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Technical Specifications
Last Updated: 2026-07-10
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Identity
Performance
Physical
Drivetrain
Control & Signal
Electrical & Environment
Connectivity
Origin
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Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | ES9251 |
| Category | Hobby |
| Performance | |
| Torque |
4.5V3.75 oz-in0.27 kg-cm0.0 N-m |
| Speed |
4.5V0.08 sec/60°750.0 deg/s125.0 RPM |
| Running Current | (add) |
| Stall Current | (add) |
| Physical | |
| Weight | 0.14 oz4.0 g |
| Dimensions |
L 0.71 in W 0.31 in H 0.66 in L 18.0 mm W 7.9 mm H 16.8 mm |
| Case Material | Plastic |
| Drivetrain | |
| Motor Type | (add) |
| Motor Drive | (add) |
| Gears | Plastic |
| Gear Spline/Teeth | (add) |
| Shaft Size | (add) |
| Rotation Mode | (add) |
| Rotation/Support | (add) |
| Backlash | (add) |
| Control & Signal | |
| Modulation | Digital |
| Direction | Counterclockwise |
| Rotational Range | (add) |
| Mechanical Limit | (add) |
| Pulse Cycle | (add) |
| Pulse Width | 1500-1900 µs |
| Neutral Position | 1500 µs |
| Dead Band | (add) |
| Refresh Rate | (add) |
| Angle Sensor | (add) |
| Control System | (add) |
| Programmable | (add) |
| Signal Voltage | (add) |
| Electrical & Environment | |
| Operating Voltage | 4.5–6 V |
| Power Source | (add) |
| Regulator Type | (add) |
| Temperature | (add) |
| Water Rating | (add) |
| Certification | (add) |
| Idle Current | (add) |
| Connectivity | |
| Connector | JR |
| Wire Length | (add) |
| 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.
Performance Analysis
| Shaft Power | 0.09 W |
| Torque Density | 0.9375 oz-in/g Stronger than 24% of the 22 Nano servos in the database |
| Torque-to-Volume Ratio | 25.69 oz-in/in³ Denser torque than 22% of the 24 Nano servos in the database |
| Power Density | 0.594 W/in³ More power-dense than 32% of the 32 Digital Nano servos in the database |
| Speed-to-Weight | 3.12500 (1/sec·g) Faster than 67% of the 22 Nano servos in the database |
| Speed-Torque Trade-off | 0.30 Better balanced than 30% of the 24 Nano servos in the database |
| Voltage Range Width | 1.5 V Wider voltage range than 56% of the 26 Digital Nano servos in the database |
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