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Technical Specifications
Last Updated: 2026-10-21| Identity | |
| Brand |  |
| Product Number | XQ-S4020D |
| Category | Hobby |
| Performance | |
| Torque |
6.0V
277.80 oz-in
20.00 kg-cm
2.0 N-m
4.8V
238.90 oz-in
17.20 kg-cm
1.7 N-m
Average
|
| Speed |
6.0V
0.13 sec/60°
461.5 deg/s
76.9 RPM
4.8V
0.15 sec/60°
400.0 deg/s
66.7 RPM
Average
|
| Running Current |
6.0V
0.210 A
210 mA
4.8V
0.180 A
180 mA
Average
|
| Stall Current | 2.2–2.45 A2200–2450 mAAbove Average |
| Physical | |
| Weight | 2.03 oz57.5 gAbove Average |
| Dimensions |
L 1.583 in W 0.791 in H 1.528 in L 40.2 mm W 20.1 mm H 38.8 mm |
| Case Material | Plastic / Aluminum |
| Drivetrain | |
| Motor Type | Coreless |
| Gears | Titanium |
| Gear Spline/Teeth | 25 T |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Direction | Counterclockwise |
| Rotational Range | 110° |
| Mechanical Limit | 210° |
| Pulse Width | 800-2200 µs |
| Neutral Position | 1500 µs |
| Dead Band | 2 µs |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Programmable | No |
| Electrical & Environment | |
| Operating Voltage | 4.8–7.2 V |
| Power Source | 2S Li-Po |
| Temperature | -15–60 °C5–140 °F |
| Water Rating | Splashproof |
| Certification | CE |
| Idle Current | 0.009 A9 mA |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 300 mm11.81 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 55% of 1060 Digital Standard servos at 4.8V |
| Speed | Average Faster than 43% of 1045 Digital Standard servos at 4.8V |
| Weight | Above Average Lighter than 68% of 1880 Digital Standard servos |
| Running Current | Average Lower draw than 63% of 226 Digital Standard servos at 4.8V |
| Stall Current | Above Average Lower draw than 79% of 570 Digital Standard servos |
Performance Analysis
| Shaft Power | 2.94–3.95 W |
| Power Density | 2.065 W/in³ More power-dense than 45% of 1768 Digital Standard servos |
| Torque Density | 4.1548 oz-in/g Stronger than 64% of 1053 Digital Standard servos |
| Torque-to-Volume Ratio | 124.86 oz-in/in³ Denser torque than 54% of 1058 Digital Standard servos |
| Speed-to-Weight | 0.11594 (1/sec·g) Faster than 52% of 1038 Digital Standard servos |
| Speed-Torque Trade-off | 35.84 Better balanced than 59% of 1034 Digital Standard servos |
| Current-per-Torque Ratio | 0.0103 A/oz-in More efficient than 78% of 331 Digital Standard servos |
| Idle-to-Running Current Ratio | 0.050 Lower idle draw than 55% of 167 Digital Standard servos |
| No-Load vs Stall Current Spread | 13.61 Narrower current spread than 67% of 179 Digital Standard servos |
| Voltage Range Width | 2.4 V Wider voltage range than 62% of 1560 Digital Standard servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0014 Finer dead band than 56% of 504 Digital Standard servos |
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Reviews (4)
Includes 2 reviews aggregated from around the web.
There are very few reviews for this servo on the web. A builder of a modified 6-DOF robot arm used four of them for elbow, wrist and hand, and an RC forum thread notes many aircraft flyers use the brand and that the price is attractive for what you get.
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rc boats
May 6, 2018Application(s): rudder for rc gas boat/s
Comments: have damaged one , have had a good run with the one thats in my cat (R42)
rcmodeller324
October 8, 2016Application(s): All servos on 88" 3D aircraft.
Comments: These servos are precise and very smooth. I operate them on 6 volt and have lots of torque! High quality and great price