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F4125 300KV SeaDrive-Waterproof Brushless Motor

Big Motors > SeaDrive (Underwater/Industrial)

$48.90
The F4125 300KV waterproof brushless motor is designed for ultra-quiet aquatic applications including aquarium circulation systems, RC boat propulsion, and mini submarine drives.
SKU: 33061
Package weight: 0.35 KG
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F4125 300KV Waterproof Brushless Motor | Aquarium & Marine Toy Motor Specifications

Descriptions

The F4125 300KV waterproof brushless motor is designed for ultra-quiet aquatic applications including aquarium circulation systems, RC boat propulsion, and mini submarine drives. Featuring IP68-rated epoxy potting and a compact form factor, it delivers smooth power output with near-silent operation for sensitive underwater environments.

1. Main Specifications

ParameterSpecification
Motor Type3-Phase Sensorless BLDC
Protection RatingIP68 (3m Depth, 24hrs Submersion)
Rated Voltage14.8V-22.2V DC
Continuous Power323W @ 14.8V / 922W @ 22.2V
Max Thrust2.2kgf (Forward) / 1.0kgf (Reverse)
Speed Range4350-7250 RPM (PWM Adjustable)
Resistance0.12Ω (Phase-to-Phase)
Shaft Diameter2.3mm (Stainless Steel)
Weight310g 
Mounting Pattern15×15mm / 20×20mm

2. Key Features

  • • Silent Operation: Helical skew rotor design reduces noise to <28dB @ 0.5m

  • • Aqua-Safe Construction: FDA-certified non-toxic potting resin for aquatic life

  • • Corrosion Protection: Ceramic shaft bearings + anodized aluminum housing

  • • Plug-and-Play: Integrated 2.4GHz ESC (3A continuous) with reverse protection

  • • Energy Efficient: 88% efficiency at 12V for extended battery runtime

3. Performance Data

Thrust/Power Table (Freshwater @ 25°C)

VoltageNo-Load SpeedMax ThrustCurrent Draw
14.8V4350 RPM1.5kgf0.8A
22.2V7250RPM1.9kgf1.5A

4. Recommended Applications

🐠 Aquarium Systems:

  • • Nano fish tank water circulators

  • • Automatic feeder agitators

  • • Protein skimmer drives

🚤 Marine Toys:

  • • 1/30 scale RC boat thrusters

  • • Mini submarine dive systems

  • • Floating drone stabilizers

5. Thermal Characteristics

  • • Continuous Operation: 45°C @ 25°C ambient

  • • Thermal Protection: Soft-cutoff at 60°C (auto-reset after cooling)

  • • Storage Conditions: -20℃ ~ +60℃, <85% RH
    Note: All performance data measured in static freshwater. Saltwater use requires bi-weekly bearing maintenance.

 

Frequently Asked Questions

What VESC current rating do I need for my motor?
Choose by your motor’s phase-current demand and application. 200A–500A VESC controllers suit ebikes, scooters and light robotics; 1000A-class units power high-performance eskate, EUCs and small EVs; 2000A controllers target electric motorcycles and industrial drives. Always leave headroom above your battery’s fully-charged voltage.
Do you offer OEM/ODM customization for VESC controllers?
Yes. ChatRobotic is an ISO 9001 and ISO 14001 certified manufacturer providing OEM/ODM VESC controllers, custom firmware, enclosure design and PCB assembly for 200A–2000A applications. Contact our engineering team with your specs to start a custom build.
How long is the lead time and which shipping methods do you use?
In-stock VESC controllers are shipped via DHL/FedEx after payment is received. Delivery time depends on the shipping method: DHL/FedEx priority express 3–5 business days, economy express 4–6 business days, registered post 8–20 business days, worldwide. OEM/ODM and bulk orders are scheduled by customization scope. Logistics tracking is provided after shipment.
Are these VESC controllers compatible with sensored and sensorless motors?
Yes. ChatRobotic VESC controllers support both sensored (hall-sensor) and sensorless BLDC/PMSM motors and work with a wide battery range. FOC, regen braking, throttle curves and telemetry are fully configurable through VESC Tool.