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Technical Specifications
Last Updated: 2026-10-23
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | A2P-S04378525 |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
180.54 oz-in
13.00 kg-cm
1.3 N-m
7.4V
134.71 oz-in
9.70 kg-cm
1.0 N-m
6.0V
123.60 oz-in
8.90 kg-cm
0.9 N-m
4.8V
94.43 oz-in
6.80 kg-cm
0.7 N-m
Above Average
|
| Speed |
8.4V
0.09 sec/60°
666.7 deg/s
111.1 RPM
7.4V
0.11 sec/60°
545.5 deg/s
90.9 RPM
6.0V
0.13 sec/60°
461.5 deg/s
76.9 RPM
4.8V
0.19 sec/60°
315.8 deg/s
52.6 RPM
Bottom 10%
|
| Stall Current | ≤1.1 A≤1100 mAAverage |
| Physical | |
| Weight | 1.01 oz28.7 gBelow Average |
| Dimensions |
L 1.413 in W 1.26 in H 0.394 in L 35.9 mm W 32.0 mm H 10.0 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Cored |
| Gears | Stainless steel |
| Gear Spline/Teeth | 25 T estimate |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 180° |
| Pulse Width | 500-2500 µs |
| Neutral Position | 1520 µs |
| Dead Band | 2 µs |
| Refresh Rate | 333 Hz |
| Angle Sensor | Potentiometer |
| Programmable | Yes |
| Electrical & Environment | |
| Operating Voltage | 4.8–8.4 V |
| Temperature | -20–60 °C-4–140 °F |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 220 mm8.66 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 77% of 40 Digital Slim servos at 4.8V |
| Speed | Bottom 10% Faster than 8% of 41 Digital Slim servos at 4.8V |
| Weight | Below Average Lighter than 13% of 83 Digital Slim servos |
| Stall Current | Average Lower draw than 64% of 29 Digital Slim servos |
Performance Analysis
| Shaft Power | 0.92–3.71 W |
| Power Density | 5.288 W/in³ More power-dense than 77% of 83 Digital Slim servos |
| Torque Density | 3.2902 oz-in/g Stronger than 67% of 40 Digital Slim servos |
| Torque-to-Volume Ratio | 134.62 oz-in/in³ Denser torque than 67% of 40 Digital Slim servos |
| Speed-to-Weight | 0.18339 (1/sec·g) Faster than 3% of 41 Digital Slim servos |
| Speed-Torque Trade-off | 17.94 4th-highest speed-torque trade-off of 40 Digital Slim servos |
| Current-per-Torque Ratio | 0.0116 A/oz-in More efficient than 79% of 704 Hobby servos |
| Torque Gain per Volt | 25.33%/V 1st-highest torque gain per volt of 33 Digital Slim servos |
| Speed Gain per Volt | 30.87%/V 2nd-highest speed gain per volt of 34 Digital Slim servos |
| Voltage Range Width | 3.6 V Wider voltage range than 70% of 75 Digital Slim servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0010 Finer dead band than 57% of 22 Digital Slim servos |
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Reviews (1)
Includes 1 review aggregated from around the web.
There are few reviews for this servo on the web. A German forum member who bought a few about four years ago for wing servos says they are very good, with plenty of strength, little mechanical play and a very small electronic dead zone. Another forum member killed one while trying to program it with a programming adapter.
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