FrSky BLS5405H Xact Brushless HV Digital Servo | 762 oz-in High-Torque Servo for Giant Scale RC Aircraft

ARRIVING JUNE 5, 2026! Order Now!

The FrSky BLS5405H Xact Brushless HV Digital Servo is designed for giant-scale RC pilots who require exceptional torque, precision, and reliability from their flight control system. Delivering an impressive 762 oz-in of torque at 8.4Vand transit speeds as fast as 0.12 sec/60°, the BLS5405H is an outstanding choice for large aerobatic aircraft, IMAC competitors, scale warbirds, and giant-scale sport models.

Built around advanced brushless motor technology, the BLS5405H provides smooth operation, precise centering, excellent holding power, and long service life. Combined with a fully CNC-machined aluminum case, heavy-duty metal gears, dual ball bearings, and Hall sensor technology, this servo is engineered to perform under the demanding loads encountered in today's high-performance RC aircraft. 

SKU: 03050630

Recommended Applications

• 70cc–120cc Giant Scale RC Airplanes
• IMAC Competition Aircraft
• Precision Aerobatic Models
• Large Scale Warbirds
• Giant Scale Sport Aircraft
• High-Load Rudder Installations
• Elevator Servo Applications
• Large Aileron Control Surfaces
• Aircraft Requiring Maximum Torque and Holding Power

Key Features

High-Performance Brushless Motor

The advanced brushless motor design delivers outstanding efficiency, smooth operation, and extended service life compared to conventional brushed servos.

Benefits Include:

• Increased durability
• Reduced wear over time
• Improved efficiency
• Strong holding power
• Consistent performance under load

Massive Torque Output

Producing up to 54.9 kgf·cm (762 oz-in) of torque at 8.4V, the BLS5405H is built to confidently manage large control surfaces and demanding flight conditions.

High-Voltage Operation

Compatible with modern high-voltage aircraft systems, the BLS5405H operates from 4.8V to 8.4V, making it ideal for direct use with regulated HV power systems and 2S receiver battery setups.

Full CNC Aluminum Case

The precision-machined aluminum housing provides exceptional structural rigidity while helping dissipate heat during extended operation.

Heavy-Duty Metal Gear Train

Designed for giant-scale aircraft, the all-metal gear train delivers the durability and strength required for high-load applications.

Hall Sensor Technology

The integrated Hall sensor system provides accurate positioning, excellent centering performance, and long-term reliability without the wear associated with traditional potentiometers.

Dual Precision Ball Bearings

Dual ball bearings support the output shaft for smooth operation, reduced friction, and increased service life.

Multiple Control Protocols

The BLS5405H supports:

• FBUS
• SBUS
• PWM

allowing compatibility with a wide variety of modern FrSky and third-party radio systems.

FBUS Telemetry Support

When connected through a compatible FBUS system, the servo can provide valuable telemetry feedback, including:

• Operating Voltage
• Current Consumption
• Servo Temperature

allowing pilots to monitor servo health in real time.

Adjustable Servo Travel

Servo travel settings of 90°, 120°, and 180° can be configured through supported FrSky systems, providing additional flexibility for specialized aircraft installations.

Technical Specifications

• Operating Voltage: 4.8V–8.4V
• Weight: 77.5g
• Dimensions: 40 × 20 × 33.5 mm
• Output Spline: Φ6 25T
• Maximum Refresh Rate: 333Hz
• Stall Current: 9.1A @ 8.4V

Performance at 8.4V

• Torque: 54.9 kgf·cm (762.4 oz-in)
• Speed: 0.12 sec/60°

Why Choose the FrSky BLS5405H?

For giant-scale pilots seeking a premium brushless servo capable of handling large control surfaces with authority, the FrSky BLS5405H delivers an outstanding combination of torque, precision, durability, and advanced telemetry capability. Whether installed in a 3D aerobatic aircraft, IMAC competition model, or large-scale warbird, the BLS5405H provides the confidence and control serious RC pilots demand.

Legend Hobby Recommended Uses

The FrSky BLS5405H is particularly well suited for rudder and elevator installations on 70cc–120cc aircraft where maximum torque and precise control are essential. For pilots building premium giant-scale aircraft, this servo offers the performance, reliability, and advanced features expected from a top-tier brushless HV servo.