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Technical Specifications
Last Updated: 2026-10-10
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | KST-A12-S |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
190.99 oz-in
13.75 kg-cm
1.3 N-m
7.4V
181.14 oz-in
13.04 kg-cm
1.3 N-m
6.0V
155.59 oz-in
11.20 kg-cm
1.1 N-m
Top 10%
|
| Speed |
8.4V
0.08 sec/60°
750.0 deg/s
125.0 RPM
7.4V
0.09 sec/60°
666.7 deg/s
111.1 RPM
6.0V
0.11 sec/60°
545.5 deg/s
90.9 RPM
Average
|
| Physical | |
| Weight | 1.13 oz32.0 gBelow Average |
| Dimensions |
L 1.181 in W 0.472 in H 1.398 in L 30.0 mm W 12.0 mm H 35.5 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Coreless |
| Gears | Steel |
| Gear Spline/Teeth | 25 T |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 120° |
| Pulse Cycle | 3.003 ms |
| Pulse Width | 900-2100 µs |
| Neutral Position | 1520 µs |
| Dead Band | 1 µs |
| Refresh Rate | 333 Hz |
| Angle Sensor | Hall Effect |
| Control System | PWM |
| Electrical & Environment | |
| Operating Voltage | 6–8.4 V |
| Temperature | -10–60 °C14–140 °F |
| Connectivity | |
| Connector | JR (Universal) estimate |
| Wire Length | 150 mm5.91 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 | Top 10% Stronger than 93% of 262 Digital Mini servos at 6.0V |
| Speed | Average Faster than 58% of 263 Digital Mini servos at 6.0V |
| Weight | Below Average Lighter than 23% of 466 Digital Mini servos |
Performance Analysis
| Shaft Power | 2.62–4.41 W |
| Power Density | 5.661 W/in³ More power-dense than 88% of 440 Digital Mini servos |
| Torque Density | 4.8622 oz-in/g Stronger than 91% of 258 Digital Mini servos |
| Torque-to-Volume Ratio | 199.53 oz-in/in³ Denser torque than 92% of 262 Digital Mini servos |
| Speed-to-Weight | 0.28409 (1/sec·g) Faster than 36% of 259 Digital Mini servos |
| Speed-Torque Trade-off | 17.11 Better balanced than 90% of 261 Digital Mini servos |
| Torque Gain per Volt | 9.48%/V More voltage-responsive (torque) than 7% of 232 Digital Mini servos |
| Speed Gain per Volt | 15.62%/V More voltage-responsive (speed) than 46% of 235 Digital Mini servos |
| Voltage Range Width | 2.4 V Wider voltage range than 59% of 351 Digital Mini servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0008 4th-highest dead-band-to-pulse-width ratio of 77 Digital Mini servos |
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