The Spektrum P-SPMXSEM1040A Firma 2-in-1 sensored crawler motor and ESC combo with 1400Kv output and 2S–3S LiPo support is a purpose-built solution for 1/10-scale crawlers, scalers, and trail rigs demanding precision, torque, and compact integration. Engineered with advanced Field-Oriented Control (FOC), this waterproof 550-size unit delivers unmatched throttle fidelity and drag brake performance across steep inclines and technical terrain. With SmartLink compatibility, adjustable BEC, and a fully sealed housing, the Spektrum P-SPMXSEM1040A offers intelligent control and rugged reliability for scale builders and competitive rock crawlers alike.
Key features of the Spektrum P-SPMXSEM1040A Firma 2-in-1 sensored crawler motor and ESC combo
- Integrated 2-in-1 design – combines motor and ESC in a compact 550-size housing for tight installs
- Advanced FOC control – delivers precise RPM matching and torque regulation across all terrain types
- Pro-level drag brake tuning – up to 200% brake force for secure hold on steep inclines
- SmartLink programming – supports firmware updates and trail-side tuning via optional programmer box
- Waterproof construction – sealed housing for dustproof and all-weather operation
- Adjustable BEC – 6V/7.4V switch-mode output with 4A continuous current for servo compatibility
- High-efficiency power delivery – closed-loop control for longer battery life and consistent torque
How does the 2-in-1 architecture benefit scale builds?
The Spektrum P-SPMXSEM1040A waterproof 550-size motor/ESC system with FOC control, 4A BEC, and IC3 connector is designed to reduce clutter and maximize space in scale crawler chassis. By integrating the ESC directly into the motor housing, builders gain valuable room for accessories, interior detailing, and clean wire routing. The 58mm length and 201g weight make it a drop-in fit for most 1/10-scale platforms, including trail rigs and competition crawlers. This compact footprint ensures compatibility without compromising performance or durability.
What makes FOC control ideal for crawling?
The Smart-compatible 2-in-1 motor/ESC for 1/10-scale crawlers, scalers, and trail rigs with RPM matching features Field-Oriented Control technology that precisely aligns motor output with throttle input. This results in smoother low-speed driving, better torque modulation, and improved control on uneven terrain. The system uses a magnetic encoder and rotor position sensor to maintain 1:1 throttle fidelity, allowing drivers to navigate rocks, slopes, and tight turns with confidence. Whether ascending a steep trail or descending a loose surface, FOC ensures consistent and responsive motor behavior.
How does the drag brake system enhance crawling performance?
The Spektrum P-SPMXSEM1040A brushless crawler system with 40A continuous ESC, 160A burst, and 200% drag brake tuning offers extensive brake adjustability for terrain-specific tuning. With up to 200% drag brake force, users can lock their vehicle in place on steep inclines or during technical maneuvers. This level of control is essential for rock crawling competitions and scale realism, where holding position without rolling is critical. The drag brake can be fine-tuned via the optional Spektrum ESC Programmer Box, allowing for precise calibration based on drivetrain setup and vehicle weight.
Is the Spektrum P-SPMXSEM1040A suitable for wet and dusty conditions?
Absolutely. The high-efficiency crawler system with waterproof housing, failsafe logic, and SmartLink programming options is built for all-weather operation. Its sealed design protects internal electronics from water, mud, and debris, making it ideal for trail driving in unpredictable environments. Whether you're crossing streams, climbing wet rocks, or navigating dusty paths, the waterproof construction ensures uninterrupted performance and long-term reliability.
What kind of power efficiency does this system offer?
The Spektrum digital motor/ESC unit with 160A burst, 4-pole rotor, and 3mm shaft for torque-sensitive platforms uses closed-loop control to match current draw with throttle demand. This intelligent power management reduces unnecessary energy consumption, extending battery life and improving runtime. Compared to sensorless systems, the Spektrum P-SPMXSEM1040A delivers smoother operation and significantly greater efficiency—especially during slow-speed crawling and high-angle climbs where torque consistency is vital.
How flexible is the programming interface?
Using the optional Spektrum ESC Programmer Box (V2 required), users can access a full suite of tuning parameters including throttle curves, drag brake strength, and cutoff thresholds. The Spektrum P-SPMXSEM1040A with 6V/7.4V adjustable BEC, 201g weight, and 58mm length for tight installs also supports firmware updates via SmartLink USB, ensuring compatibility with future enhancements. This flexibility allows drivers to adapt their setup to changing terrain, driving style, or competition requirements—all without removing the unit from the vehicle.
Buy Spektrum P-SPMXSEM1040A Firma 2-in-1 1400Kv motor/ESC combo for 1/10-scale rock crawlers and scalers.
Brand, Model and Product Type
- Brand: Spektrum
- Model: P-SPMXSEM1040A
- Product Type: Spektrum P-SPMXSEM1040A Firma 2-in-1 sensored crawler motor and ESC combo with 1400Kv output and 2S–3S LiPo support, Spektrum P-SPMXSEM1040A waterproof 550-size motor/ESC system with FOC control, 4A BEC, and IC3 connector, Spektrum P-SPMXSEM1040A brushless crawler system with 40A continuous ESC, 160A burst, and 200% drag brake tuning, Spektrum P-SPMXSEM1040A with 6V/7.4V adjustable BEC, 201g weight, and 58mm length for tight installs, Smart-compatible 2-in-1 motor/ESC for 1/10-scale crawlers, scalers, and trail rigs with RPM matching
Dimensions
- Length: 5.8 cm – compact enough for tight 1/10-scale crawler chassis
- Outer Diameter: 3.7 cm – standard 550-size motor profile for drop-in fitment
- Weight: 201 g – includes wire plug; optimized for balance and torque stability
- Shaft Diameter: 3 mm – suitable for torque-sensitive drivetrains
- Shaft Length: 1.6 cm – compatible with standard crawler gearboxes
Electrical and Performance Specifications
- Motor Type: Brushless – engineered for high-efficiency crawling and scaling
- ESC Type: Integrated – 2-in-1 motor/ESC architecture for simplified installation
- Application: Crawling, Surface – optimized for 1/10-scale rock crawlers and trail rigs
- Input Voltage: 2S–3S LiPo / 6–9 cell NiMH – supports common crawler battery setups
- Maximum Continuous Current: 40A – stable output for slow-speed torque control
- Maximum Burst Current: 160A – handles peak loads during steep climbs and throttle spikes
- RPM/Volt (Kv): 1400Kv – tuned for low-speed crawling and high-angle performance
- Number of Poles: 4 – delivers smooth torque and precise throttle modulation
Control and Programming Features
- FOC Control: Yes – Field-Oriented Control enables precise RPM/throttle matching
- Drag Brake Tuning: Up to 200% – customizable hold strength for steep inclines
- Programmable: Yes – supports SmartLink USB and ESC Programmer Box (V2 required)
- Forward/Reverse: Yes – full directional control for technical terrain
- Failsafe Logic: Yes – maintains control during signal loss or system fault
BEC Specifications
- BEC Type: Switch-mode – efficient power delivery with reduced heat
- BEC Voltage: Adjustable 6V or 7.4V – supports a wide range of servo configurations
- BEC Continuous Current: 4A – suitable for high-torque servo systems
Protection and Safety Features
- Overload Protection: Yes – safeguards against electrical surges
- Thermal Protection: Yes – prevents overheating during extended use
- Low-Voltage Cutoff: Yes – protects battery from over-discharge
- Waterproof Rating: Yes – sealed housing for all-weather operation
Connectivity and Compatibility
- Connector Type: IC3 – high heat-resistant input, backwards compatible with EC3
- Smart Compatibility: Yes – supports SmartLink programming and telemetry integration
What’s in the Box
- 1 × Spektrum Firma Brushless Sensored 2-in-1 System 1400Kv
- 1 × Product Manual
What You Require / What You Will Need
- 1 × Spektrum Surface Receiver
- 1 × 2S or 3S LiPo Battery with EC3 or IC3 Connector
- 1 × Spektrum Transmitter
