Spektrum Firma 70A Brushed Smart ESC 2S-3S IC3 / 35T Brushed Motor Combo

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The Spektrum™ Firma 70 amp Brushed Smart ESC and motor combo is waterproof and ready to use in most 1/10th scale RC crawlers. Featuring programming options that make it easy to tune for off-road scalers and rock crawlers on or off the trail.

Key Features
  • MOTOR COMBO: includes powerful 3S capable 35T rebuildable brushed motor
  • PROGRAM VIA TRANSMITTER: Proprietary Text Gen Programming Allows for programming the esc from Transmitter
In The Box
  • (1) Spektrum Firma 70A Brushed Smart ESC
  • (1) Spektrum Firma 35T Rebuildable 3-Pole Brushed Motor
  • (1) Product Manual
Needed to Complete
  • Spektrum™ Surface Receiver
  • 2S or 3S Lipo Battery with EC3 or IC3 Connector
  • Spektrum Transmitter


  • Smart all-in-one telemetry
  • Provides Spektrum Smart battery data, input voltage, esc temperature, esc amperage, RPM, and Text Gen Telemetry data over one wire. No additional sensors required
  • Includes Spektrum 35T Rebuildable Brushed Motor – Excellent completion option for 1/10 scalers and rock crawler models running 2S or 3S LiPo power
  • Integrated LED light power outputs for simple installation without the need of additional receiver ports
  • Includes 2 LED Light Strings (Red and White)
  • 70 Amp continuous power - excellent for 1/10 scale on-road and off-road racing and 1/10 scale crawlers and scalers
  • 2S-3S LiPo Compatible
  • Waterproof ESC*
  • Multiple options for easy programming:Smart ESC Programming Box
    SmartLink USB Updating and Programmer application
    Programming from Transmitter via Text Gen Telemetry
  • 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
  • Aluminum heat sink for high efficiency
  • Adjustable high-power BEC (6V or 7.4V, 4amp)
  • Firmware updatable through the Smart ESC Programming Box
  • High heat-resistant IC™ connectors, backwards compatible with EC™ connectors

The Spektrum™ Firma 70 amp Brushed Smart ESC and motor combo is waterproof and ready to use in most 1/10th scale RC crawlers. Featuring programming options that make it easy to tune for off-road scalers and rock crawlers on or off the trail.

This ESC and Motor Combo is an excellent choice to complete your 1/10th scale off-road crawlers and scale rigs. The ESC and Motor feature industry leading tunability and accessibility, making it easy to adjust settings to get the best performance out of your crawlers, at home or on the trail.

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 motor current, 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!

The Spektrum Firma 3-Pole Rebuildable Brushed Motors offer an impressive low-cost upgrade for brushed esc equipped 1/10th Racers and Bashers. Featuring fully rebuildable design, impressive high rpm speed and control, and excellent efficiency.

Adjustable timing for clockwise and counterclockwise motor rotation
540 can size – perfect upgrade for most 1/10th scale
Pre-shaped curved face brushes – No break-in period required!
Wires and 3.5mm bullets installed – No soldering required!
Ball bearing supported rotor

The Spektrum Firma 70 amp Brushed Smart ESC features a huge range of drag brake adjustability, allowing for drivers to expertly tune their models depending on their driven train and vehicle weight. Featuring fine levels of adjustability for Drag Brake Percentage and Drag Brake Rate that is perfect for tuning your crawlers and scalers for expert level rock crawling performance.

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.

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 voltage, temperature, balance, capacity, and motor current.*

Multiple programming options are available. Using the Smart Firma™ ESC Programming Box, you can easily change settings on the trail to suit driving conditions. An easy-to-use Smart Link USB Updating and PC Programmer app is also available. And for those with a Text Gen capable, programming and adjustment of ESC settings can be performed, right from your Spektrum transmitter, no additional modules or wires needed!

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 capacity used and remaining, individual cell voltage and more!

*Please see manual for Waterproof Usage Guidelines

**See compatibility chart for more information.


Product Specifications
Forward Yes
Reverse Yes
Amperage 70A
Turns 35T
Maximum Burst Current 200A
Maximum Continuous Current 70A
Motor Type Brushed
Speed Control Included
Auto Cutoff Yes
BEC Continous Current 4A (Shared Between Receiver and Aux Light Outputs)
Low-Voltage Cutoff Programmable Yes
Number of Poles 3
Product Weight 1.76 oz (50 g)
Water-Resistant Yes
Adjustable Timing No
Brakes Integrated with ESC
Programmable Yes
Product Width 1.18" (30 mm)
Technology Smart
Product Length 1.41" (36 mm)
Connector Type IC3,3.5mm Bullet
BEC Voltage 6V / 7.4V User Selectable
Input Voltage 2–3 Cell Li-Po / Li-Fe; 5–9 Cell Ni-MH / Ni-Cd
Motor Limit 540 / 550 Size Brushed Motors
Product Height 0.71" (18 mm)



More Information
Brand Spektrum
Brush Type Brushed
Turn Rating 30 - 55
Vehicle Type Car