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Firma 3900Kv 4-Pole Brushless Motor

Spektrum SPMXSM3300


$ 5999 $ 6899

Current Inventory: 1

Product Description +

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.

Product 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)

  • Additional Product Details +

    Brand: Spektrum

    MPN: SPMXSM3300

    Added: 2025 - April

    Status: Stock

    Discount Eligibility: Discount Eligible

    SKU: SPMXSM3300

    UPC: 605482767832

    Location: K03-09-12

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