FrSky Dual Power Switch & BEC 25A (5–8.4V) – Dual Battery Redundancy System

FrSky Dual Power Switch & BEC – 25A High Performance Power System

The FrSky Dual Power Switch & BEC is a professional-grade power management system designed for large RC airplanes and high-demand electronics setups. With dual battery redundancy, configurable voltage output, and up to 25A continuous current, this system ensures reliable and stable power delivery for your receiver and servos.

Advanced Power Switching System

The built-in power switch function supports multiple external switching options, allowing you to safely power your model on and off without disconnecting batteries. Compatible switch types include NFC switches, pin plug switches, and other external switch systems, giving you flexible installation options for different aircraft setups.

Key Features

• Dual battery inputs for redundancy and fail-safe operation
• Dual BEC outputs for balanced power distribution
• Built-in power switch function with external switch compatibility (NFC, pin plug, etc.)
• 25A continuous current capability for high servo loads
• Configurable output voltage: 5.0V / 6.0V / 7.4V / 8.4V
• CNC aluminum housing with finned heat dissipation design
• Designed for continuous operation under high current demand
• LED status indicators for real-time system monitoring
• Compatible with FrSky FBUS and S.Port telemetry systems
• Secure XT30 connectors for all inputs and outputs

Specifications

• Dimensions: 70 × 34 × 18.5 mm
• Weight: 63g
• Input Voltage: 7.4V – 26V (3S–6S LiPo recommended)
• Output Voltage: 5.0V / 6.0V / 7.4V / 8.4V (adjustable)
• Continuous Current: Up to 25A
• Operating Temperature: -20°C to 75°C
• Connectors: XT30 (Dual Battery Input & Dual BEC Output)

Note: 2S batteries do not provide sufficient voltage to achieve the 8.4V output setting.

How It Works

• Balance Mode: Automatically draws power from the higher voltage battery
• Backup Mode: Uses a primary battery and switches to backup when voltage drops

This dual-input system ensures continuous, uninterrupted power delivery even if one battery fails or drops below safe levels.

What’s Included

• FrSky Dual Power Switch & BEC unit
• Pre-installed XT30 connectors
• Integrated CNC aluminum heat sink housing

What You’ll Need to Complete

• 2x LiPo batteries (3S–6S recommended)
• Receiver and servo system
• Optional FrSky transmitter for Lua configuration

Best Use Applications

• Giant scale gas airplanes (30cc–100cc+)
• Warbirds with retracts and high servo count
• Jets and complex builds with high current demand
• Any model requiring redundant power systems

Why Dual Power Systems Matter

In large RC aircraft, a single battery or switch failure can result in complete loss of control. A dual battery power system provides redundancy, ensuring continuous power to your receiver and servos even if one battery fails or drops voltage. This system is strongly recommended for models with high servo counts, retracts, or gas engines.

Modeler’s Tip

For large gas models with 8+ servos, use dual 2S LiFe or 3S LiPo packs to fully utilize the redundancy system and maintain consistent voltage under load.