The Spektrum P-SPMXSE2120 Firma 120A V2 Smart ESC with 3S–4S LiPo support, IC5 input, and 830A burst current is a high-performance brushless electronic speed control system designed for 1/8 scale surface vehicles. Engineered for aggressive off-road platforms, this waterproof ESC delivers intelligent telemetry, powerful output, and advanced braking control. With a selectable 6V/7V BEC, integrated cooling fan, and time-delay brake, the Spektrum P-SPMXSE2120 ensures smooth handling and reliable performance across demanding terrain. Whether you're racing, bashing, or trail running, this ESC offers precision, protection, and plug-and-play simplicity.
Key features of the Spektrum P-SPMXSE2120 Firma 120A V2 Smart ESC
- Smart telemetry – real-time data transmission including RPM, voltage, temperature, and battery capacity
- Time-delay brake – enhanced control for 1/8 scale surface vehicles
- Multiple programming options – button interface, Smart ESC Programming Box, and SmartLink USB app
- Waterproof housing – all-weather protection for off-road and surface applications
- Failsafe logic and multi-point protection – includes over-current, thermal, and low-voltage safeguards
- 4A adjustable BEC – selectable 6V or 7V output for servo compatibility
- Compact form factor – 43mm length and 153g weight for tight installs
Why choose the Spektrum P-SPMXSE2120 for 1/8 scale platforms?
The Spektrum P-SPMXSE2120 brushless ESC for 1/8 scale vehicles with cooling fan and time-delay brake is optimized for high-performance surface applications. With a continuous current rating of 120A and a burst capacity of 830A, this ESC delivers consistent torque and acceleration for competitive driving. Its time-delay brake feature enhances control during deceleration, especially on loose or uneven terrain. The rugged plastic case, aluminum heat sink, and integrated cooling fan ensure thermal stability and durability under load, making it ideal for RC trucks, buggies, and off-road platforms.
How does Smart telemetry improve diagnostics and control?
The Smart ESC for RC trucks and buggies with one-wire telemetry, failsafe logic, and aluminum heat sink offers seamless telemetry integration without the need for extra sensors or modules. Through a single wire, the ESC transmits RPM, temperature, battery voltage, and capacity directly to your Spektrum transmitter in real time. This allows drivers to monitor system health, adjust settings on the fly, and optimize performance based on live feedback. When paired with a Spektrum Smart LiPo battery, the ESC also provides detailed battery diagnostics such as cycle count, cell voltage, and remaining capacity.
What programming options are available for the Spektrum P-SPMXSE2120?
The Spektrum digital ESC with 830A burst current, 4mm motor leads, and SmartLink programming options supports multiple programming methods to suit different user preferences. For quick adjustments, the onboard button interface allows basic configuration without additional tools. For advanced tuning, users can connect the Smart ESC Programming Box or use the SmartLink USB app to access a full suite of settings. These options enable customization of throttle response, brake strength, cutoff thresholds, and more—ensuring the ESC can be tailored to match your driving style and terrain conditions. Firmware updates are also supported, allowing users to stay current with performance enhancements and feature upgrades.
Can the Spektrum P-SPMXSE2120 handle wet and rugged environments?
Absolutely. The Spektrum P-SPMXSE2120 waterproof surface ESC with Smart telemetry, 4mm motor bullets, and 4A adjustable BEC is built for all-weather operation. Its waterproof housing protects internal components from moisture, dust, and debris, making it suitable for use in rain, snow, and mud. The high heat-resistant IC5 connector ensures reliable power delivery, while the compact dimensions allow for flexible placement within tight chassis layouts. Whether you're navigating unpredictable terrain or pushing your vehicle to its limits, this ESC is engineered to perform under pressure.
What protection systems are built into the Spektrum P-SPMXSE2120?
The high-performance surface ESC with button programming, waterproof housing, and multi-point protection includes a comprehensive set of safety features. Over-current protection prevents damage during electrical surges, while thermal protection safeguards against overheating. The programmable low-voltage cutoff protects your LiPo battery from over-discharge, and failsafe logic ensures controlled shutdown in the event of signal loss. These systems work together to maintain the integrity of your electronics and provide peace of mind during high-stress driving scenarios.
Buy Spektrum P-SPMXSE2120 Firma 120A Smart ESC for 3S–4S brushless RC vehicles and off-road platforms.
Brand, Model and Product Type
- Brand: Spektrum
- Model: P-SPMXSE2120
- Product Type: Spektrum P-SPMXSE2120 Firma 120A V2 Smart ESC with 3S–4S LiPo support, IC5 input, and 830A burst current, Spektrum P-SPMXSE2120 waterproof surface ESC with Smart telemetry, 4mm motor bullets, and 4A adjustable BEC, Spektrum P-SPMXSE2120 brushless ESC for 1/8 scale vehicles with cooling fan and time-delay brake, Spektrum P-SPMXSE2120 with 6V/7V selectable BEC, 153g weight, and 43mm length for compact installs, Smart ESC for RC trucks and buggies with one-wire telemetry, failsafe logic, and aluminum heat sink, High-performance surface ESC with button programming, waterproof housing, and multi-point protection
Dimensions
- Length: 4.3 cm – compact footprint for 1/8 scale chassis layouts
- Width: 3.9 cm – standard width for secure mounting and airflow
- Height: 3.4 cm – low-profile design for vertical clearance in off-road builds
- Weight: 153 g – optimized for balance and durability
Electrical and Performance Specifications
- ESC Type: Brushless – optimized for efficient motor control in surface vehicles
- Application: Surface – ideal for 1/8 scale RC trucks and buggies
- Input Voltage: 3S–4S LiPo (11.1V–14.8V) – supports high-performance setups
- Maximum Continuous Current: 120A – delivers sustained power for aggressive driving
- Maximum Burst Current: 830A – handles peak loads during acceleration and throttle spikes
Connector and Output Configuration
- Battery Connector: IC5 – high heat-resistant input, backwards compatible with EC3 and EC5
- Motor Output Lead: 4mm bullet connectors – secure and efficient connection for brushless motors
Processor and Control Features
- Processor: 32-bit ARM M4 – enables high-resolution signal input and precise motor output
- Programmable: Yes – supports multiple programming methods for flexible configuration
- Programming Options: Button interface, Smart ESC Programming Box, SmartLink USB App
- Forward/Reverse: Yes – includes full directional control for surface vehicle maneuverability
- Brakes: Yes – includes time-delay brake for enhanced control
Telemetry and Smart Technology
- Telemetry: Smart all-in-one – transmits RPM, voltage, temperature, and battery data via one-wire link
- Smart Battery Data: Compatible with Spektrum Smart LiPo – displays cycles, capacity, and cell voltage in real time
Protection and Safety Features
- Waterproof Rating: Yes – sealed housing for all-weather operation
- Failsafe Protection: Yes – maintains control during signal loss or system fault
- Thermal Protection: Yes – prevents overheating during extended use
- Overload Protection: Yes – safeguards against electrical surges
- Low-Voltage Cutoff: Programmable – protects battery from over-discharge
BEC Specifications
- BEC Type: Adjustable – provides stable power delivery to receiver and servos
- BEC Voltage: Selectable 6V or 7V – supports a range of servo configurations
- BEC Continuous Current: 4A – suitable for high-demand surface electronics
Construction and Mounting
- Case Material: Rugged plastic – impact-resistant for off-road durability
- Heat Sink: Integrated aluminum – improves thermal efficiency under load
- Cooling Fan: Yes – active cooling for sustained high-current operation
- Mounting Tabs: Included – enables secure installation in surface vehicle chassis
- Installation: Ready to install – no soldering required
What’s in the Box
- 1 × Spektrum Firma Smart ESC
- 1 × Spektrum Smart Sticker Sheet
- 1 × Product Manual
What You Require / What You Will Need
- 1 × Spektrum Surface Receiver
- 1 × Spektrum Smart Technology LiPo Battery
- 1 × Spektrum Transmitter
