RadioMaster ER5A V2 2.4GHz ELRS PWM Receiver

The RadioMaster ER5A V2 is a compact 2.4GHz ExpressLRS receiver with five PWM outputs, designed for fixed-wing aircraft, surface vehicles and traditional RC models that do not require digital SBUS or CRSF protocols. The V2 revision adds improved RF performance and lower latency compared to the original ER5A, making it a practical choice for long-range planes and rovers running standard servo and PWM ESC setups.

Key features

• Five independent PWM channels for direct servo and brushed ESC control without a flight controller

• 2.4GHz ExpressLRS protocol with support for 100Hz, 250Hz and 500Hz packet rates for responsive control at extended range

• Integrated ceramic antenna and U.FL connector for external antenna mounting when needed

• Low power consumption under 150mA at 5V, suitable for small receiver packs and BEC-powered setups

Specifications

• Protocol: ExpressLRS 2.4GHz

• Channels: 5× PWM output

• Input voltage: 4–6V (5V typical)

• Antenna: Integrated ceramic + U.FL connector

• Dimensions: 16×11mm

• Weight: 0.8g (without antenna)

The ER5A V2 binds to any ELRS 2.4GHz transmitter and works with traditional RC planes, crawlers and boats where PWM output is required. Not compatible with Betaflight or other digital flight-controller ecosystems—use an ER-series receiver with CRSF output for quadcopters.