EMAX E3 3115 Brushless Motor 400KV 640KV 900KV 1050KV – Emax USA

EMAX E3 3115 Brushless Motor

The EMAX E3 3115 is a high-efficiency, compact brushless motor engineered for long-range FPV cruisers, 5" cinewhoops, and UAV platforms running 8"–10" 3-blade propellers on 4S to 12S battery configurations. Built around a 12N14P stator with a Ø38.8 × 48.6mm profile, 5mm steel shaft with M5 prop adapter thread, and a tight 4×M3 Ø19mm bolt circle, the E3 3115 fits a wide range of airframes while delivering up to 2195W peak power. Four KV options from 400KV to 1050KV cover everything from high-voltage 12S long-range builds to punchy 4S platforms. Al 7075 anodized construction with G1 precision bearings and single-strand winding for smooth, reliable power.

Key Features

• Stator configuration: 12N14P
• Available KV ratings: 400KV / 640KV / 900KV / 1050KV
• Optimized for 8"–10" 3-blade propellers on 4S–12S builds
• 5mm steel bearing shaft with CW thread
• M5 prop adapter shaft thread
• 4×M3 Ø19mm bolt circle mounting pattern
• 270mm 18AWG silicone wire leads
• G1 precision bearings, Al 7075 anodizing
• Single-strand winding for smooth power delivery

KV / Cell / Propeller Guide

• 400KV — 10–12S — 10" 3-blade (GF1050, HQ1050) | Max Power: 1728W @ 12S
• 640KV — 6–8S — 10" 3-blade (GF1050, HQ1050) | Max Power: 1888W @ 8S
• 900KV — 4–6S — 8"–10" 3-blade (HQ9050, GF1050, HQ1050) | Max Power: 1910W @ 6S
• 1050KV — 4–6S — 8"–9" 3-blade (GF9045, HQ9050) | Max Power: 2195W @ 6S

Specifications

• Motor Model: E3 3115
• Framework: 12N14P
• Dimensions: Ø38.8 × 48.6mm
• Weight (W/O silicone wire): 400KV=109g / 640KV=111g / 900KV=108g / 1050KV=110g
• Bearing Shaft: 5mm
• Prop Adapter Shaft Thread: M5
• Shaft Thread: CW
• Lead: 18AWG 270mm silicone wire
• Mounting: 4×M3, Ø19mm bolt circle
• KV Options: 400KV / 640KV / 900KV / 1050KV
• Peak Current (400KV @ 12S): 36A | Max Power: 1728W
• Peak Current (640KV @ 8S): 59A | Max Power: 1888W
• Peak Current (900KV @ 6S): 77A | Max Power: 1925W
• Peak Current (1050KV @ 6S): 88A | Max Power: 2200W

Package Includes

• 5× M3×10 screws
• 1× Aluminum M5 nylock nut
• 1× Washer and screw for shaft