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Castle Creations (CSE)
SKU:CSE010016403
SW4 12.6V 2A BEC Waterproof Sensorless ESC with 1406-6900KV Motor (CSE010016403)
SW4 12.6V 2A BEC Waterproof Sensorless ESC with 1406-6900KV Motor (CSE010016403)
The Sidewinder 4 Waterproof Sensorless ESC with a 1406-6900KV motor is a high‑performance brushless power package designed for 1/10‑scale on‑road cars and select light off‑road setups. The combo pairs a waterproof Sidewinder 4 ESC with a 1406-6900KV motor to deliver confident power from 2S to 3S LiPo packs (6–8 cells NiMH), suitable for vehicles up to about 6.5 pounds. It features a fixed 5.0V BEC at 2A peak, audible fault alerts, and enhanced drag braking, while a splash‑resistant 30mm fan and CRYO‑DRIVE cooling technology help keep temperatures down for longer, more consistent runs.
Note that the 1406-6900KV motor is sensored, but the Sidewinder 4 ESC is sensorless, so motor sensor information cannot be utilized with this combo. If true sensored operation is required, pair the motor with a sensored ESC such as the Mamba X. This setup is not intended for 2WD or 4WD short‑course trucks and should not be operated while submerged; if used in wet conditions, rinse with fresh water and dry. Six common ESC settings can be adjusted from the transmitter, and software updates are available via Windows Castle Link (USB adapter) or Field Link Card, with Telemetry Link compatibility for Futaba S.BUS2. It’s ideal for 1/10‑scale on‑road cars and lighter off‑road rigs with conservative gearing.
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Parts List
Product Manual
Product Manual

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Overview
The SW4 12.6V 2A BEC Waterproof Sensorless ESC with 1406-6900KV Motor is a high-performance combo that is designed for serious hobbyists looking to enhance their driving experience. This product includes the Sidewinder 4 waterproof sensorless electronic speed control (ESC) paired with a powerful 1406-6900KV motor.
This versatile ESC supports 2s to 3s LiPo and 6 to 8 cell NiMH batteries, making it compatible with vehicles weighing up to 6.5 pounds, ready to run right out of the box. It operates with both sensorless brushless and brushed motors, ensuring flexibility for different setups. The waterproof design of the ESC and the splash-resistant 30MM fan enhance durability and performance in various conditions.
Featuring a 5.0 volts fixed, 2 amps peak BEC, this ESC provides reliable power supply for your components. Users will appreciate the audible alerts that inform them of potential error conditions, along with enhanced drag brake functionality for better control during descents. The Sidewinder 4 offers smoother sensorless startups and convenient transmitter programming for six adjustable settings, allowing for easy customization based on personal preference.
Additional settings and software updates can be accessed via the Castle Link software and USB adapter, available for separate purchase. It is also compatible with Telemetry Link for Futaba S.BUS2, allowing for advanced data monitoring. The CRYO-DRIVE technology integrated into the Sidewinder 4 significantly improves thermal performance, resulting in cooler temperatures, longer run times, and more power.
Ideal for a variety of applications, this combo excels whether tackling dirt, navigating corners, or dominating trails. The 1406-6900KV motor serves as an excellent upgrade for 1/10th scale on-road cars using 2s batteries. While it can fit some lighter off-road 1/10th stadium trucks and buggies with conservative gearing, it is not suitable for 2WD or 4WD short course trucks. Please consult the Gearing Chart for recommended configurations for popular vehicles.
Note that the sensored capabilities of the motor cannot be utilized with the Sidewinder 4 ESC. For those requiring sensored operation, a compatible sensored ESC like the Mamba X is recommended. This product is not intended for operation while submerged in water; however, if used in wet conditions, rinsing with fresh water to remove dirt or corrosives followed by thorough drying is advised.
Features
- Compatible with 2s - 3s LiPo and 6 - 8 cell NiMH batteries
- Designed for vehicles weighing up to 6.5 lbs, ready-to-run
- Supports sensorless brushless and brushed motor operation
- Waterproof ESC design with splash resistant 30MM fan
- 5.0 volts fixed, 2 amps peak BEC for reliable power supply
- Audible alerts for error conditions
- Enhanced drag brake functionality for improved control
- Smoother sensorless startups for better performance
- Convenient transmitter programming for six adjustable settings
- Access to additional settings and software updates via Castle Link software (sold separately)
- Telemetry Link compatible for Futaba S.BUS2 (sold separately)
- Incorporates CRYO-DRIVE technology for improved thermal performance
- Motor best suited for 1/10th scale on-road cars using 2s batteries
- Not intended for use in 2WD or 4WD short course trucks
- Rinse and dry unit after use in wet conditions to maintain functionality
Needed to Complete
- Castle Link software and USB adapter (sold separately)
- Field Link Card (sold separately)
- Telemetry Link for Futaba S.BUS2 (sold separately)
Specifications
- Product Type: SW4 12.6V 2A BEC Waterproof Sensorless ESC with 1406-6900KV Motor
- Model Number: CSE010016403
- ESC Voltage Range: 2s - 3s LiPo; 6 - 8 cell NiMH
- Vehicle Weight Capacity: Up to 6.5 lbs (with battery)
- Motor Type: Sensorless brushless and/or brushed motor
- ESC Design: Waterproof with splash resistant 30MM fan
- BEC Output: 5.0 volts fixed, 2 amps peak
- Alerts: Audible alerts for error conditions
- Drag Brake Functionality: Enhanced drag brake functionality
- Startup Type: Smoother sensorless startups
- Programming: Convenient transmitter programming for six adjustable settings
- Software Compatibility: Additional settings and software updates via Castle Link (sold separately)
- Telemetry Compatibility: Telemetry Link for Futaba S.BUS2 (sold separately)
- Technology: CRYO-DRIVE for improved thermal performance
- Suggested Use: Ideal for 1/10th scale on-road cars using 2s batteries
- Restrictions: Not for use in 2WD or 4WD short course trucks
- Maintenance: Rinse with fresh water and dry after exposure to wet conditions
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