Overview
The FrSky ACT 5300 Series MD5312H is a high-voltage coreless servo designed for RC models that require reliable torque, speed, and precise control. It uses a fully CNC-machined aluminum protective case and metal gears, and supports operation up to 8.4V.
Key Features
- Metal gears for durability
- All-aluminum CNC-machined protective case
- High-voltage capability up to 8.4V
- Integrated dual precision ball bearing and potentiometer
Specifications
| Model | ACT MD5312H |
| Series | ACT Coreless 5300 Series High-Voltage Servos |
| Dimension (L×W×H) | 35.5×15×25.3 mm |
| Weight | 41.15 g |
| Horn spline | Φ6 25T |
| Operating voltage range | 4.8~8.4 V |
| Refresh rate | 1520 us / 50 Hz |
| Stall current | 2.7 A @ 6.0 V / 3.5 A @ 7.4 V / 3.9 A @ 8.4 V |
| Torque | Speed @ 6.0 V | 24.4 kgf.cm (338.9 Oz-in) | 0.11 sec/60° |
| Torque | Speed @ 7.4 V | 26.2 kgf.cm (363.8 Oz-in) | 0.09 sec/60° |
| Torque | Speed @ 8.4 V | 30.5 kgf.cm (423.6 Oz-in) | 0.08 sec/60° |
Applications
- RC models requiring high torque and precise servo control
- Robotics and other actuator applications that use a standard RC servo signal (1520 us / 50 Hz)
For compatibility questions (spline, voltage, signal/refresh rate, and fitment), contact support@rcdrone.top or visit https://rcdrone.top/.
Details

Compare the ACT servo family at a glance to pick the series that best matches your model’s torque and size needs.

MD5312H reference specifications cover dimensions, operating voltage (4.8–8.4 V), stall current, and torque/speed ratings at 6.0, 7.4, and 8.4 V.
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