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Technical Specifications
Last Updated: 2026-10-09
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | SPMSA6390 |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
6.0V
66.70 oz-in
4.80 kg-cm
0.5 N-m
4.8V
48.60 oz-in
3.50 kg-cm
0.3 N-m
Below Average
|
| Speed |
6.0V
0.14 sec/60°
428.6 deg/s
71.4 RPM
6.0V
0.14 sec/60°
428.6 deg/s
71.4 RPM
4.8V
0.17 sec/60°
352.9 deg/s
58.8 RPM
Average
4.8V
0.17 sec/60°
352.9 deg/s
58.8 RPM
Average
|
| Physical | |
| Weight | 1.31 oz37.0 gTop 10% |
| Dimensions |
L 1.52 in W 0.74 in H 1.36 in L 38.6 mm W 18.8 mm H 34.5 mm |
| Case Material | Plastic |
| Drivetrain | |
| Motor Type | Coreless Brushed |
| Gears | Nylon |
| Gear Spline/Teeth | 23 T estimate |
| Rotation/Support | Single Bearing |
| Control & Signal | |
| Modulation | Analog |
| Rotational Range | 120° |
| Dead Band | 3 µs |
| Control System | PWM |
| Programmable | No |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 305 mm12.01 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 | Below Average Stronger than 28% of 192 Analog Standard servos at 4.8V |
| Speed | Average Faster than 62% of 190 Analog Standard servos at 4.8V |
| Weight | Top 10% Lighter than 91% of 448 Analog Standard servos |
Performance Analysis
| Shaft Power | 0.53–0.88 W |
| Power Density | 0.576 W/in³ More power-dense than 50% of 437 Analog Standard servos |
| Torque Density | 1.3135 oz-in/g Stronger than 32% of 192 Analog Standard servos |
| Torque-to-Volume Ratio | 31.77 oz-in/in³ Denser torque than 35% of 192 Analog Standard servos |
| Speed-to-Weight | 0.15898 (1/sec·g) Faster than 87% of 190 Analog Standard servos |
| Speed-Torque Trade-off | 8.26 Better balanced than 20% of 190 Analog Standard servos |
| Torque Gain per Volt | 31.04%/V 5th-highest torque gain per volt of 145 Analog Standard servos |
| Speed Gain per Volt | 17.88%/V More voltage-responsive (speed) than 66% of 147 Analog Standard servos |
| Voltage Range Width | 1.2 V Wider voltage range than 16% of 229 Analog Standard servos |
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