Overview
FrSky Xact 5800 Series LD5801 is a coreless, high-voltage servo designed for F3K (DLG) and F5K gliders where low profile and low weight are critical. It uses a CNC-machined aluminum protective case with metal gears, supports 3.5V–8.4V wide-voltage operation, and is built for fast response with high precision. When used with the FBUS protocol, the servo can provide telemetry data (e.g., real-time current and voltage) back to a compatible FrSky radio, and settings such as center point and travel angles can be configured on FrSky radios.
Key Features
- For F3K (DLG) / F5K gliders
- Coreless servo design
- Wide operating voltage range: 3.5V–8.4V
- Low profile: 7 mm thickness
- Lightweight: 7.5 g
- High precision with zero slop
- Programmable center-point positions and travel angles (via FrSky radios)
- FBUS telemetry capable (e.g., real-time current, voltage)
- Built-in Hall sensor
- Robust CNC aluminum case with metal gear
For product selection support (including lug style), contact https://rcdrone.top/ or email support@rcdrone.top.
Specifications
| Model | LD5801 |
| Series | Xact Coreless 5800 Series High-Voltage Servos |
| Weight | 7.5 g |
| Dimensions (L x W x H) | 23 x 7 x 18 mm |
| Horn spline | Φ4 15T |
| Operating voltage range | 3.5–8.4 V |
| Stall current | 0.88 A @ 8.4 V |
| Reflash rate | 1520 us / 333 Hz | 760 us / 700 Hz |
| Dead band | 0.001 ms (1 us) |
| Torque tolerance | ±15% |
| Speed tolerance | ±15% |
Performance (Torque / Speed)
| Voltage | Torque | Speed |
|---|---|---|
| @ 4.0 V | 1.90 kgf.cm (26.4 Oz-in) | 0.09 sec/60° |
| @ 4.8 V | 2.20 kgf.cm (30.6 Oz-in) | 0.08 sec/60° |
| @ 6.0 V | 2.90 kgf.cm (40.3 Oz-in) | 0.06 sec/60° |
| @ 7.4 V | 3.40 kgf.cm (47.2 Oz-in) | 0.05 sec/60° |
| @ 8.4 V | 3.80 kgf.cm (52.8 Oz-in) | 0.04 sec/60° |
Mounting Lug Styles (Photo/Style)
- Vertical Lug: 03050651
- Flat Lug: 03050649
Applications
- F3K (DLG) gliders
- F5K gliders
- Other lightweight RC aircraft installations requiring a 7 mm-thick, high-voltage micro servo
Details


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