Spektrum RC Firma 150 Amp Sensorless Brushless Smart ESC & Motor Combo (2050Kv)

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Price: $219.99
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Spektrum Firma 150 Amp Sensorless Brushless Smart ESC & Motor Combo, with included 2050Kv motor. Like every component in the Spektrum Smart ecosystem, Firma Smart ESCs combine "plug-and-play" simplicity with the ability to communicate with other Spektrum Smart electronics.

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 Smart compatible transmitter in real time, allowing the ability to adjust settings as needed to boost performance on the go.

This ESC comes bundled with a Spektrum Firma 2050Kv Brushless Motor capable of handling everything this ESC can put out that is a perfect to get you driving with Spektrum Smart technology.

*NOTE: Smart functionality requires use of Spektrum Smart compatible battery, transmitter and receiver.  



  • 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™ engineers, in partnership with the industry's leading ESC manufacturer
  • Comes bundled with Spektrum Firma 2050Kv Brushless Motor
  • 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™ connectors, backwards compatible with EC™ connectors
  • Limited 1-year warranty
Auto Cutoff: Yes
BEC: Yes
BEC Continous Current: 5A
BEC Type: Linear
BEC Voltage: 6V
Battery Connector: IC5
Battery Input Lead: IC5, EC5 compatible
Brakes: Yes
Forward: Yes
Height: 1.5" (38.5mm), ESC
Input Voltage: 3S - 6LiPo
Length: 2.3" (58mm), ESC
Low-Voltage Cutoff Programmable: Yes
Maximum Burst Current: 950A
Maximum Continuous Current: 150A
Motor Connector: 4mm Bullet
Motor Output Lead: 5.9" (150mm) 10AWG
Output: 3000W
Overload Protection: Yes
Programmable: Yes
RPM/Volt (Kv): 2050Kv
Reverse: Yes
Sensored: No
Weight: 8.4oz (238g), ESC
Width: 1.9" (47.5mm) without tabs, 2.3" (59.5mm) with tabs, ESC

  • (1) Spektrum™ Firma™ Smart ESC
  • (1) Spektrum™ Firma™ 2050Kv Brushless Motor
  • (1) Spektrum Smart sticker sheet
  • (1) Product Manual
Needed to Complete:
  • LiPo Battery w/EC5 or Spektrum Smart Battery w/IC5 connector*
*NOTE: Smart functionality requires use of Spektrum Smart compatible battery, transmitter and receiver. 

This product was added to our catalog on June 29, 2020

Verified Owner
Tuesday, Aug 17 2021 (11 months ago)
Spektrum RC Firma 150 Amp Sensorless Brushless Smart ESC & Motor Combo (2050Kv)
In what appears to be typical for Spektrum, I was unable to access the features described in their Quick Hit Tech Tips. There are two tables of options for the ESC on line. One has eight lines, the other 11. I spent a great deal of time messing around with button programming before I finally gave up and called tech support. They informed me that I can't get there from here because of my out of date firmware and software, and advised me to buy a programmer card. I did, and got into another mess with broken links and old updates for the card USB link, and the ESC. Another call to tech support got me to the latest updates. Sadly, it did not resolve the problem of missing programmable feature on the ESC. There are two sets of specs for the 150A Smart ESC, and mine just wasn't as smart. It turns out that three options may have been dropped. Tech support is following up with Spektrum to see if eliminating the features was a design "upgrade." Main thing that's missing is the ability to set the LVC voltage, which was my only reason for buying the programmer. Push button programming works fine as long as you have the correct table. Having the table be part of the paper manual would have been nice, not having a table on line with three options that no longer exist would have been nice too. In a nut shell, printed Spektrum documentation, and documentation on line are a mess. Tech support was good, other than misleading me into buying a programmed that did not solve the problem. The difference in tables of features were news to them too. Other than taking my battery down below 3V one time, the ESC works OK. No problems with the motor, works as it should.
Verified Owner
Tuesday, Feb 23 2021 (about a year ago)
Spektrum RC Firma 150 Amp Sensorless Brushless Smart ESC & Motor Combo (2050Kv)
Perfect !!!!! Works better than most of the combinations that i tried..
Verified Owner
Monday, Dec 14 2020 (about a year ago)
Spektrum RC Firma 150 Amp Sensorless Brushless Smart ESC & Motor Combo (2050Kv)
The product is what I ordered and i received it fast tks.