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Technical Specifications
Last Updated: 2026-10-25
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | KST-0308 |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
208.20 oz-in
14.99 kg-cm
1.5 N-m
7.4V
180.44 oz-in
12.99 kg-cm
1.3 N-m
6.0V
138.80 oz-in
9.99 kg-cm
1.0 N-m
Top 10%
|
| Speed |
8.4V
0.05 sec/60°
1,200.0 deg/s
200.0 RPM
7.4V
0.06 sec/60°
1,000.0 deg/s
166.7 RPM
6.0V
0.07 sec/60°
857.1 deg/s
142.9 RPM
Above Average
|
| Physical | |
| Weight | 1.59 oz45.0 gBottom 10% |
| Dimensions |
L 1.398 in W 0.591 in H 1.398 in L 35.5 mm W 15.0 mm H 35.5 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Brushless |
| Gears | Steel |
| Gear Spline/Teeth | 25 T estimate |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 100° |
| Pulse Cycle | 1.7857 ms |
| Pulse Width | 450-1050 µs |
| Neutral Position | 760 µs |
| Refresh Rate | 560 Hz |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Programmable | Yes |
| Signal Voltage | 3.3–5V |
| Electrical & Environment | |
| Operating Voltage | 6–8.4 V |
| Temperature | -10–65 °C14–149 °F |
| Connectivity | |
| Connector | JR (Universal) estimate |
| 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 | Top 10% Stronger than 91% of 290 Digital Mini servos at 6.0V |
| Speed | Above Average Faster than 89% of 293 Digital Mini servos at 6.0V |
| Weight | Bottom 10% Lighter than 4% of 505 Digital Mini servos |
Performance Analysis
| Shaft Power | 3.67–7.70 W |
| Power Density | 6.674 W/in³ More power-dense than 93% of 482 Digital Mini servos |
| Torque Density | 3.0844 oz-in/g Stronger than 73% of 286 Digital Mini servos |
| Torque-to-Volume Ratio | 120.32 oz-in/in³ Denser torque than 76% of 288 Digital Mini servos |
| Speed-to-Weight | 0.31746 (1/sec·g) Faster than 48% of 289 Digital Mini servos |
| Speed-Torque Trade-off | 9.72 Better balanced than 66% of 288 Digital Mini servos |
| Torque Gain per Volt | 20.83%/V More voltage-responsive (torque) than 74% of 257 Digital Mini servos |
| Speed Gain per Volt | 16.67%/V More voltage-responsive (speed) than 53% of 262 Digital Mini servos |
| Voltage Range Width | 2.4 V Wider voltage range than 53% of 405 Digital Mini servos |
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Reviews (6)
Includes 6 reviews aggregated from around the web.
There are few reviews for this servo on the web. All four reviews on one retailer's listing are five stars. Owners report it eliminated tail wag on a TB40 when paired with a flybarless controller, keeps the tail rock solid on a Raw 420, and a buyer who bought it for an OMP M5 build says the brand has worked without issues in most of their builds.
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