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Technical Specifications
Last Updated: 2026-09-16
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | FS90 |
| Category | Hobby |
| Performance | |
| Torque |
4.8V18.10 oz-in1.30 kg-cm0.1 N-mAverage |
| Speed |
4.8V0.12 sec/60°500.0 deg/s83.3 RPMAverage |
| Running Current |
6.0V
0.120 A
120 mA
4.8V
0.100 A
100 mA
Above Average
|
| Stall Current | 0.7–0.8 A700–800 mAAverage |
| Physical | |
| Weight | 0.32 oz9.0 gAverage |
| Dimensions |
L 0.913 in W 0.492 in H 0.866 in L 23.2 mm W 12.5 mm H 22.0 mm |
| Case Material | Plastic |
| Drivetrain | |
| Motor Type | Brushed |
| Gears | Plastic |
| Gear Spline/Teeth | 21 T |
| Shaft Size | 4.9 mm |
| Rotation Mode | Positional |
| Rotation/Support | Bushing |
| Control & Signal | |
| Modulation | Analog |
| Direction | Counterclockwise |
| Rotational Range | 120° |
| Mechanical Limit | 180° |
| Pulse Cycle | 20 ms |
| Pulse Width | 900-2100 µs |
| Neutral Position | 1500 µs |
| Dead Band | 8 µs |
| Refresh Rate | 50 Hz |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Signal Voltage | 3-5V |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Temperature | -15–70 °C5–158 °F |
| Idle Current | 5.000 A5,000 mA |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 200 mm7.87 in |
| Origin | |
| Country of Origin | China |
Disclaimer: Most data is sourced from the manufacturer. Some data is sourced from our loyal community and with the help of AI. We aim for accuracy but are not responsible for inaccurate information.
Class Comparison
| Torque | Average Stronger than 50% of 170 Analog Micro servos at 4.8V |
| Speed | Average Faster than 41% of 170 Analog Micro servos at 4.8V |
| Weight | Average Lighter than 37% of 346 Analog Micro servos |
| Running Current | Above Average Lower draw than 84% of 33 Analog Micro servos at 4.8V |
| Stall Current | Average Lower draw than 36% of 54 Analog Micro servos |
Performance Analysis
| Shaft Power | 0.28 W |
| Power Density | 0.717 W/in³ More power-dense than 28% of 333 Analog Micro servos |
| Torque Density | 2.0111 oz-in/g Stronger than 43% of 170 Analog Micro servos |
| Torque-to-Volume Ratio | 46.53 oz-in/in³ Denser torque than 41% of 170 Analog Micro servos |
| Speed-to-Weight | 0.92593 (1/sec·g) Faster than 46% of 170 Analog Micro servos |
| Speed-Torque Trade-off | 2.17 Better balanced than 51% of 169 Analog Micro servos |
| Current-per-Torque Ratio | 0.0442 A/oz-in More efficient than 50% of 45 Analog Micro servos |
| Idle-to-Running Current Ratio | 50.000 Lower idle draw than 9% of 23 Analog Micro servos |
| No-Load vs Stall Current Spread | 8.00 Narrower current spread than 8% of 25 Analog Micro servos |
| Voltage Range Width | 1.2 V Wider voltage range than 36% of 182 Analog Micro servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0067 Finer dead band than 10% of 43 Analog Micro servos |
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