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Technical Specifications
Last Updated: 2026-10-23
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | PDI-5521MG |
| Category | Hobby |
| Performance | |
| Torque |
6.0V
282.24 oz-in
20.32 kg-cm
2.0 N-m
4.8V
239.60 oz-in
17.25 kg-cm
1.7 N-m
Average
|
| Speed |
6.0V
0.16 sec/60°
375.0 deg/s
62.5 RPM
4.8V
0.18 sec/60°
333.3 deg/s
55.6 RPM
Below Average
|
| Physical | |
| Weight | 1.96 oz55.6 gAbove Average |
| Dimensions |
L 1.59 in W 0.80 in H 1.74 in L 40.4 mm W 20.3 mm H 44.2 mm |
| Drivetrain | |
| Motor Type | Brushed |
| Gears | Metal |
| Rotation Mode | Continuous |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 360° |
| Pulse Cycle | 3.03 ms |
| Pulse Width | 500-2500 µs |
| Neutral Position | 1500 µs |
| Dead Band | 2 µs |
| Refresh Rate | 330 Hz |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 265 mm10.43 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 | Average Stronger than 55% of 1060 Digital Standard servos at 4.8V |
| Speed | Below Average Faster than 19% of 1045 Digital Standard servos at 4.8V |
| Weight | Above Average Lighter than 75% of 1880 Digital Standard servos |
Performance Analysis
| Shaft Power | 2.46–3.26 W |
| Power Density | 1.474 W/in³ More power-dense than 31% of 1768 Digital Standard servos |
| Torque Density | 4.3094 oz-in/g Stronger than 67% of 1053 Digital Standard servos |
| Torque-to-Volume Ratio | 108.26 oz-in/in³ Denser torque than 47% of 1058 Digital Standard servos |
| Speed-to-Weight | 0.09992 (1/sec·g) Faster than 36% of 1038 Digital Standard servos |
| Speed-Torque Trade-off | 43.13 Better balanced than 69% of 1034 Digital Standard servos |
| Torque Gain per Volt | 14.83%/V More voltage-responsive (torque) than 44% of 873 Digital Standard servos |
| Speed Gain per Volt | 10.43%/V More voltage-responsive (speed) than 21% of 874 Digital Standard servos |
| Voltage Range Width | 1.2 V Wider voltage range than 8% of 1560 Digital Standard servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0010 Finer dead band than 78% of 504 Digital Standard servos |
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Weight: 55.6 grams
Dimensions: 1.594" x 0.795" x 1.496"
Size Class: Standard
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