Spektrum Firma 3900kv 4-Pole Brushless Motor

Overview

Spektrum Firma 3900Kv 4-pole Brushless Motor.

Features

• Perfect upgrade for brushed 540- and 550-size brushed motors with the same diameter and mounting pattern (vehicle must accept pinions with a 5mm bore)
• High-quality 4-pole sintered rotors
• Includes 4mm gold plated bullet connectors
• Precision ball bearings and hardened steel 5mm shaft
• SafeD-5 Pinion compatible

Product Information

Great choice for 1/10 Scale 4WD models looking for a high RPM motor upgrade running up to 3S * (12.6v) power. Low cog 4-pole rotor design, CNC machined aluminium housing, insulated high purity copper windings, high-quality alloy steel 5mm output shaft, and high-precision bearings for high durability and smooth rotation. Preinstalled with 4mm gold plated bullet connectors for easy installation. Perfectly matched for the Firma 130 Smart ESC.

*Will work with the 85A Firma ESC, but only for 2S power.

What's in the box?

• (1) Spektrum Firma 3660-3900kv Sensorless 1/10 Brushless Motor with 4mm Gold Plated Bullet Connectors

• (1) Product Manual

What you need

• Electronic Speed Control such as the Firma 130 Smart ESC

Specs

Input Voltage 12.6V

Outer Diameter 1.4" (36 mm)

Shaft Diameter 0.2" (5 mm)

Application 1/10 Scale Surface

Product Length 2.35" (60 mm)

Maximum Continuous Current 45A

Motor Type Brushless

RPM/Volt (Kv) 3900Kv