AX5043 RF Transceiver Module EBYTE E31-433T33D 433MHz UART 2W 33dBm SMA-K Antenna 8km Long Range Wireless Industrial Module


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E31-433T33D is a 433M SMD wireless serial port module (UART) with AXSEM AX5243 RF chip imported from Switzerland, half duplex, transceiver integrated, transparent transmission mode, 425~450.5MHz frequency band (default 433MHz), TTL... Read more

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Categories: UART moduleTags: 2W, 33dBm, 433mhz, 8km, AX5043, SMA-K, UART

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E31-433T33D is a 433M SMD wireless serial port module (UART) with AXSEM AX5243 RF chip imported from Switzerland, half duplex, transceiver integrated, transparent transmission mode, 425~450.5MHz frequency band (default 433MHz), TTL level output with air wake-up function (ultra-low power consumption). The module has a FEC forward error correction algorithm, which has high coding efficiency and strong error correction capability. In the case of sudden interference, it can actively correct the interfered data packets, greatly improving reliability and transmission distance. In the absence of FEC, such packets can only be discarded. The module has data encryption and compression function.

The data transmitted by the module in the air is random, and the data interception is meaningless through strict encryption and decryption algorithms. The data compression function has the probability of reducing the transmission time, reducing the probability of interference, improving reliability and transmission efficiency. E31-433T33D strictly abides by FCC, CE, CCC and other domestic and foreign design specifications, meets all RF related certifications, and meets export requirements. E31-433T33D is an indispensable choice for your next wireless industrial module: its features offer unparalleled reliability, versatility, and power. Benefit from a far-reaching signal range, optimal data encryption, and a powerful forward error correction algorithm to make sure your data transmission is secure and efficient. With E31-433T33D, you're ready to take your project to the next level.

Features:The real testing distance reaches 8km; The max transmitting power is 2W, multi-level is adjustable via the software;  Support global license-free ISM 433MHz band; Support data transmission rate from 1.2kbps to 70kbps; Support low power mode, suitable for battery applications;  Supports 3.3V~5.2V power supply, and more than 3.3V power supply can guarantee the best performance;  Support advanced ultra-narrow band GFSK modulation. Industrial grade standard design, support for long-term use from -40 to 85 °C; SMA interface, easy connection of coaxial cable or external antenna.

Application:Home security alarm and remote keyless entry; smart home and industrial sensors;  wireless alarm security system; Building automation solutions; Wireless industrial grade remote control; Intelligent agriculture and oilfield solutions; health care products; Advanced Meter Reading Architecture (AMI); Automotive industry applications.

Brand Name:EBYTE
Origin:Mainland China
Type:Drive IC
Model Number:E31-433T33D
Working frequency:425~450.5 MHz
Transmitting power:33dBm
Test distance:8000m
Size:37 * 60 mm
Antenna type:SMA-K
Communication interface:UART
Power supply:3.3-5.2V
Type:AX5043 RF Transceiver Module


RF Parameter Value
Working frequency
425~450.5 MHz

Default:  433MHz

Transmitting power 24~33 dBm

Default:  33dBm(About 2W)

Receiving sensitivity
-126 dBm

Air data rate: 1.2kbps

Air data rate 1.2k~70kbps

Default: 1.2kbps

Test distance 8000m

In open and clear air, with maximum power, 5dBi antenna gain, height of 2m,

air data rate: 1.2kbps

Hardware Parameter Value


37 * 60 mm

Without SMA

Antenna type


Communication interface


Baud rate: 1200~115200, default: 9600




512  bytes buffer

Automatically sub-packaging with 43 bytes per package

Electronic parameter Min. Typ. Max. Unit Condition
Power supply
3.3 5.0 5.2 V
Communication level 2.5 3.3 3.6 V
Transmitting current
1240 1350 1490 mA 33dBm(2W)
Receiving current
17 18 mA

Sleep current
5 6 μA
Operating temperature
-40 20
Operating humidity
10 60
90 %
Storage temperature
-40 20


Company Profile
Development Testin

Lora Wireless Module

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AX5043 RF Transceiver Module EBYTE E31-433T33D 433MHz UART 2W 33dBm SMA-K Antenna 8km Long Range Wireless Industrial Module