running on 2S - 3S Lipo setups
  • High current adjustable BEC (6v or 7.4v @ 4 Amps)
  • Compact for easy installation in most applications
  • Ready to install - no soldering required
  • Rugged plastic case with mounting tabs
  • Aluminum heat sink for high efficiency
  • Cooling fan
  • Adjustable high-power BEC
  • Firmware updatable through the Smart ESC Programming Box
  • High heat-resistant IC(TM) connectors, backwards compatible with EC(TM) connectors
  • Limited 1-year warranty


Product Specifications

  • Battery Input Lead     12AWG 5.1" (130mm)
  • Product Width     2.1" (53 mm)
  • Technology     Smart
  • Auto Cutoff     Yes
  • BEC Continous Current     4A
  • Low-Voltage Cutoff Programmable     No
  • Output     85A
  • Output Connector     4mm Bullet
  • Overload Protection     Yes
  • Product Weight     0.255
  • Water-Resistant     Yes
  • Forward     Yes
  • Reverse     Yes
  • Wire Gauge     12 AWG
  • Maximum Burst Current     550A
  • Motor Type     Brushless - Sensorless
  • Battery Type     LiPo (3.7V per cell)
  • Brakes     Yes
  • Programmable     Yes
  • Product Length     1.7" (43 mm)
  • Connector Type     IC3
  • BEC Type     Switch Mode
  • BEC     Yes
  • BEC Maximum Burst Current     8A
  • BEC Voltage     6V/7.4V
  • Input Voltage     2S - 3S LiPo, 5 - 9 cell NiMH
  • Motor Limit     With 2S LiPo: KV = 5000 - With 3S LiPo: KV = 3000
  • Motor Output Lead     12AWG 5.1" (130mm)
  • Product Height     1.3" (33 mm)
  • Time Delay Brake     Yes


Needed to Complete

  • Spektrum(TM) Surface Receiver
  • Spektrum Smart Technology LiPo Battery
  • Spektrum Transmitter


What's in the Box?

  • (1) Spektrum(TM) Firma(TM) Smart ESC
  • (1) Spektrum Smart sticker sheet
  • (1) Product Manual


Used with permission, copyright ©2022 Horizon Hobby, Inc. Copyright ©2022 Brey Corp. t/a Hobby Works.®



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