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Technical Specifications
Last Updated: 2026-10-23
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | A20CLS |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
104.18 oz-in
7.50 kg-cm
0.7 N-m
7.4V
94.45 oz-in
6.80 kg-cm
0.7 N-m
6.0V
80.56 oz-in
5.80 kg-cm
0.6 N-m
4.8V
69.45 oz-in
5.00 kg-cm
0.5 N-m
Average
|
| Speed |
8.4V
0.08 sec/60°
750.0 deg/s
125.0 RPM
7.4V
0.09 sec/60°
666.7 deg/s
111.1 RPM
6.0V
0.11 sec/60°
545.5 deg/s
90.9 RPM
4.8V
0.13 sec/60°
461.5 deg/s
76.9 RPM
Average
|
| Physical | |
| Weight | 0.74 oz21.0 gAbove Average |
| Dimensions |
L 0.91 in W 0.47 in H 1.08 in L 23.1 mm W 11.9 mm H 27.4 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Coreless |
| Motor Drive | FET |
| Gears | Copper |
| Gear Spline/Teeth | 25 T |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Direction | Counterclockwise |
| Rotational Range | 180° |
| Mechanical Limit | No Limit |
| Pulse Width | 500-2500 µs |
| Neutral Position | 1520 µs |
| Dead Band | 2 µs |
| Refresh Rate | 333 Hz |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Programmable | Yes |
| Electrical & Environment | |
| Operating Voltage | 4.8–8.4 V |
| Temperature | -15–70 °C5–158 °F |
| Certification | CE | ROHS | FCC |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 190 mm7.48 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 | Average Stronger than 64% of 290 Digital Mini servos at 4.8V |
| Speed | Average Faster than 37% of 293 Digital Mini servos at 4.8V |
| Weight | Above Average Lighter than 69% of 505 Digital Mini servos |
Performance Analysis
| Shaft Power | 0.99–2.41 W |
| Power Density | 5.213 W/in³ More power-dense than 86% of 482 Digital Mini servos |
| Torque Density | 3.3071 oz-in/g Stronger than 79% of 286 Digital Mini servos |
| Torque-to-Volume Ratio | 150.35 oz-in/in³ Denser torque than 87% of 288 Digital Mini servos |
| Speed-to-Weight | 0.36630 (1/sec·g) Faster than 60% of 289 Digital Mini servos |
| Speed-Torque Trade-off | 9.03 Better balanced than 64% of 288 Digital Mini servos |
| Torque Gain per Volt | 13.89%/V More voltage-responsive (torque) than 32% of 257 Digital Mini servos |
| Speed Gain per Volt | 17.36%/V More voltage-responsive (speed) than 56% of 262 Digital Mini servos |
| Voltage Range Width | 3.6 V Wider voltage range than 77% of 405 Digital Mini servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0010 Finer dead band than 76% of 104 Digital Mini servos |
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Reviews (11)
Includes 11 reviews aggregated from around the web.
There are few reviews for this servo on the web. Reddit users report buying it after blowing up two Emax servos, and one says other mid-range servos worked pretty well but lacked torque, which is why he moved up. Another warns to set end points carefully to avoid blowing servos.
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