12kW 140KV Sensorless Waterproof BLDC Motor, IP68

140 KV waterproof brushless DC motor with 12 kW power, operating at 28–75.6 V DC and featuring IP68 protection. This outrunner BLDC motor is ideal for electric surfboards, hydrofoils, and RC boats.

Specification

ESC (Electronic Speed Controller) Selection for Waterproof BLDC Motor

• A BLDC motor can be used with an ESC as long as its speed does not exceed the ESC’s limit.
• BLDC motor speed = Battery Voltage × KV value;
  Stator speed = Battery Voltage × KV value × Pole Pairs.
• The maximum speed limit of the V4 series ESC is 60,000 ERPM.
  The maximum speed limit of the V6 series ESC is 150,000 ERPM.
• If a BLDC motor’s maximum speed surpasses the ESC’s limit, it is possible to match them by lowering the motor’s operating voltage. However, this is not recommended, as it prevents the motor from functioning as a true brushless DC motor.

ESC (Electronic Speed Controller) Specification

Note: The ESC model with * is the recommended controller for this page of motor, if you need other ESC models, please contact us.

Dimension (Unit: mm)

Applications

Jet Ski

Propeller

Robot Model

Electric Surfboard

Q: How to make a brushless dc motor waterproof?

A: To make a brushless dc motor waterproof, key steps include sealing the motor housing with gaskets or epoxy, applying waterproof coatings to exposed windings and connections, and using stainless steel or corrosion-resistant materials for hardware. Ensuring all cable entry points are sealed and using an appropriate IP-rated enclosure helps prevent water ingress. For long-term reliability, choose waterproof bearings and regularly inspect seals to maintain protection in wet or underwater environments.