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 5g 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 and lightweight: weighs just 5.0g, small enough 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 18.5 x 13.0 mm
• Weight: 5.0g

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.