Firma 120 Amp Brushless Smart ESC, 3S-4S
$109.99
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Firma 120 Amp Brushless Smart ESC, 3S-4S
$109.99
120A Power
Continuous high-current brushless output
Smart Telemetry
Real-time battery and RPM data
3S-4S LiPo
Ideal for 1/8 scale RC
Waterproof Design
All-weather off-road performance
Fast Processing
32-bit ARM M4 MCU core
Adjustable BEC
Selectable 6V or 7.4V output
Intelligent Surface PowerNext-level electronic speed control technology
The Spektrum Firma 120A Brushless Smart ESC delivers unmatched power and telemetry intelligence for your 1/8 scale RC car without requiring extra sensors or modules. Designed for 3S to 4S LiPo setups, this brushless motor speed controller feeds real-time motor temperature, battery voltage, and RPM data directly to your radio. Experience seamless plug-and-play operation and superior all-weather durability with advanced waterproof protection.
Smart Ecosystem AdvantageReal-time data and total electronics protection
Upgrade your surface model's performance with the Spektrum Firma 120A Brushless Smart ESC, engineered specifically for high-demand off-road and on-road applications. Utilizing a fast 32-bit ARM M4 processor, this brushless electronic speed control acts like an onboard technician, constantly monitoring operating telemetry to optimize vehicle efficiency. Built-in multi-point protection safeguards your electronics against over-current, thermal overload, and low-voltage battery damage. Featuring high-heat resistant IC5 connectors that are fully backwards compatible with EC5 plugs, the Spektrum Firma 120A Smart ESC simplifies your wiring into a clean, single-wire telemetry setup requiring zero soldering.
Technical SpecificationsDetailed engineering specs and dimensions
Compatible Vehicles
1/8 Scale Surface Vehicles
Part Type
Electronic Speed Control (ESC) (cpu)
Motor Type
Sensorless Brushless
Input Voltage
6.0V - 14.4V (2S-4S LiPo, 5-12 Cell NiMH) (bolt)
Maximum Continuous Current
120A
Maximum Burst Current
830A
BEC Type
Switch Mode
BEC Voltage
6.0V / 7.4V Selectable
BEC Continuous Current
4A (current)
Connector Type
IC5
Output Connector
4mm Bullet
Product Length
1.7" (43 mm) (ruler)
Product Width
1.53" (39 mm) (ruler)
Product Height
1.33" (34 mm) (ruler)
Product Weight
0.337 lbs
Water-Resistant
Yes
Technology
Spektrum Smart Telemetry
Key Performance FeaturesAdvanced telemetry for ultimate drive control
TelemetrySmart all-in-one single-wire data transmission
ProcessorFast and powerful 32-bit ARM M4 core
WaterproofingAll-weather waterproof electronic housing
ConnectorsHigh-heat resistant IC5 connectors pre-installed
ProgrammingMulti-option via button, programming box, or USB app
BEC OutputHigh-current adjustable 6V or 7.4V @ 4A
ProtectionOver-current, thermal, failsafe, and LiPo cutoff
ConstructionRugged case with aluminum heat sink and fan
Frequently Asked QuestionsEverything you need to know
What battery voltage range does the Spektrum Firma 120A Brushless Smart ESC support?
The Spektrum Firma 120A Brushless Smart ESC supports 2S to 4S LiPo battery packs (6.0V - 14.4V) as well as 5 to 12 cell NiMH batteries, making it perfect for high-performance 1/8 scale RC cars.
Do I need extra telemetry modules with the Spektrum Firma 120A Brushless Smart ESC?
No, the Spektrum Firma 120A Brushless Smart ESC uses Spektrum Smart single-wire technology to stream data like RPM, battery capacity, temperature, and voltage directly to your compatible transmitter without external modules.
Is the Spektrum Firma 120A Brushless Smart ESC fully waterproof?
Yes, the Spektrum Firma 120A Brushless Smart ESC features a sealed, waterproof housing, allowing you to run your RC vehicle safely through wet conditions, snow, and mud.