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Technical Specifications
Last Updated: 2026-11-05
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | 7903 |
| Category | Hobby |
| Performance | |
| Torque |
6.0V
28.32 oz-in
2.04 kg-cm
0.2 N-m
4.8V
24.07 oz-in
1.73 kg-cm
0.2 N-m
Average
|
| Speed |
6.0V
0.15 sec/60°
400.0 deg/s
66.7 RPM
4.8V
0.19 sec/60°
315.8 deg/s
52.6 RPM
Bottom 10%
|
| Stall Current | 0.36–0.45 A360–450 mAAbove Average |
| Physical | |
| Weight | 0.28 oz8.0 gAbove Average |
| Dimensions |
L 0.847 in W 0.433 in H 0.827 in L 21.5 mm W 11.0 mm H 21.0 mm |
| Drivetrain | |
| Motor Type | Brushed |
| Gears | Karbonite |
| Gear Spline/Teeth | 23 T |
| Rotation Mode | Positional |
| Rotation/Support | Single Bearing |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 90° |
| Neutral Position | 1500 µs |
| Control System | PWM |
| Programmable | Yes |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Idle Current | 0.005 A5 mA |
| Connectivity | |
| Connector | JR (Universal) |
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 36% of 349 Digital Micro servos at 4.8V |
| Speed | Bottom 10% Faster than 6% of 347 Digital Micro servos at 4.8V |
| Weight | Above Average Lighter than 75% of 597 Digital Micro servos |
| Stall Current | Above Average Lower draw than 90% of 188 Digital Micro servos |
Performance Analysis
| Shaft Power | 0.23–0.35 W |
| Power Density | 1.152 W/in³ More power-dense than 23% of 563 Digital Micro servos |
| Torque Density | 3.0088 oz-in/g Stronger than 71% of 349 Digital Micro servos |
| Torque-to-Volume Ratio | 79.41 oz-in/in³ Denser torque than 57% of 345 Digital Micro servos |
| Speed-to-Weight | 0.65790 (1/sec·g) Faster than 41% of 347 Digital Micro servos |
| Speed-Torque Trade-off | 4.57 Better balanced than 69% of 345 Digital Micro servos |
| Current-per-Torque Ratio | 0.0187 A/oz-in More efficient than 93% of 98 Digital Micro servos |
| Torque Gain per Volt | 14.71%/V More voltage-responsive (torque) than 34% of 290 Digital Micro servos |
| Speed Gain per Volt | 22.22%/V More voltage-responsive (speed) than 75% of 295 Digital Micro servos |
| Voltage Range Width | 1.2 V Wider voltage range than 27% of 496 Digital Micro servos |
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