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Technical Specifications
Last Updated: 2026-10-08
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | FS5103B |
| Category | Hobby |
| Performance | |
| Torque |
6.0V
44.50 oz-in
3.20 kg-cm
0.3 N-m
4.8V
41.70 oz-in
3.00 kg-cm
0.3 N-m
Bottom 10%
|
| 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
Average
|
| Running Current |
6.0V
0.180 A
180 mA
4.8V
0.150 A
150 mA
Above Average
|
| Stall Current | 0.78–0.85 A780–850 mAAbove Average |
| Physical | |
| Weight | 1.43 oz40.5 gAbove Average |
| Dimensions |
L 1.606 in W 0.791 in H 1.496 in L 40.8 mm W 20.1 mm H 38.0 mm |
| Case Material | Nylon |
| Drivetrain | |
| Motor Type | Brushed |
| Gears | Plastic |
| Gear Spline/Teeth | 25 T |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Analog |
| Rotational Range | 180° |
| Pulse Width | 600-2400 µs |
| Neutral Position | 1500 µs |
| Dead Band | 5 µs |
| Control System | PWM |
| Signal Voltage | 3.3V, 5V |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Temperature | -15–70 °C5–158 °F |
| Idle Current | 0.006 A6 mA |
| 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
| Torque | Bottom 10% Stronger than 9% of 192 Analog Standard servos at 4.8V |
| Speed | Average Faster than 49% of 190 Analog Standard servos at 4.8V |
| Weight | Above Average Lighter than 83% of 448 Analog Standard servos |
| Running Current | Above Average Lower draw than 84% of 50 Analog Standard servos at 4.8V |
| Stall Current | Above Average Lower draw than 86% of 64 Analog Standard servos |
Performance Analysis
| Shaft Power | 0.43–0.51 W |
| Power Density | 0.271 W/in³ More power-dense than 10% of 437 Analog Standard servos |
| Torque Density | 1.0296 oz-in/g Stronger than 18% of 192 Analog Standard servos |
| Torque-to-Volume Ratio | 21.94 oz-in/in³ Denser torque than 7% of 192 Analog Standard servos |
| Speed-to-Weight | 0.13717 (1/sec·g) Faster than 73% of 190 Analog Standard servos |
| Speed-Torque Trade-off | 7.51 Better balanced than 7% of 190 Analog Standard servos |
| Current-per-Torque Ratio | 0.0204 A/oz-in More efficient than 32% of 58 Analog Standard servos |
| Idle-to-Running Current Ratio | 0.040 Lower idle draw than 66% of 39 Analog Standard servos |
| No-Load vs Stall Current Spread | 5.67 Narrower current spread than 67% of 37 Analog Standard servos |
| Torque Gain per Volt | 5.60%/V More voltage-responsive (torque) than 3% of 145 Analog Standard servos |
| Speed Gain per Volt | 10.43%/V More voltage-responsive (speed) than 18% of 147 Analog Standard servos |
| Voltage Range Width | 1.2 V Wider voltage range than 23% of 229 Analog Standard servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0028 Finer dead band than 90% of 49 Analog Standard servos |
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