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Technical Specifications
Last Updated: 2026-10-20
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | FS90MG |
| Category | Hobby |
| Performance | |
| Torque |
6.0V
30.60 oz-in
2.20 kg-cm
0.2 N-m
4.8V
25.04 oz-in
1.80 kg-cm
0.2 N-m
Average
|
| Speed |
6.0V
0.09 sec/60°
666.7 deg/s
111.1 RPM
4.8V
0.10 sec/60°
600.0 deg/s
100.0 RPM
Above Average
|
| Running Current |
6.0V
0.220 A
220 mA
4.8V
0.190 A
190 mA
Average
|
| Stall Current | 0.7–0.8 A700–800 mAAverage |
| Physical | |
| Weight | 0.44 oz12.5 gAverage |
| Dimensions |
L 0.886 in W 0.476 in H 1.051 in L 22.5 mm W 12.1 mm H 26.7 mm |
| Case Material | Plastic |
| Drivetrain | |
| Motor Type | Brushed |
| Gears | Copper |
| Gear Spline/Teeth | 21 T |
| Rotation Mode | Positional |
| Rotation/Support | Bushing |
| Control & Signal | |
| Modulation | Digital |
| Direction | Bidirectional |
| Rotational Range | 180° |
| Mechanical Limit | 180° |
| Pulse Width | 500-2500 µs |
| Neutral Position | 1500 µs |
| Dead Band | 8 µs |
| Control System | PWM |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Temperature | -15–70 °C5–158 °F |
| Idle Current | 0.005 A5 mA |
| Connectivity | |
| Connector | JR (Universal) estimate |
| Wire Length | 250 mm9.84 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 349 Digital Micro servos at 4.8V |
| Speed | Above Average Faster than 67% of 347 Digital Micro servos at 4.8V |
| Weight | Average Lighter than 40% of 597 Digital Micro servos |
| Running Current | Average Lower draw than 36% of 60 Digital Micro servos at 4.8V |
| Stall Current | Average Lower draw than 65% of 188 Digital Micro servos |
Performance Analysis
| Shaft Power | 0.46–0.63 W |
| Power Density | 1.418 W/in³ More power-dense than 36% of 563 Digital Micro servos |
| Torque Density | 2.0032 oz-in/g Stronger than 31% of 349 Digital Micro servos |
| Torque-to-Volume Ratio | 56.49 oz-in/in³ Denser torque than 27% of 345 Digital Micro servos |
| Speed-to-Weight | 0.80000 (1/sec·g) Faster than 60% of 347 Digital Micro servos |
| Speed-Torque Trade-off | 2.50 Better balanced than 36% of 345 Digital Micro servos |
| Current-per-Torque Ratio | 0.0319 A/oz-in More efficient than 60% of 98 Digital Micro servos |
| Idle-to-Running Current Ratio | 0.026 Lower idle draw than 85% of 42 Digital Micro servos |
| No-Load vs Stall Current Spread | 4.21 Narrower current spread than 89% of 45 Digital Micro servos |
| Torque Gain per Volt | 18.50%/V More voltage-responsive (torque) than 58% of 290 Digital Micro servos |
| Speed Gain per Volt | 9.26%/V More voltage-responsive (speed) than 7% of 295 Digital Micro servos |
| Voltage Range Width | 1.2 V Wider voltage range than 30% of 496 Digital Micro servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0040 Finer dead band than 8% of 182 Digital Micro servos |
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Reviews (7)
Includes 7 reviews aggregated from around the web.
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