RadioMaster ER3C-i 2.4GHz ELRS PWM Receiver
RadioMaster ER3C-i 2.4GHz ELRS PWM Receiver - Image 2
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RadioMaster ER3C-i 2.4GHz ELRS PWM Receiver - Image 5
RadioMaster ER3C-i 2.4GHz ELRS PWM Receiver - Image 6
SKU: DRFC-3292
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RadioMaster ER3C-i 2.4GHz ELRS PWM Receiver

₹2,549.00 (Inclusive of all taxes)
Out of Stock

The RadioMaster ER3C-i is a compact 2.4GHz ExpressLRS PWM receiver designed for surface models and simple drone builds, providing 3-channel servo control with integrated voltage telemetry and a built-in ceramic antenna for a clean installation.

Features

  • 3-channel PWM output for direct servo and actuator control.
  • ExpressLRS 3.3.0 firmware pre-installed for ultra-low latency and long-range 2.4GHz operation.
  • Built-in high-sensitivity ceramic antenna eliminates external antenna wires.
  • Automatic battery voltage telemetry detection (4.0V to 35V DC range).
  • Compact PCB design measuring 26.1mm x 18.5mm and weighing only 4.2g.

Out of stock

Description

The RadioMaster ER3C-i receiver leverages the ExpressLRS protocol to deliver high-reliability control with flexible configuration via Wi-Fi and a web-based user interface. Its optimized PCB design integrates a TCXO (Temperature Compensated Crystal Oscillator) for stable frequency performance across varying environmental conditions.

Engineered for simplicity and reliability, the receiver automatically selects between external battery voltage or ESC BEC voltage for telemetry reporting, providing critical power system data directly to your transmitter. The absence of an external antenna simplifies installation in tight spaces common in surface models and compact drone builds.

Key Features

  • ExpressLRS 3.3.0 firmware delivers high-performance, low-latency control.
  • Integrated ceramic antenna provides robust signal reception without protrusions.
  • Automatic dual-source voltage telemetry (receiver BEC or main battery).
  • TCXO ensures consistent frequency stability under temperature fluctuations.
  • Wi-Fi update and WEBUI support for convenient firmware and parameter configuration.
  • Wide operating voltage range from 4.5V to 8.4V, compatible with 1S-2S LiPo BECs.
  • Compact and lightweight design minimizes impact on model weight and balance.

Applications

  • RC surface models including cars, trucks, and boats requiring 3-channel control.
  • Simple fixed-wing or VTOL drone builds utilizing PWM-based flight controllers.
  • DIY robotics and actuator projects needing reliable 2.4GHz radio control.
  • Backup or secondary receiver installations where space is extremely limited.
  • Companion receiver for RadioMaster, Jumper, or other ExpressLRS-compatible transmitters.

Technical Specifications

Item TypeELRS PWM Receiver
Main Control (MCU)ESP8285
Wireless ProtocolExpressLRS 2.4GHz
Firmware Version3.3.0 (Pre-installed)
Output Channels3CH PWM
Power Supply VoltageDC 4.5V - 8.4V
Telemetry Voltage DetectionDC 4.0V - 35V
Antenna TypeBuilt-in High-Sensitivity Ceramic Antenna
Length26.1 mm
Width18.5 mm
Weight4.2 g

Frequently Asked Questions

What is the operating voltage range for the ER3C-i receiver?

The receiver itself operates on a voltage range of 4.5V to 8.4V DC, typically supplied by an ESC's BEC or a separate regulator. Its telemetry circuit can automatically detect and report an external battery voltage from 4.0V up to 35V DC.

How many servos or channels can this receiver control?

The RadioMaster ER3C-i provides three (3) independent PWM output channels. This allows direct control of up to three servos, speed controllers, or other PWM-actuated devices without the need for an external decoder.

Does this receiver require an external antenna?

No, the ER3C-i features a built-in high-sensitivity ceramic antenna. This design eliminates the need for an external wire antenna, resulting in a cleaner and more robust installation, especially beneficial for surface models where antennas can be snagged.

How do I update the firmware or configure the ER3C-i?

The receiver supports Wi-Fi-based updates and configuration. By powering the receiver and connecting to its broadcasted Wi-Fi network, you can access a built-in WEBUI to adjust ExpressLRS parameters, update firmware, and bind the receiver to your transmitter module.

Package Includes

  • 1 x ER3C-i 2.4GHz ELRS PWM Receiver
  • 1 x Voltage Telemetry Wire
  • 1 x User Card

Additional Information

Weight 0.0042 kg
Dimensions 2.61 × 1.85 cm

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