Discover XQ-Power Servos in Our eBay Store!
Shop Now
Technical Specifications
Last Updated: 2026-10-25
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | 39384S |
| Category | Hobby |
| Performance | |
| Torque |
7.4V
472.00 oz-in
33.99 kg-cm
3.3 N-m
6.0V
472.00 oz-in
33.99 kg-cm
3.3 N-m
Above Average
|
| Speed |
7.4V
0.14 sec/60°
428.6 deg/s
71.4 RPM
6.0V
0.17 sec/60°
352.9 deg/s
58.8 RPM
Below Average
|
| Running Current |
7.4V
0.250 A
250 mA
6.0V
0.250 A
250 mA
Average
|
| Stall Current | 2.1–2.7 A2100–2700 mAAbove Average |
| Physical | |
| Weight | 2.79 oz79.0 gBelow Average |
| Dimensions |
L 1.57 in W 0.79 in H 1.50 in L 39.9 mm W 20.1 mm H 38.1 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Brushless |
| Motor Drive | MOS |
| Gears | Titanium / Steel |
| Gear Spline/Teeth | 25 T |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Backlash | 0.500° |
| Control & Signal | |
| Modulation | Digital |
| Direction | Clockwise |
| Rotational Range | 158° |
| Pulse Width | 900-2100 µs |
| Neutral Position | 1500 µs |
| Dead Band | 1 µs |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Programmable | Yes |
| Signal Voltage | 3-5V |
| Electrical & Environment | |
| Operating Voltage | 6–7.4 V |
| Temperature | -20–60 °C-4–140 °F |
| Water Rating | IP54 |
| Idle Current | 0.027 A27 mA |
| Connectivity | |
| Connector | JR (Universal) estimate |
| Wire Length | 300 mm11.81 in |
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 89% of 1060 Digital Standard servos at 6.0V |
| Speed | Below Average Faster than 26% of 1045 Digital Standard servos at 6.0V |
| Weight | Below Average Lighter than 14% of 1880 Digital Standard servos |
| Running Current | Average Lower draw than 46% of 226 Digital Standard servos at 6.0V |
| Stall Current | Above Average Lower draw than 70% of 570 Digital Standard servos |
Performance Analysis
| Shaft Power | 5.13–6.23 W |
| Power Density | 3.351 W/in³ More power-dense than 64% of 1768 Digital Standard servos |
| Torque Density | 5.9747 oz-in/g Stronger than 88% of 1053 Digital Standard servos |
| Torque-to-Volume Ratio | 253.70 oz-in/in³ Denser torque than 92% of 1058 Digital Standard servos |
| Speed-to-Weight | 0.07446 (1/sec·g) Faster than 9% of 1038 Digital Standard servos |
| Speed-Torque Trade-off | 80.25 Better balanced than 93% of 1034 Digital Standard servos |
| Current-per-Torque Ratio | 0.0057 A/oz-in More efficient than 98% of 331 Digital Standard servos |
| Idle-to-Running Current Ratio | 0.108 Lower idle draw than 33% of 167 Digital Standard servos |
| No-Load vs Stall Current Spread | 10.80 Narrower current spread than 71% of 179 Digital Standard servos |
| Torque Gain per Volt | 0.00%/V More voltage-responsive (torque) than 0% of 873 Digital Standard servos |
| Speed Gain per Volt | 15.32%/V More voltage-responsive (speed) than 49% of 874 Digital Standard servos |
| Voltage Range Width | 1.4 V Wider voltage range than 32% of 1560 Digital Standard servos |
| Backlash-to-Range Ratio | 0.00316 Tighter backlash than 41% of 52 Digital Standard servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0008 Finer dead band than 89% of 504 Digital Standard servos |
Similar Active Servos
Reviews (3)
Includes 3 reviews aggregated from around the web.
There are very few reviews for this servo on the web. A Reddit owner of two says both developed a slight jitter after extended use.
Be the first to review!