Big Motors > SeaDrive (Underwater/Industrial)
The FSM3660 is a high-thrust waterproof brushless motor engineered for professional underwater propulsion systems. With IP68K submersible protection and marine-grade construction, it delivers robust bidirectional thrust for ROVs, AUVs, and heavy-duty aquatic robotics. Features corrosion-resistant titanium components and precision hydrodynamic optimization.
| Parameter | Specification |
| Motor Type | 3-Phase Hall Sensor BLDC |
| Protection Rating | IP68K (200m Depth, 168hrs Submersion) |
| Rated Voltage | 12V-24V DC |
| Continuous Power | 72W @ 12V / 265W @ 24V |
| Max Thrust | 42kgf (Forward) / 35kgf (Reverse) |
| Speed Range | 4250-8450 RPM (Field-Oriented Control) |
| Resistance | 0.008Ω (Phase-to-Phase) |
| Shaft Diameter | 12mm (Titanium Grade 5) |
| Weight | 260g |
| Mounting Pattern | 120mm Flange (ISO 9409-1) |
• Deep-Sea Durability: Laser-welded pressure vessel with double O-ring seals
• Saltwater Immunity: Ceramic-coated windings & zirconium alloy bearings
• Smart Propulsion: Integrated CAN FD interface for thruster cluster control
• High Torque Density: 14-pole rotor design achieves 2.1Nm/kg torque-to-weight ratio
• Active Cooling: Seawater-cooled stator chamber with sacrificial anode
| Voltage | No-Load Speed | Max Thrust | Current Draw |
| 12V | 4250 RPM | 32kgf | 6.5A |
| 16V | 5680 RPM | 42kgf | 8.0A |
| 24V | 8450 RPM | 50kgf* | 11.6A |
• 2000m-rated ROV main thrusters
• Seabed crawler propulsion units
• Underwater docking station actuators
• Dynamic positioning (DP) tunnel thrusters
• Offshore platform stabilization drives
• Unmanned surface vessel (USV) propulsion
• Continuous Operation: 75°C @ 40°C ambient (passive cooling)
• Overload Protection: 3-stage thermal derating (85°C/95°C/105°C)
• Certifications: DNV-ST-0378, ABS Underwater Machinery Approval
Note: All thrust data measured in 3.5% salinity seawater at 5m/s flow. Requires quarterly anti-biofouling treatment in tropical waters.

