Home / RC Car Parts & Accessories / Spektrum Accessories Firma 3900Kv 4-Pole Brushless Motor
  • Spektrum Accessories Firma 3900Kv 4-Pole Brushless Motor
  • Spektrum Accessories Firma 3900Kv 4-Pole Brushless Motor
  • Spektrum Accessories Firma 3900Kv 4-Pole Brushless Motor
  • Spektrum Accessories Firma 3900Kv 4-Pole Brushless Motor
  • Spektrum Accessories Firma 3900Kv 4-Pole Brushless Motor
  • Spektrum Accessories Firma 3900Kv 4-Pole Brushless Motor

Spektrum Accessories Firma 3900Kv 4-Pole Brushless Motor

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  • Detail

    Overview

    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 aluminum 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.

    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 Specs

    Application
    1/10 Scale Surface
    Connector Type
    4mm Bullet
    Constant Wattage
    500-749W
    Input Voltage
    2-3S/12.6V
    Integrated ESC
    No
    Kv Rating
    3000Kv or more
    Maximum Continuous Current
    45A
    Motor Class
    1/10 Scale
    Motor Output Lead
    4mm
    Motor Type
    Brushless
    Outer Diameter
    1.4" (36 mm)
    Product Length
    2.35" (60 mm)
    RPM/Volt (Kv)
    3900Kv
    Sensor Type
    Sensorless
    Shaft Diameter
    0.2" (5 mm)
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