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Technical Specifications
Last Updated: 2026-10-08
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | DS939MG II |
| Category | Hobby |
| Performance | |
| Torque |
6.0V
55.52 oz-in
4.00 kg-cm
0.4 N-m
4.8V
49.97 oz-in
3.60 kg-cm
0.4 N-m
Above Average
|
| Speed |
6.0V
0.14 sec/60°
428.6 deg/s
71.4 RPM
4.8V
0.15 sec/60°
400.0 deg/s
66.7 RPM
Below Average
|
| Physical | |
| Weight | 0.53 oz15.1 gBelow Average |
| Dimensions |
L 0.886 in W 0.453 in H 0.969 in L 22.5 mm W 11.5 mm H 24.6 mm |
| Drivetrain | |
| Gears | Metal |
| Rotation Mode | Positional |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 80° |
| Dead Band | 2 µs |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Power Source | External |
| Regulator Type | Direct |
| Temperature | -20–60 °C-4–140 °F |
| Connectivity | |
| Connector | JR (Universal) estimate |
| Wire Length | 215 mm8.46 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 | Above Average Stronger than 82% of 328 Digital Micro servos at 4.8V |
| Speed | Below Average Faster than 17% of 328 Digital Micro servos at 4.8V |
| Weight | Below Average Lighter than 26% of 620 Digital Micro servos |
Performance Analysis
| Shaft Power | 0.62–0.73 W |
| Power Density | 1.886 W/in³ More power-dense than 49% of 590 Digital Micro servos |
| Torque Density | 3.3093 oz-in/g Stronger than 78% of 327 Digital Micro servos |
| Torque-to-Volume Ratio | 128.49 oz-in/in³ Denser torque than 78% of 327 Digital Micro servos |
| Speed-to-Weight | 0.44150 (1/sec·g) Faster than 10% of 327 Digital Micro servos |
| Speed-Torque Trade-off | 7.50 Better balanced than 86% of 327 Digital Micro servos |
| Torque Gain per Volt | 9.26%/V More voltage-responsive (torque) than 9% of 268 Digital Micro servos |
| Speed Gain per Volt | 5.96%/V More voltage-responsive (speed) than 1% of 273 Digital Micro servos |
| Voltage Range Width | 1.2 V Wider voltage range than 18% of 511 Digital Micro servos |
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