$650.00

The M500 Motor is a high-power subsea motor built for applications that demand more power and efficiency. Like the M200, it’s based on our thruster technology, but without the propeller or nozzle, making it great for a wide range of applications like vehicle propulsion, actuators, subsea tooling, and more. It comes with a pre-installed WetLink Penetrator for easy installation in your system.

The M500 requires an electronic speed controller (ESC) for operation. We recommend the Basic ESC 500, which is designed for the high-power requirements of the M500 at 24V. For lower power use, the Basic ESC can be used as long as current does not exceed its 30A maximum.

SKU: BR-103168 Category:
HS Code: 8501.32.2000
Country of Origin: USA

Product Description

The M500 Motor is essentially the T500 Thruster, but designed for a wider range of applications. Without a propeller or nozzle, it’s a flexible building block for things like vehicle propulsion for uncrewed surface vessels (USVs) and uncrewed underwater vehicles (UUVs), subsea tooling, gear-trains, actuators, or whatever else you can imagine.

It’s carefully designed to be more rugged, more powerful, and more efficient than the M200 Motor.

M200 next to M500.

Design and Details

Like our thrusters, the M500 is a three-phase brushless motor leveraging our patented flooded design. Water flows throughout the components, so it’s water-cooled, water-lubricated, and inherently pressure tolerant.

The stator is fully encapsulated and electrically isolated from the water. The rotor features rugged construction with high-performance N52 neodymium magnets protected by a stainless steel abrasion shield, preventing damage from debris or sand. High-performance water-lubricated plastic bearings keep things running smoothly, and the body is made from impact-resistant glass-filled polycarbonate.

The M500 base includes four M4 mounting holes, making it easy to attach to frames, hulls, or just about anything you can imagine.
It comes with a 1.5 m cable with a pre-installed WetLink Penetrator for easy connection to a watertight enclosure or other housing.

Getting Started

The M500 requires an electronic speed controller (ESC) for operation. We recommend the Basic ESC 500, designed for the high-power requirements of the M500 at 24V. The Basic ESC can also be used in lower-power applications, as long as current does not exceed its 30A maximum.

You’ll also need a power source like our lithium-ion batteries and a signal source such as the Thruster Commander, an RC radio receiver, a flight controller like the Navigator, or a microcontroller like an Arduino or Raspberry Pi.

Check out the technical details section for full motor specifications and our motor user guide to help get started with operation.

M500 with stainless steel abrasion shield.

Product Description

The M500 Motor is essentially the T500 Thruster, but designed for a wider range of applications. Without a propeller or nozzle, it’s a flexible building block for things like vehicle propulsion for uncrewed surface vessels (USVs) and uncrewed underwater vehicles (UUVs), subsea tooling, gear-trains, actuators, or whatever else you can imagine.

It’s carefully designed to be more rugged, more powerful, and more efficient than the M200 Motor.

M200 next to M500.

Design and Details

Like our thrusters, the M500 is a three-phase brushless motor leveraging our patented flooded design. Water flows throughout the components, so it’s water-cooled, water-lubricated, and inherently pressure tolerant.

The stator is fully encapsulated and electrically isolated from the water. The rotor features rugged construction with high-performance N52 neodymium magnets protected by a stainless steel abrasion shield, preventing damage from debris or sand. High-performance water-lubricated plastic bearings keep things running smoothly, and the body is made from impact-resistant glass-filled polycarbonate.

The M500 base includes four M4 mounting holes, making it easy to attach to frames, hulls, or just about anything you can imagine.
It comes with a 1.5 m cable with a pre-installed WetLink Penetrator for easy connection to a watertight enclosure or other housing.

Getting Started

The M500 requires an electronic speed controller (ESC) for operation. We recommend the Basic ESC 500, designed for the high-power requirements of the M500 at 24V. The Basic ESC can also be used in lower-power applications, as long as current does not exceed its 30A maximum.

You’ll also need a power source like our lithium-ion batteries and a signal source such as the Thruster Commander, an RC radio receiver, a flight controller like the Navigator, or a microcontroller like an Arduino or Raspberry Pi.

Check out the technical details section for full motor specifications and our motor user guide to help get started with operation.

M500 with stainless steel abrasion shield.
  • 1 x M500 Motor with preinstalled WetLink Penetrator
  • 1 x M14 bulkhead O-ring
  • 1 x M14 bulkhead nut

Specifications

ParameterValue
Performance
Depth Rating300 m984 ft
Design Lifetime ¹3 years or 300 cycles to rated depth
Stall Torque (calculated)2.04 N·m1.5 lb⋅ft
Operating Water Temperature (full power @ 24V)2–27°C
Electrical ²
Operating Voltage ³7–24 V
Motor Kv (no load)202 RPM/V
Motor Configuration12 slot, 14 pole
Max Current (Power) @ 24 V (no load)3.3 A (79 W)
Max RPM @ 24 V (no load)4700 RPM
Physical
Length98.45 mm3.875 in
Diameter61 mm2.4 in
Wetted MaterialsStainless steel 316
Polycarbonate 10% glass-filled
Epoxy
POM
Polyurethane
Aluminum 7075-T6
FKM
Buna-N
Weight in Air895 g1.97 lb
Weight in Water641 g1.41 lb
Mounting Hole ThreadsM4 x 0.7
Mounting Hole Spacing35 mm
Cable
Cable TypeT500 Cable (BR-100235)
Cable Length1372±40 mm54±1.57 in
Conductor Length80 mm +20/-103.14 in +0.79/-0.39
Conductor Gauge12 AWG
WetLink PenetratorM14-9.5MM-HC
Bulkhead ThreadM14 x 1.5
Bulkhead O-ringM14 (1.5x15 mm Buna-N 70A)
¹ Design life was used to define accelerated test conditions and does not represent a warranty period.
² Electrical values are typical; actual units may vary within +/-5%. Measured using the Basic ESC 500.
³ The M500 Thruster has a maximum operating voltage of 24 V, equivalent to a fully charged 6S LiPo or Li-ion battery. Continuous full-throttle operation at 24 V should be limited to 1 minute or less to avoid overheating.

2D Drawings

M500 Motor

M500 Motor Drawing

3D Models

M500_MOTOR_BR-103168 (.zip)

Revision History

10 June 2026

  • BR-103168 - Initial release

Quick Start

1. Connect motor wires to ESC phase wires.

2. Connect the ESC to a power source.

3. Connect the ESC signal wire to a signal source.

4. Send 1500μs PWM signal to initialize, then send PWM signal to control speed:

  • 1500µs to initialize and stop the motor
  • >1525µs to 1900µs for forward
  • <1475µs to 1100µs for reverse

Guides

M200 and M500 Motor User Guide
Learn how to use the M200 and M500 Motors!

Support

Blue Robotics Technical Support Form

Relevant Forum Categories

Blue Robotics Forums - Thrusters And Motors