FrSky Xact LD5801A Coreless High-Voltage Servo
The FrSky Xact LD5801A is an ultra-thin, lightweight coreless high-voltage servo developed for F3K discus-launch gliders, F5K electric gliders, and other compact RC aircraft installations. It is available with your choice of Flat Lug or Vertical Lug mounting configurations.
Despite weighing only 0.26 oz (7.5 g) and measuring just 0.28 in (7 mm) thick, the LD5801A produces up to 52.8 oz-in (3.8 kgf-cm) of torque with a fast 0.04-second transit time at 8.4 volts.
The LD5801A features a CNC-machined aluminum case, metal gears, a coreless motor, and a Hall-effect position sensor for precise and dependable operation. Its wide 3.5–8.4V operating range allows it to be used with a variety of receiver and power-system configurations.
Choose Your Mounting Style
- Flat Lug — SKU 03050649: Features thin, flat mounting tabs extending horizontally from the sides of the servo.
- Vertical Lug — SKU 03050651: Features raised side mounting ears with circular mounting holes.
Please compare the mounting-style images before ordering to ensure you select the correct version for your aircraft.
FrSky FBUS Support
When connected through a compatible FrSky FBUS system, the servo can provide telemetry information such as real-time voltage and current. Compatible FrSky transmitters can also be used to adjust servo parameters, including center position and travel angle.
Features
- Designed for F3K/DLG and F5K gliders
- Choice of Flat Lug or Vertical Lug mounting styles
- Ultra-thin 0.28 in (7 mm) profile
- Lightweight 0.26 oz (7.5 g) construction
- Wide 3.5–8.4V operating range
- High-speed coreless motor
- CNC-machined aluminum case
- Precision metal gear train
- Built-in Hall-effect position sensor
- High-precision operation with minimal play
- Programmable center position and travel angle
- FBUS telemetry capability
- Supports 1520 μs/333 Hz and 760 μs/700 Hz operation
Specifications
| Model | LD5801A |
| Servo Type | Coreless high-voltage servo |
| Dimensions | 0.91 × 0.28 × 0.71 in (23 × 7 × 18 mm) |
| Weight | 0.26 oz (7.5 g) |
| Operating Voltage | 3.5–8.4V |
| Servo Spline | 4 mm, 15-tooth |
| Stall Current | 0.88A at 8.4V |
| Dead Band | 0.001 ms (1 μs) |
| Refresh Rate | 1520 μs/333 Hz or 760 μs/700 Hz |
| Case | CNC-machined aluminum |
| Gears | Metal |
| Position Sensor | Hall effect |
Torque and Speed
| Voltage | Torque | Speed |
|---|---|---|
| 4.0V | 26.4 oz-in (1.90 kgf-cm) | 0.09 sec/60° |
| 4.8V | 30.6 oz-in (2.20 kgf-cm) | 0.08 sec/60° |
| 6.0V | 40.3 oz-in (2.90 kgf-cm) | 0.06 sec/60° |
| 7.4V | 47.2 oz-in (3.40 kgf-cm) | 0.05 sec/60° |
| 8.4V | 52.8 oz-in (3.80 kgf-cm) | 0.04 sec/60° |
Available Variants
| Mounting Style | Manufacturer Part Number |
|---|---|
| Flat Lug | 03050649 |
| Vertical Lug | 03050651 |
Recommended Applications
- F3K discus-launch gliders
- F5K electric gliders
- Thin glider wings
- Compact RC aircraft installations
- Applications requiring a lightweight, precise servo
Verify the selected mounting style, dimensions, voltage requirements, and servo spline compatibility before installation.