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Spektrum (SPM)
SKU:SPMXSEM0502
Firma Sensored Brushless Motor ESC / 2800Kv 2-in-1 Combo for Axial UTB18 Capra 4WS (SPMXSEM0502)
Firma Sensored Brushless Motor ESC / 2800Kv 2-in-1 Combo for Axial UTB18 Capra 4WS (SPMXSEM0502)
The Spektrum Firma 30A Sensored Brushless ESC and 2800Kv motor 2-in-1 combo is a waterproof powertrain designed for the Axial UTB18 Capra 4WS 1/18-scale RC rig. It pairs a high-precision sensored ESC with a 2800Kv motor to deliver smooth, responsive throttle control and a true one-to-one feel at any speed or angle.
Compatible with 2S or 3S LiPo power, this compact, aluminum-bodied unit is ready to install with no soldering required. It includes multi-point protection—over-current protection, automatic LiPo low-voltage cutoff, thermal protection, and failsafe—and an adjustable high-power BEC for dependable performance on trails or in competition.
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Exploded View
Parts List
Parts List
Product Manual
Product Manual

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Overview
Enhance your Axial UTB18 Capra 4WS, 1/18 4WD experience with the Spektrum Firma 30-amp Sensored Brushless ESC and Motor 2-in-1 Combo. This expertly engineered and waterproof system is specifically designed to deliver optimal performance on any terrain. Its high-precision magnetic encoder coupled with a rotor position sensor offers a responsive driving experience, ensuring that the throttle input is perfectly matched to the motor’s RPM at all speeds and angles.
This versatile ESC and motor combo stands out as a top-notch upgrade for competitive racing or recreational trail adventures. It effectively handles power from 2S to 3S LiPo batteries, making it ideal for various applications. Designed for easy installation, this system eliminates the need for soldering, allowing for a straightforward setup in most configurations.
The Spektrum combo is built with a robust aluminum construction that aids in heat dissipation, while its multi-point protection system includes safeguards against over-current, low-voltage, thermal anomalies, and failsafe operations. With an adjustable high-power BEC and a compact size, the Spektrum Firma 30-amp Sensored Brushless ESC and Motor Combo is tailored to elevate your off-road experience to new heights.
Features
- Developed and designed by Spektrum engineers in partnership with the industry's leading ESC manufacturer
- Multi-point protection system including:
- Over-current protection
- Automatic LiPo low-voltage cutoff
- Thermal protection
- Failsafe protection
- Includes high-performance Spektrum Firma 2800Kv Sensored Brushless Motor
- Waterproof with details available in instructions
- Compact design for easy installation in various applications
- Ready to install with no soldering required
- Aluminum construction for efficient heat dissipation
- Adjustable high-power BEC for versatile power management
- Compatible with 2S and 3S LiPo batteries
- Designed specifically for crawling applications
- Dimensions:
- Height: 2 inches (51 mm)
- Width: 3 inches (76 mm)
- Length: 4.2 inches (107 mm)
- Motor Type: Brushless with a Kv rating of 2800
- Maximum Continuous Current: 30A / 80A
- Weight: 2.7 ounces
- Shaft Length: 0.54 inches (13.7 mm)
- Shaft Diameter: 2.3 inches (58 mm)
- Number of Poles: 4
- Connector Type: IC2
Needed to Complete
Specifications
- Product Height: 2" (51 mm)
- BEC Voltage: 6V/7.4V Adjustable
- Number of Poles: 4
- RPM/Volt (Kv): 2800Kv
- Product Width: 3" (76 mm)
- Motor Type: Brushless
- Product Length: 4.2" (107 mm)
- BEC Continuous Current: 4A
- LiPo Compatibility: 2S, 3S
- Number of Cells: 2-3S LiPo, 6-9 Cells NiMH
- Connector Type: IC2
- Shaft Length: 0.54" (13.7 mm)
- Sensored: Yes
- Maximum Continuous Current: 30A / 80A
- Product Application: Crawling
- Product Weight: 2.7oz
- Motor Size: Motor Diameter: 24 mm Length: 45.8 mm
- Shaft Diameter: 2.3" (58 mm)
- Application: 1/16-1/18 Rock Crawler
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