SPEKTRUM SPMXSM3300 Firma 3900Kv 4-Pole Brushless Motor
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
Specifications
Application1/10 Scale SurfaceConnector Type4mm BulletConstant Wattage500-749WInput Voltage2-3S/12.6VIntegrated ESCNoKv Rating3000Kv or moreMaximum Continuous Current45AMotor Class1/10 ScaleMotor Output Lead4mmMotor TypeBrushlessOuter Diameter1.4" (36 mm)Product Length2.35" (60 mm)RPM/Volt (Kv)3900KvSensor TypeSensorlessShaft Diameter0.2" (5 mm)