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Spektrum RC Firma 120A Brushless Smart ESC, 4S
Spektrum RC Firma 120A Brushless Smart ESC, 4S

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Our Price: $99.99

Stock Status:Out of Stock


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 regulating 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!

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
• 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
Ideal for 1/8th scale surface applications running on 4s Lipo setups
• Cooling fan
• High current adjustable BEC (6v or 7.4v @ 4 Amps)
• Firmware updatable through the Smart ESC Programming Box
• High heat-resistant IC™ connectors, backwards compatible with EC™ connectors
• Limited 1-year warranty

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 Smart sticker sheet
(1) Product Manual


Auto CutoffYes
Battery TypeLiPo (3.7V per cell)
BEC Continous Current4A
BEC Voltage6 and 7V selectable
Connector TypeIC5
Drive TypeForward/Brake/Reverse
Input Voltage6.0V - 14.4V (2-4S LiPo, 5-12 cell NiMH)
Low-Voltage Cutoff ProgrammableYes
Maximum Burst Current830A
Maximum Continuous Current120A
Motor Connector4mm Female Bullet
Overload ProtectionYes
Product Height1.33" (34 mm)
Product Length1.7" (43 mm)
Product Weight0.337lbs (153g)
Product Width1.53" (39 mm)
Time Delay BrakeYes

Average Rating: Average Rating: 4 of 5 4 of 5 Total Reviews: 1 Write a review »

  0 of 0 people found the following review helpful:
4 of 5 Nice January 27, 2021
Reviewer: DAVID from ,  
LA parts 🤔 ..the place as a hole ..is alright..don't  like the shipping they use..but the guy is very helpful..and understanding..so for tht I'll  give four stars

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