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Technical Specifications
Last Updated: 2026-10-27
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 | 0.005 A5 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 46% of 160 Analog Micro servos at 4.8V |
| Speed | Average Faster than 48% of 160 Analog Micro servos at 4.8V |
| Weight | Average Lighter than 45% of 336 Analog Micro servos |
| Running Current | Above Average Lower draw than 87% of 31 Analog Micro servos at 4.8V |
| Stall Current | Average Lower draw than 40% of 48 Analog Micro servos |
Performance Analysis
| Shaft Power | 0.28 W |
| Power Density | 0.717 W/in³ More power-dense than 31% of 322 Analog Micro servos |
| Torque Density | 2.0111 oz-in/g Stronger than 42% of 160 Analog Micro servos |
| Torque-to-Volume Ratio | 46.53 oz-in/in³ Denser torque than 40% of 160 Analog Micro servos |
| Speed-to-Weight | 0.92593 (1/sec·g) Faster than 55% of 160 Analog Micro servos |
| Speed-Torque Trade-off | 2.17 Better balanced than 46% of 159 Analog Micro servos |
| Current-per-Torque Ratio | 0.0442 A/oz-in More efficient than 46% of 38 Analog Micro servos |
| Idle-to-Running Current Ratio | 0.050 Lower idle draw than 52% of 24 Analog Micro servos |
| No-Load vs Stall Current Spread | 8.00 Narrower current spread than 9% of 23 Analog Micro servos |
| Voltage Range Width | 1.2 V Wider voltage range than 38% of 174 Analog Micro servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0067 Finer dead band than 15% of 42 Analog Micro servos |
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Reviews (1)
Includes 1 review aggregated from around the web.
Users like the low price and easy use in micro:bit, Arduino and small robot kits. The plastic gears and small size limit strength and durability.
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