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Firma 160 Amp Brushless Smart ESC / 1250Kv Sensorless Motor Combo
  • Overview
  • Specs
  • Reviews
  • Parts & Accessories
  • Manuals & Support

Product Features

  • 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 1250Kv 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

Product Overview

Like every component in the Spektrum™ Smart ecosystem, Firma™ 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!

This ESC comes bundled with a Spektrum Firma 1250Kv Brushless Motor capable of handling everything this ESC can put out that is a perfect to get you driving with Spektrum Smart technology.

Needed to Complete
  • Spektrum™ Surface Receiver
  • Spektrum Smart Technology LiPo Battery
  • Spektrum Transmitter
What's in the Box?
  • (1) Spektrum™ Firma™ Smart ESC
  • (1) Spektrum™ Firma™ 1250Kv Brushless Motor
  • (1) Spektrum Smart sticker sheet
  • (1) Product Manual

Firma Smart ESC Video Overview


Spektrum™ Smart Technology Video Overview




The all-weather, waterproof design of Spektrum™ Firma™ Smart ESCs allows them to perform in nearly any terrain under almost any conditions. Firma ESCs keep you going through dust, gravel, snow, and water.




Firma™ ESCs feature IC™ series battery connectors. The IC series of connectors are designed from the ground up to provide a more solid connection, higher heat resistance, and effortless installation. When used with an IC3™ or IC5™ connector-equipped Spektrum™ Smart battery, the ESC can receive and transmit battery telemetry data. EC3 and EC5 are also compatible with Firma ESCs for basic operation and ESC telemetry.




No need to connect multiple wires, sensors, modules, and links. With Firma™ ESCs, simple one-wire telemetry transmits a wide range of data directly to your transmitter in real time, including RPM, voltage, temperature, balance, capacity, and speed.*

*See compatibility chart for more information.




When used with a Spektrum™ Smart LiPo battery, your Firma™ ESC provides you with the benefit of battery telemetry that's automatically transmitted to your compatible Spektrum radio in real time. On your transmitter screen you'll be presented with helpful information such as number of cycles, battery percentage, individual cell voltage and more!




Multiple programming options are available. Button programming can be used with nothing more needed. Using the Smart Firma™ ESC Programming Box, you can easily change settings at the track to suit driving conditions. An easy-to-use Smart Link USB Updating and PC Programmer app is also available.




The Firma™ ESCs' 32-bit M4 processor produces higher resolution signal input and more accurate motor output.

Auto Cutoff: Yes
BEC: Yes
BEC Continous Current: 5A
BEC Type: Switch Mode
BEC Voltage: 6V
Battery Connector: IC5
Battery Input Lead: 10AWG Dual IC5, EC5 compatible
Brakes: Yes
Bushing Or Bearing: Bearing
Cells: 4-8 cell LiPo
Connector Type: 6.5mm Bullet
Efficiency: 90%
Forward: Yes
Height: 1.8" (44mm), ESC
Input Voltage: 3S - 8S LiPo,12-35.2V
Length: 2.7" (70mm), ESC
Low-Voltage Cutoff Programmable: Yes
Maximum Burst Current: 1050A
Maximum Continuous Current: 180A,160A
Motor Connector: 6.5mm Bullet
Motor Output Lead: 6.5mm Female Bullets
Motor Type: Brushless
Number of Poles: 4
Outer Diameter: 1.9 in (49mm), motor
Output: 6300W
Overall Length: 3.3" (85mm), motor
Overload Protection: Yes
Programmable: Yes
RPM/Volt (Kv): 1250Kv
Recommended Speed Control: Spektrum Firma 160 Smart ESC
Reverse: Yes
Sensored: No
Shaft Diameter: 3/16" (5mm)
Weight: 9.9oz (280g), ESC,26.1oz (740g), motor
Width: 3.03" (77mm), ESC
Wire Gauge: 10 AWG

Parts Listing

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Optional Accessories

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Product Support Tips

Product Support

Technical questions about this Zenoah product should be directed to Horizon Hobby's Product Support Department:

Horizon Hobby, LLC.
ATTN: Product Support

2904 Research Road
Champaign, IL 61822

To Contact Product Support please email us at

Sales Support

If you would like to purchase this product, please go to the Store Locator or contact the Horizon Hobby Consumer Sales Department:

Horizon Hobby, LLC.
ATTN: Consumer Sales

2904 Research Road
Champaign, IL 61822