EMAX ECO II 4720 Brushless Motor 380KV
by EMAX

The EMAX ECO II 4720 Brushless Motor (380KV) is a high-output, large-scale FPV and UAV brushless motor designed for heavy-lift aerial platforms, commercial sUAS airframes, and 15-inch propeller aircraft setups. Built on EMAX's durable ECO II architecture, this 4720-class motor is engineered to handle high-load continuous operation on 6S to 8S LiPo power systems.

Constructed with a 12N14P stator framework, multi-strand windings, an anodized structural housing, an 8mm bearing shaft, and a durable steel main shaft, the motor delivers up to 2420W of continuous power and 72A peak current. Outfitted with an M6 threaded propeller shaft, 360mm heavy-duty 13AWG silicone leads, and a standard 30x30mm M4 mounting pattern, the ECO II 4720 380KV provides reliable torque, smooth throttle response, and high efficiency for long-range and cinematic heavy-rig drones.

Key Features

• 4720-Class Heavy-Lift Performance: Engineered for large FPV aircraft, commercial UAVs, and 15-inch propeller propulsion systems.

• 6S–8S Voltage Rating (380KV): Optimized for 6S to 8S power configurations, outputting up to 2420W maximum power.

• Robust Hardware Construction: Features an 8mm bearing shaft, precision steel main shaft, multi-strand windings, and an anodized finish for high thermal stability.

• Extended Lead Wires: Pre-wired with 360mm 13AWG silicone wires for clean, direct connection to large-frame ESCs.

• Standard 30x30mm Mount: Features 4 x M4 mounting holes for universal integration on heavy-lift drone arms.

Technical Specifications

• Brand / Manufacturer: EMAX

• Model Series: ECO II 4720

• KV Rating: 380KV

• Stator Dimensions: 47 mm x 20 mm

• Overall Motor Dimensions: 55.1 mm (Diameter) x 71 mm (Length)

• Stator Architecture / Framework: 12N14P

• Operating Voltage Range: 6S – 8S LiPo

• Recommended Propeller Size: 15-inch (e.g., HQ 15x7 3-blade)

• Maximum Continuous Power: 2420 W

• Peak Current: 72 A

• Idle Current: 2.4 A @ 10 V

• Internal Resistance: 32 mΩ

• Bearing Shaft Diameter: 8 mm

• Propeller Adapter Thread: M6 CW Shaft Thread

• Mounting Hole Pattern: 30 mm x 30 mm (4 x M4 Threaded Holes)

• Lead Wire Gauge & Length: 13 AWG Silicone Wire, 360 mm

• Net Weight: 324 grams (without silicone wires)

What Is Included

• (1) EMAX ECO II 4720 Brushless Motor (380KV)

• (4) M4 x 14 mm Screws

• (1) Steel M6 Nyloc Nut

• (1) Propeller Washer / Paddle Gasket