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Technical Specifications
Last Updated: 2026-10-10
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | CYS-S8503 |
| Category | Hobby |
| Performance | |
| Torque |
7.4V
416.70 oz-in
30.01 kg-cm
2.9 N-m
6.0V
361.14 oz-in
26.00 kg-cm
2.6 N-m
Below Average
|
| Speed |
7.4V
0.20 sec/60°
300.0 deg/s
50.0 RPM
6.0V
0.22 sec/60°
272.7 deg/s
45.5 RPM
Below Average
|
| Running Current |
7.4V
0.400 A
400 mA
6.0V
0.300 A
300 mA
Above Average
|
| Stall Current | 3.5–3.9 A3500–3900 mAAbove Average |
| Physical | |
| Weight | 5.43 oz154.0 gAbove Average |
| Dimensions |
L 2.343 in W 1.161 in H 2.02 in L 59.5 mm W 29.5 mm H 51.3 mm |
| Case Material | Metal |
| Drivetrain | |
| Motor Type | 3-pole |
| Gears | Metal |
| Gear Spline/Teeth | 17 T |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Direction | Counterclockwise |
| Rotational Range | 90° |
| Pulse Width | 1000-2000 µs |
| Neutral Position | 1500 µs |
| Dead Band | 4 µs |
| Control System | PWM |
| Electrical & Environment | |
| Operating Voltage | 6–7.4 V |
| Temperature | -10–50 °C14–122 °F |
| Water Rating | Waterproof |
| Idle Current | 0.020 A20 mA |
| Connectivity | |
| Connector | JR (Universal) estimate |
| 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 | Below Average Stronger than 12% of 93 Digital Giant servos at 6.0V |
| Speed | Below Average Faster than 26% of 90 Digital Giant servos at 6.0V |
| Weight | Above Average Lighter than 88% of 174 Digital Giant servos |
| Running Current | Above Average Lower draw than 68% of 29 Digital Giant servos at 6.0V |
| Stall Current | Above Average Lower draw than 83% of 102 Digital Giant servos |
Performance Analysis
| Shaft Power | 3.04–3.85 W |
| Power Density | 0.701 W/in³ More power-dense than 19% of 132 Digital Giant servos |
| Torque Density | 2.3451 oz-in/g Stronger than 31% of 90 Digital Giant servos |
| Torque-to-Volume Ratio | 65.72 oz-in/in³ Denser torque than 28% of 93 Digital Giant servos |
| Speed-to-Weight | 0.02952 (1/sec·g) Faster than 67% of 87 Digital Giant servos |
| Speed-Torque Trade-off | 79.46 Better balanced than 19% of 89 Digital Giant servos |
| Current-per-Torque Ratio | 0.0108 A/oz-in More efficient than 27% of 50 Digital Giant servos |
| Idle-to-Running Current Ratio | 0.067 2nd-highest idle-to-running current ratio of 44 Cys servos |
| No-Load vs Stall Current Spread | 13.00 Narrower current spread than 50% of 27 Digital Giant servos |
| Torque Gain per Volt | 10.99%/V More voltage-responsive (torque) than 44% of 65 Digital Giant servos |
| Speed Gain per Volt | 7.15%/V More voltage-responsive (speed) than 11% of 65 Digital Giant servos |
| Voltage Range Width | 1.4 V Wider voltage range than 21% of 160 Digital Giant servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0040 Finer dead band than 0% of 36 Digital Giant servos |
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