CDEBYTE E73 2G4M04S1D Bluetooth Module Dual Antenna IPEX

The CDEBYTE E73-2G4M04S1D Bluetooth module is a micro-size, ultra-low power wireless solution built for reliable BLE connectivity in compact deployments. Based on the Nordic nRF51822, this module supports BLE 4.2 and combines a dual-antenna design with PCB and IPEX options for flexible antenna configurations. At just 17.5 × 28.7 mm and around 1.9 g, it fits neatly into space-constrained IoT, wearable, and sensor projects while delivering solid performance.

Designed for easy integration and long battery life, the E73-2G4M04S1D delivers dependable range and efficiency. With a transmit power of 4 dBm (about 2.5 mW) and a receive sensitivity of -96 dBm, it supports data rates of 250 kbps by default, with options for 1 Mbps and 2 Mbps. The module supports open-air test distances up to 110 meters under ideal conditions, making it suitable for wireless beacons, asset tracking, and remote sensors where distance matters. Its SMD package and dual-antenna capability provide versatile deployment without sacrificing size or power.

Key components include 256 KB of flash and 16 KB of RAM, powered by an ARM Cortex-M0 core. The system operates within a supply range of 2.1–3.6 V, with operating temperature from -40 to 85°C and humidity tolerance from 10% to 90% (non-condensing). The 2379–2496 MHz working frequency sits within the standard BLE 4.2 band, ensuring compatibility with a wide ecosystem of BLE peripherals and gateways.

Benefits & Tips

• Low power, long-life BLE solution: Ideal for battery-powered sensors and wearables thanks to efficient power consumption and sleep current as low as 0.5–2.5 μA.
• Flexible antenna options: Choose PCB antenna for a compact design or IPEX for easier external antenna routing and improved versatility in challenging environments.
• Easy integration and robust performance: Built on the proven nRF51822 platform with 256 KB flash and 16 KB RAM, offering ample room for firmware and BLE profiles while maintaining a small footprint.

Product Specifications

RF Parameter

• Working frequency: 2379–2496 MHz
• Transmitting power: 4 dBm (≈2.5 mW)
• Receiving sensitivity: −96 dBm
• Air data rate: 250 kbps; also supports 1 Mbps and 2 Mbps
• Test distance: up to 110 m (open air, maximum power, 5 dBi antenna)

Hardware Parameter

• IC: nRF51822-QFAA/QFN48
• FLASH: 256 KB
• RAM: 16 KB
• Core: ARM Cortex-M0
• Size: 17.5 × 28.7 mm
• Antenna type: PCB / IPEX
• Interface: I/O
Package: SMD

Electronic Parameter

• Power supply: 2.1–3.6 V
• Communication level: 2.1–3.6 V
• Transmitting current: 13–15 mA
• Receiving current: 11.3–13.8 mA
• Sleep current: 0.5–2.5 μA
• Operating temperature: −40 to 85 °C
• Operating humidity: 10–90%
• Storage temperature: −40 to 125 °C

Package Includes

• 1 x CDEBYTE E73-2G4M04S1D Bluetooth Module

Warnings / Reminders

• Power supply should be within 2.1–3.6 V to ensure reliable operation and prevent damage.
• Operate within the specified temperature range (-40 to 85 °C) and humidity tolerance (10%–90%; non-condensing).
• Refer to the user manual for integration guidance and BLE profile compatibility to maximize performance.

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