Spektrum Firma 3900Kv 4-Pole Brushless Motor (SPMXSM3300)

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.

• 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

Firma 3900Kv 4-pole Brushless Motor Specifications:

• 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)

What's in the Box:

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

Firma 3900Kv 4-pole Brushless Motor Requires to Complete:

• Electronic Speed Control such as the Firma 130 Smart ESC

• Brand: Spektrum
• Part No: SPMXSM3300
• Barcode: 605482767832
• Fitment: Option Part
• Fitment: Standard Part