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Technical Specifications
Last Updated: 2026-10-09
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 |
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 54% of 1043 Digital Standard servos at 4.8V |
| Speed | Below Average Faster than 18% of 1041 Digital Standard servos at 4.8V |
| Weight | Above Average Lighter than 74% of 1902 Digital Standard servos |
Performance Analysis
| Shaft Power | 2.46–3.26 W |
| Power Density | 1.474 W/in³ More power-dense than 31% of 1759 Digital Standard servos |
| Torque Density | 4.3094 oz-in/g Stronger than 66% of 1036 Digital Standard servos |
| Torque-to-Volume Ratio | 108.26 oz-in/in³ Denser torque than 46% of 1042 Digital Standard servos |
| Speed-to-Weight | 0.09992 (1/sec·g) Faster than 35% of 1033 Digital Standard servos |
| Speed-Torque Trade-off | 43.13 Better balanced than 69% of 1031 Digital Standard servos |
| Torque Gain per Volt | 14.83%/V More voltage-responsive (torque) than 43% of 850 Digital Standard servos |
| Speed Gain per Volt | 10.43%/V More voltage-responsive (speed) than 21% of 871 Digital Standard servos |
| Voltage Range Width | 1.2 V Wider voltage range than 8% of 1539 Digital Standard servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0010 Finer dead band than 80% of 468 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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