BLDC MotorHobbywing RTF industrial FPV motors · Ø50.8 mm
RTF 4315 520KV
4315 520 KV drone motor from Hobbywing for LiPo-6S: up to 5300 g thrust.
Manufacturer datasheet: Hobbywing · RTF 4315 520KV ↗ (checked 2026-10-18)Maker profile & contacts →
Figures are copied from the maker’s published datasheet; curves are calculated from them. Confirm with the manufacturer before ordering. Not stated on the datasheet, estimated from it: rated point (estimated from KV, voltage and maximum current), inductance, rotor inertia, insulation class, IP rating.
Applications:Drones & UAV
How this motor is made
Full manufacturing overview: 70 mm Outer-rotor BLDC Motor →Ø50.8 mm frame; built with the same process as the 70 mm outer-rotor reference series.
- 1. Stator lamination stamping & interlocking
- 2. Stator powder coating
- 3. Outer-stator winding
- 4. Terminal soldering
- 5. Stator in-process test
- 6. Trickle impregnation (optional)
- 7. Stator mounting & Hall board
- 8. Rotor cup assembly
- 9. Magnetizing
- 10. Rotor balancing
- 11. Final assembly
- 12. End-of-line test
Export certification: Low-voltage motor without electronics
- Rated power
- 735 W
- Rated torque
- 0.641 N·m
- Rated speed
- 10,950 rpm
- Rated efficiency
- 86.9 %
Performance curves
Right axis:
SpeedEfficiency (right axis)
Calculated with the linear DC-motor model (constant 22.2 V supply, ignoring resistance rise with temperature).
Full specifications
General
- Motor type
- BLDC Motor
- Series
- Hobbywing RTF industrial FPV motors
- Frame / flange
- Ø50.8 mm
Rated Values
- Rated voltage
- 22.2 V
- Rated power
- 735 W
- Rated torque
- 0.641 N·m
- Rated speed
- 10,950 rpm
- Rated current
- 38.1 A
Performance
- Stall torque
- 13.5 N·m
- No-load speed
- 11,494 rpm
- Rated efficiency
- 86.9 %
- Peak efficiency
- 87.3 %
Electrical
- Torque constant Kt
- 0.0184 N·m/A
- Back-EMF constant Ke
- 1.92 V/krpm
- Resistance
- 0.03 Ω
- Inductance
- 0.05 mH
- No-load current
- 3.2 A
- Stall current
- 740 A
- Electrical time constant
- 1.67 ms
- Mechanical time constant
- 0.302 ms
Mechanical
- Rotor inertia
- 34 g·cm²
- Body length
- 36.3 mm
- Weight
- 0.267 kg
- Power density
- 2,753 W/kg
- Protection
- IP40
Compatible drivers
All drivers →Drivers whose supply voltage covers this motor and whose continuous current is at least its rated current; drivers from the same maker first. Confirm Hall/encoder type and settings with the maker.
| Model | Maker | Motor type | Supply | Cont. / peak current | Feedback |
|---|---|---|---|---|---|
| ZM-BL24Z50S | Zeming | BLDC | 18–32 V DC | 50 A | Hall sensors, Sensorless |
| MBH24100 | MINE Motor | BLDC | 17–32 V DC | 50 A / 100 A | Hall sensors |
| DEPC-09075-OPEA | ZP Motors | BLDC, Servo | 18–90 V DC | 52 A / 105 A | Hall sensors, Incremental encoder, Absolute encoder |
| DCPC-090100-OPE | ZP Motors | BLDC, Servo | 18–90 V DC | 70 A / 140 A | Hall sensors, Incremental encoder |
| BCPC-09070-OPE/A | ZP Motors | BLDC, Servo | 18–90 V DC | 70 A / 140 A | Hall sensors, Incremental encoder, Absolute encoder |
| BC2PC-090100-OPE/A | ZP Motors | BLDC, Servo | 18–90 V DC | 100 A / 200 A | Hall sensors, Incremental encoder, Absolute encoder |
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