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Technical Specifications
Last Updated: 2026-10-10
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | Fi7621M |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
8.4V
291.70 oz-in
21.00 kg-cm
2.1 N-m
7.4V
247.20 oz-in
17.80 kg-cm
1.7 N-m
|
| Speed |
8.4V
0.14 sec/60°
428.6 deg/s
71.4 RPM
7.4V
0.16 sec/60°
375.0 deg/s
62.5 RPM
|
| Physical | |
| Weight | 1.98 oz56.0 gAbove Average |
| Dimensions |
L 1.583 in W 0.787 in H 1.598 in L 40.2 mm W 20.0 mm H 40.6 mm |
| Drivetrain | |
| Motor Type | Coreless |
| Gears | Metal |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 180° |
| Mechanical Limit | 180° |
| Pulse Width | 500-2500 µs |
| Control System | PWM |
| Programmable | Yes |
| Electrical & Environment | |
| Operating Voltage | 6–8.4 V |
| Water Rating | Water Resistant |
| 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
| Weight | Above Average Lighter than 72% of 1902 Digital Standard servos |
Performance Analysis
| Shaft Power | 2.86–3.85 W |
| Power Density | 1.935 W/in³ More power-dense than 42% of 1759 Digital Standard servos |
| Torque Density | 4.4143 oz-in/g |
| Torque-to-Volume Ratio | 124.17 oz-in/in³ |
| Speed-to-Weight | 0.11161 (1/sec·g) |
| Speed-Torque Trade-off | 39.55 |
| Voltage Range Width | 2.4 V Wider voltage range than 62% of 1539 Digital Standard servos |
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