FrSky RB-25S Dual Power & Triple Receiver Redundancy Bus with Advanced Stabilisation

The FrSky RB-25S is a compact, professional-grade redundancy bus designed to deliver maximum reliability for demanding RC aircraft. Building on the success of FrSky's trusted Redundancy Bus Series, the RB-25S combines dual power input, triple receiver redundancy, advanced stabilisation, and comprehensive telemetry into a lightweight unit ideal for high-performance models where space is at a premium.

Designed for ultimate flight safety, the RB-25S automatically manages redundant receiver signals and dual power sources to ensure uninterrupted control. Its ADV Stabiliser offers significantly enhanced functionality over traditional gyro systems, providing configurable stabilised outputs and multiple advanced flight modes for precision flying.

With support for FBUS, SBUS and S.Port, built-in altitude and vertical speed telemetry, and compatibility with external power switches, the RB-25S is the ideal solution for large aerobatic aircraft, scale models, turbines, helicopters and UAVs requiring maximum reliability.

Key Features

• Compact dual power redundancy bus
  
• Triple receiver redundancy for enhanced flight safety
  
• Dual XT30 power inputs with automatic load balancing
  
• Built-in ADV Advanced Stabilisation System
  
• Multiple flight modes including Stabilisation, Auto-Level, Hover and Knife-Edge
  
• Configurable stabilised output channels
  
• Automatic FBUS, SBUS and S.Port recognition
  
• Built-in altitude and vertical speed telemetry
  
• Compatible with FBUS and S.Port devices
  
• Built-in power switch function
  
• Supports optional NFC and Pin Plug external switches
  
• External LED indicator support
  
• Lightweight compact design
  
• Designed for demanding RC aircraft installations

Perfect For

• Giant-scale RC aircraft
  
• Scale aircraft
  
• Precision aerobatic models
  
• 3D aircraft
  
• Turbine jets
  
• RC helicopters
  
• UAV platforms
  
• Competition aircraft
  
• Pilots requiring receiver redundancy
  
• Compact installations with advanced functionality

Product Summary

The FrSky RB-25S combines triple receiver redundancy, dual power balancing and advanced stabilisation in a compact package. Featuring integrated telemetry, flexible FBUS compatibility and intelligent power management, it provides an exceptionally reliable solution for serious RC pilots seeking maximum safety and performance.

Specifications

• Model: RB-25S
  
• Receiver Redundancy: Triple Receiver
  
• Power Input: Dual XT30
  
• Power Management: Dual Power Balancing
  
• Configurable Channels: 18
  
• Output Types: PWM, FBUS, S.Port, SBUS Out
  
• Receiver Inputs: 3
  
• LED Indicator Port: 1
  
• Stabilisation: ADV Advanced Stabiliser
  
• Telemetry: Altitude, Vertical Speed & System Telemetry
  
• Operating Voltage: 4–10V (Recommended 2S LiPo)
  
• Operating Current: ≤185mA @ 5V
  
• Continuous Current: ≤30A
  
• Operating Temperature: -20°C to 75°C
  
• Power Connector: XT30
  
• Dimensions: 53 × 40 × 16mm
  
• Weight: 26.7g

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