ClassA Motor
BLDC MotorSunnySky X-S multirotor power series · Ø89.3 mm

X8020S KV120

8020 120 KV drone motor from SunnySky for 12S: up to 21374 g thrust with a EOLO CN32*11 prop.

Manufacturer datasheet: SunnySky · X8020S KV120 ↗ (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
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How this motor is made

Full manufacturing overview: 70 mm Outer-rotor BLDC Motor →

Ø89.3 mm frame; built with the same process as the 70 mm outer-rotor reference series.

Assembly steps
12
Equipment types
14
BOM lines
13
PRD suppliers
85
  1. 1. Stator lamination stamping & interlocking
  2. 2. Stator powder coating
  3. 3. Outer-stator winding
  4. 4. Terminal soldering
  5. 5. Stator in-process test
  6. 6. Trickle impregnation (optional)
  7. 7. Stator mounting & Hall board
  8. 8. Rotor cup assembly
  9. 9. Magnetizing
  10. 10. Rotor balancing
  11. 11. Final assembly
  12. 12. End-of-line test

Export certification: Low-voltage motor without electronics

Rated power
5.69 kW
Rated torque
11.1 N·m
Rated speed
4,906 rpm
Rated efficiency
91.2 %

Performance curves

Right axis:
02,0004,0006,000020406080100050100150Torque (N·m)Speed (rpm)Efficiency (%)Rated point
SpeedEfficiency (right axis)

Calculated with the linear DC-motor model (constant 44.4 V supply, ignoring resistance rise with temperature).

Full specifications

General

Motor type
BLDC Motor
Series
SunnySky X-S multirotor power series
Frame / flange
Ø89.3 mm

Rated Values

Rated voltage
44.4 V
Rated power
5.69 kW
Rated torque
11.1 N·m
Rated speed
4,906 rpm
Rated current
141 A

Performance

Stall torque
141 N·m
No-load speed
5,324 rpm
Rated efficiency
91.2 %
Peak efficiency
94.5 %

Electrical

Torque constant Kt
0.0796 N·m/A
Back-EMF constant Ke
8.33 V/krpm
Resistance
0.025 Ω
Inductance
0.05 mH
No-load current
1.4 A
Stall current
1,776 A
Poles
28
Electrical time constant
2 ms
Mechanical time constant
0.173 ms

Mechanical

Rotor inertia
437 g·cm²
Body length
46 mm
Weight
0.78 kg
Power density
7,296 W/kg
Insulation class
B
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.

ModelMakerMotor typeSupplyCont. / peak currentFeedback
PDZ1-150-L4-CStonker MotorBLDC, Servo36–60 V DC150 A / 350 ASensorless, Hall sensors, Incremental encoder
P2DZ1-150/80-L4-CStonker MotorBLDC, Servo36–60 V DC150 A / 250 ASensorless, Hall sensors, Incremental encoder
PDZ1-200-L4-CStonker MotorBLDC, Servo36–60 V DC200 A / 650 ASensorless, Hall sensors, Incremental encoder

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