Description
Built for Underwater Missions
The LETUMOTOR 3130 series is a compact, IP68 fully sealed brushless motor purpose-built for underwater robots, ROVs, AUVs, and submersible thruster applications. With a 12N16P high-pole configuration, 220°C winding insulation, and precision-balanced rotor, it delivers smooth, efficient, and reliable propulsion in wet and submerged environments.
Key Specifications
| Parameter | 3130-280KV | 3130-170KV |
|---|---|---|
| Motor Size | Ø37.5 x H54 mm | Ø37.5 x H54 mm |
| Stator Size | Ø31 x H30 mm | Ø31 x H30 mm |
| KV Rating | 280 | 170 |
| Rated Voltage | 24V | 24V |
| No-load Current | 0.45A | 0.35A |
| Internal Resistance | 195 mΩ | 525 mΩ |
| Motor Weight | 205g | 205g |
| Configuration | 12N16P | 12N16P |
| Dynamic Balance | ≤10mg | ≤10mg |
| Bearings | MR126 (686ZZ) | MR126 (686ZZ) |
| Shaft Diameter | 6mm | 6mm |
| Prop Mount | 4x M3-D24 | 4x M3-D24 |
| Motor Mount | 4x M3-D24 | 4x M3-D24 |
| Winding Insulation | 220°C | 220°C |
| Magnet Grade Temp | 150°C | 150°C |
| Withstand Voltage | AC500V | AC500V |
| Protection Level | IP68 | IP68 |
| Lead Type | PCB Solder Board Output | PCB Solder Board Output |
| Max Efficiency Speed | 6000 rpm | 3900 rpm |
| Max Efficiency Current | 5.2A | 2.2A |
| Max Efficiency Torque | 0.17 N·m | 0.11 N·m |
IP68 Built for Underwater Missions
Fully Sealed IP68 Protection: Engineered for continuous submerged operation. The integrated sealed housing blocks water, dust, and debris for reliable long-term underwater performance.
AC500V Dielectric Withstand: High-voltage insulation ensures safe and stable electrical operation in wet and conductive environments.
220°C Winding & 150°C Magnet: High-temperature materials maintain consistent performance under sustained underwater loads.
≤10mg Dynamic Balance: Precision-balanced rotor delivers smooth, low-vibration operation for stable underwater control and extended service life.
MR126 (686ZZ) Bearings: Premium dual-shielded bearings provide smooth, low-noise rotation and long service life in submerged conditions.
Smooth, Efficient Underwater Drive
12N16P High Pole-Count Design: Stable magnetic structure ensures smooth rotation, low cogging, and reliable performance in precision underwater maneuvers.
6mm Precision Steel Shaft: Delivers reliable torque transfer and long service life in demanding subsea environments.
Compact 37.5 x 54mm Body: Small footprint and short length make integration simple in tight underwater spaces.
PCB Solder Board Output: Direct solder board connection for clean wiring and easy system integration.
Two KV Options for Flexible System Matching
3130-280KV: Optimized for higher speed and efficiency — ideal for light to medium payload ROVs and underwater robots.
3130-170KV: Optimized for higher torque at lower RPM — ideal for heavy payload or low-speed precision underwater missions.
Ideal Applications
ROVs (Remotely Operated Vehicles)
AUVs (Autonomous Underwater Vehicles)
Underwater robotic thrusters and manipulators
Submersible inspection and survey platforms
DIY marine and underwater robotics projects
Customization & Bulk Orders
We understand that off-the-shelf specs don’t fit every underwater project.
Available customizations include:
Custom KV winding
Shaft diameter and length modifications
Mounting pattern adjustments
Lead length and connector type (including wet-mate connectors)
Bell housing color and laser-engraved logo
Contact our engineering team with your requirements for a tailored solution and volume pricing.
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