RadioMaster ER5C-i 2.4GHz ELRS 5CH PWM Receiver

The RadioMaster ER5C-i is an ultra-compact, 5-channel PWM receiver powered by the ELRS protocol. Designed for tight spaces and hassle-free installations, it features a built-in high-sensitivity ceramic antenna—eliminating the need to route or protect fragile external wires. Ideal for micro fixed-wing planes, small gliders, and surface models like cars and boats, it delivers the reliable range and fast response of ELRS in a tiny 3.0g footprint.

Key features

• ELRS Performance: Reliable 2.4GHz ELRS link with fast refresh rates and solid range.

• Built-In Ceramic Antenna: Snag-free internal antenna eliminates wire routing in confined fuselages or RC car chassis.

• Direct PWM Output: Drives up to five standard servos or ESCs straight from the receiver pins.

• Wide Voltage Input: Safely accepts 4.5V to 8.4V, making it compatible with high-voltage (HV) servos and standard BECs.

• Compact & lightweight: Weighs just 3.0g, perfect for micro builds and weight-sensitive aircraft.

Specifications

• Protocol: ELRS (2.4GHz)

• Output: 5x PWM channels

• Antenna: Integrated ceramic

• Telemetry Power: 10mW

• Input Voltage: 4.5–8.4V DC

• Dimensions: 30.0 x 15.5 x 5.5 mm

• Weight: 3.0g

To flash or update the ER5C-i, select the RadioMaster ER5C-i 2.4GHz PWM RX target in the ELRS Configurator. Ensure your radio is running a compatible 2.4GHz ELRS module before binding.