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 SpektrumT engineers, in partnership with the industry's leading ESC manufacturer
- Ideal for 4WD 1/10th - 1/8th scale surface applications running on 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 ICT connectors, backwards compatible with ECT connectors
- Limited 1-year warranty
Product Overview
Like every component in the SpektrumT Smart ecosystem, FirmaT 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!
Video Overview
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ONE-WIRE TELEMETRY
No need to connect multiple wires, sensors, modules, and links. With FirmaT 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.
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Overview
The Spektrum Firma 100A Black Edition Brushless Smart ESC represents the pinnacle of modern electronic speed control technology for RC car enthusiasts across the UK. Whether you're running a competitive 1/10th scale 4WD racing machine or enjoying weekend bashing sessions, this waterproof brushless ESC delivers intelligent power management combined with real-time telemetry feedback to your transmitter. Designed specifically for 2S and 3S LiPo battery setups, the Firma 100A is an ideal choice for dedicated RC car UK enthusiasts seeking professional-grade performance without the complexity of traditional standalone telemetry systems.
What sets the Firma 100A apart from other brushless RC ESCs is its Smart technology integration. Developed and designed by Spektrum engineers in partnership with the industry's leading ESC manufacturer, this unit functions as much more than a simple speed controller—it's a virtual engineer inside your model, gathering vital operating data and transmitting it directly to your compatible Spektrum radio in real time. There's no need for additional sensors, modules, or complicated wiring setups. This single-wire telemetry solution has been rigorously tested and approved by the best brands in RC, making it the simpler and superior choice for serious RC enthusiasts.
The Black Edition finish gives this ready-to-install ESC a professional appearance whilst its rugged plastic case with mounting tabs ensures secure installation in virtually any 1/10th or 1/8th scale surface RC application. With waterproof construction, you can confidently take your brushless RC car UK experience into dust, gravel, snow, and even water without compromising electronics reliability.
Key Features
- Smart All-in-One Telemetry — This ESC provides one-wire telemetry that transmits a comprehensive range of data directly to your transmitter in real time, including RPM, temperature, battery voltage, capacity and speed, eliminating the need for separate telemetry modules or additional sensor connections.
- Fast, Powerful 32-bit ARM M4 Processor — The advanced processor architecture delivers higher resolution signal input and significantly more accurate motor output compared to standard ESCs, resulting in smoother throttle response and better motor control across all speed ranges.
- Waterproof Design — The all-weather, waterproof construction allows the Firma 100A to perform reliably in nearly any terrain and almost any weather conditions, keeping you going through dust, gravel, snow, and water without electronic failure or corrosion.
- Multiple Programming Options — You can programme this ESC using simple button programming with nothing more than the unit itself, via the Smart ESC Programming Box for trackside adjustments, or through the easy-to-use SmartLink USB Updating and PC Programmer application for comprehensive customisation.
- Multi-Point Protection System — Over-current protection, automatic LiPo low-voltage cutoff, thermal protection, and failsafe protection work together to safeguard your motor, battery and ESC from damage caused by overload, undervoltage, overheating or signal loss.
- IC5 Connector Compatibility — The ESC features high heat-resistant IC5 connectors designed from the ground up to provide solid connection and higher heat resistance, whilst remaining backwards compatible with older EC3 and EC5 connectors for basic operation.
- High-Current Adjustable BEC — The integrated Battery Elimination Circuit provides selectable 6V or 7.4V output at 4 Amps continuous current, allowing you to power your receiver, servo and other accessories directly from the main battery without a separate BEC module.
- Compact and Ready to Install — The space-efficient design fits easily into confined spaces in most RC applications, and requires no soldering—simply connect batteries, receiver and motor for immediate use.
- Aluminium Heat Sink with Cooling Fan — The aluminium heatsink combined with an integrated cooling fan ensures high efficiency and thermal management during extended high-power driving sessions, preventing thermal throttling and maintaining peak performance.
- Firmware Upgradeable — Keep your ESC current with the latest performance enhancements and bug fixes through firmware updates via the Smart ESC Programming Box, ensuring your unit benefits from manufacturer improvements throughout its lifetime.
Technical Performance
The Firma 100A Black Edition delivers professional-grade performance specifications that make it suitable for serious RC enthusiasts running 1/10th and 1/8th scale surface vehicles. With a continuous current rating of 100A and peak burst capability of 650A, this brushless ESC can handle demanding motor loads while maintaining stable power delivery. The unit operates on 2S and 3S LiPo battery configurations, accepting input voltages from 6.0V to 9.6V (equivalent to 2-3S LiPo or 5-9 cell NiMH packs), with a maximum input rating of 11.1V for safety margin. Construction quality is evident throughout—the rugged plastic case with strategic mounting tabs allows secure installation in virtually any vehicle chassis, whilst the high-grade IC5 connectors and 4mm bullet motor output connectors ensure reliable power transfer with minimal voltage drop. The adjustable high-current BEC delivers 4 Amps of continuous current at selectable 6V or 7.4V, making it capable of powering receivers, digital servos and peripheral electronics independently. Advanced protection circuitry includes programmable low-voltage cutoff to prevent battery damage during extended runtime, over-current protection to prevent damage from motor faults, thermal protection that monitors and regulates heat generation, and failsafe protection that activates upon signal loss. The Spektrum Smart technology integration means this isn't merely a speed controller—it's an intelligent system component that communicates bidirectionally with your transmitter, providing unprecedented insight into your vehicle's real-time operating parameters.
What's in the Box
- Spektrum Firma 100A Black Edition Brushless Smart ESC
- Spektrum Smart sticker sheet
- Product manual with full programming instructions
What You Need to Complete
- Spektrum Surface Receiver compatible with Smart technology
- Spektrum Transmitter with Smart ESC capability
- 2S or 3S LiPo battery with IC5 connector (or EC3/EC5 compatible battery)
- Brushless motor suitable for your specific RC vehicle (contact us for recommendations)
Frequently Asked Questions
- Is the Spektrum Firma 100A suitable for beginners to brushless RC cars? — Absolutely. While the Firma 100A is technically advanced, its Smart technology actually simplifies the setup process by providing real-time feedback through a single wire connection. Beginners benefit immediately from the telemetry data displayed on their transmitter, which helps them understand how their vehicle is performing and when adjustments are needed. The multiple programming options—including simple button programming—mean you don't need specialised knowledge to get started. We recommend the Firma 100A to anyone stepping up from brushed ESCs to brushless RC car UK technology.
- What batteries work with the Firma 100A Black Edition? — This ESC accepts 2S and 3S LiPo batteries (6.0V to 9.6V input voltage range), as well as 5-9 cell NiMH packs. For maximum Smart technology benefits including battery telemetry, use a Spektrum Smart LiPo battery equipped with an IC5 connector. Older batteries with EC3 or EC5 connectors will still work for basic operation, though you'll lose the additional battery data in your transmitter. The unit accepts a maximum input voltage of 11.1V for safety margin.
- What makes the Firma 100A different from other 100A brushless ESCs? — The Firma 100A's standout feature is its integrated Smart telemetry system, which transmits vital operating data through a single wire connection directly to your Spektrum transmitter in real time. Other ESCs typically require separate telemetry modules and additional wiring. The Firma also uses a powerful 32-bit ARM M4 processor for superior signal processing and motor control, waterproof construction for all-weather reliability, and a user-friendly three-tier programming system that suits everyone from beginners to advanced users. Additionally, Spektrum's partnership with a leading global ESC manufacturer ensures manufacturing quality and performance reliability.
- Can I use the Firma 100A with non-Spektrum receivers and transmitters? — The ESC will function with other brands' receivers for basic speed control, but you'll lose the Smart telemetry capability that makes this unit special. The Firma 100A is specifically designed to integrate with Spektrum Smart ecosystem components. For the full experience, including real-time RPM, temperature, voltage and capacity data on your transmitter display, you'll need compatible Spektrum receiver and transmitter hardware.
- How does the waterproof design work, and can I submerge it? — The Firma 100A features all-weather waterproof construction suitable for dust, gravel, snow and water splashes during normal RC driving. Whilst it can handle water crossings and wet conditions, it's not designed for full submersion or prolonged underwater operation. The waterproof sealing protects against moisture ingress during typical outdoor RC use but shouldn't be tested with intentional submersion.
- What's the difference between 6V and 7.4V BEC output, and which should I use? — The BEC (Battery Elimination Circuit) voltage is selectable via programming. Most digital servos and modern receivers prefer 7.4V for faster response and higher control authority, whilst 6V is suitable for older servo designs or when you need slightly lower draw. Choose based on your specific servo and receiver requirements—your manual will specify the preferred voltage for your chosen accessories.
- Is firmware upgrading necessary, and how often does Spektrum release updates? — Firmware updates are optional but recommended to access performance improvements and bug fixes released by Spektrum. Updates are conducted through the Smart ESC Programming Box connection to a PC running the SmartLink application. Spektrum releases updates periodically in response to user feedback and performance optimisations, though your unit functions perfectly well on its original firmware. We recommend checking the Spektrum website quarterly for any available updates relevant to your vehicle type.
Why Buy from RC Model Shop?
RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the SPM Firma 100A Black Edition Brushless Smart ESC, 2S-3S P-SPMXSE2100 today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.
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