RFID Read/Write 54 x 85 mm Rectangle Tag (Use Writer 2123514)

$4.95 ea

  • Part no.: 2123522
  • Manufacturer: Parallax
  • Manufacturer no.: 28441
  • RoHS Compliant
# of units Price
1+ $4.95
10+ $3.95
100+ $3.25

RFID Read/Write 54 x 85 mm Rectangle Tag

This RFID Read/Write transponder tag is part of the EM Microelectronic-Marin SA EM4x50 family and is designed to work with our RFID Read/Write Module, Serial (#28440). Each tag contains a unique, read-only serial number (one of 2^32, or 4,294,967,296 possible combinations) and 116 bytes of user data area stored in a non-volatile EEPROM (Electrically Erasable Read Only Memory). The user data area can be optionally secured with a 32-bit password to allow only authorized read and write operations.


  • Thin package makes it ideal for access badge applications
  • Both sides are fully printable with offset, thermo-transfer and dye sublimation printing
  • Designed to resist common stress known from access control and time attendance systems
  • EM Microelectronic-Marin SA EM4x50 family chip
  • 125 kHz operating frequency
  • Dimensions: 2.125 x 3.365 in. (5.4 x 8.55 cm)

    Application Ideas

  • Room access
  • User authentication
  • User data storage


  • These tags are not compatible with the RFID Card Reader (USB or Serial).
  • Not recommended for use in direct sunlight. Use RFID R/W Round Tags (#32399) instead, as they are made with a more rugged outer casing.
  • In accordance with U.S. Patent Nos. RE40,145; 5,817,207; 6,036,099; 6,214,155; 6,514,367; and 6,557,766.

    Downloads & Resources

  • RFID Read/Write Module Documentation
  • RFID Read/Write Module BASIC Stamp Demo Code

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