125KHz EM4100 RDM6300 RFID Reader

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Product Overview

Now available from Tronixlabs is this classic RFID reader, as used in many Arduino projects. The RDM 125KHz card mini-module is designed for reading code from 125KHz card compatible read-only tags and read/write cards.

It can be applied in office/home security, personal identification, access control, anti-forgery, interactive toy and production control systems etc.


  • Supports external antenna
  • 5V operating voltage and I/O
  • Maximum effective distance up to 50mm
  • Less than 100ms decoding time
  • UART TTL interface
  • Support EM4100 compatible read only or read/write tags
  • Built-in external bi-color LED and buzzer driver
  • Small outline design
  • includes external antenna
  • Note: Module will notify whenever 125khz tag approaches, tag serial number will be sent via TX pin.


  • Frequency: 125kHZ
  • Baud rate: 9600
  • Interface: TTL level RS232 format
  • Working voltage: DC 5V(+/-5%)
  • Working current: <50mA
  • Receive distance: 20~50mm
  • Working temperature: -10°C~+70°C
  • Storage temperature: -20°C~+80°C
  • Humidity: 0~95%
  • Wiring size: 46 x 32 x 3mm

More information:

This is a brand-new, old-stock item that has been in storage. Full warranty and technical support. Click here to learn more. 


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