On-metal Round NFC Tags NTAG424 DNA ø29mm

1.19 €
As low as 0.77€/pz. for 1000 pieces . Learn more

Reference SC-N424-29

Round, white, anti-metal NFC tags with NTAG424 DNA chip, for application on metal surfaces. Support AES-128 encryption and SUN message.

Custom Printing
  • No
  • Black print | 1-2 days
  • Offset CMYK print | 6-8 weeks


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Volume discounts

Quantity Discount Unit Price
50 10% 1.07 €
100 21.05% 0.94 €
500 29.82% 0.84 €
1000 35.08% 0.77 €

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White label, round, with a diameter of 29 mm, equipped with NXP NTAG424 DNA chip

The NTAG 424 DNA chip sets a new standard in NFC and secure IoT applications. The new chip generation offers state-of-the-art security and privacy protection features. For this purpose, the chip is made with attack-resistant certified silicon.

The NTAG 424 DNA chip is designed to support operations protected by AES-128 encryption, including a new SUN (Secure Unique NFC message) authentication mechanism, as well as the protection of sensitive data with encrypted access permissions. These features allow advanced product and content protection, as well as secure and unique user experiences in real time.

What is the SUN message

The Secure Unique NFC function generates a unique and secure authentication code whenever the Tag is read. With the SUN function, an NDEF message (readable by any NFC smarpthones) is generated, using an encryption algorithm that includes: URL, UID, counter scan, and AES key.

SUN message - NTAG DNA

Being also connected to the scan counter, each time the Tag is read, it generates a different string. In this way, the content is protected from cloning.

It is interesting to note that this increase in security is at the same time a simplification of the approach to the end user, which does not need to download any specific application to verify the authenticity of the Tag (and the content linked to it).

How to encode an NTAG 424 DNA

To enable the SUN message, we recommend using the Identiv uTrust 3700 F and TagXplorer software, developed by NXP.

Technical features

  • Available memory: 256 bytes (for NDEF message)
  • Adhesive dimensions: 29 mm (diameter)
  • Operating temperature of the chip: -25°C ÷ 70°C
  • Storage temperature: -55°C ÷ 125°C
  • Operating frequency: 13.56 MHz


  • Anti-counterfeiting
  • Secure login
  • Token generation
  • Product authenticity
  • Applications that handle sensitive data

For an animated illustration of how the encryption algorithm that generates the SUN message works, click here

Custom printing

NFC Tags are white.

Black printing (1-2 days) is done with the thermal transfer technique. It is a low quality print, but very resistant and economical. It is normally used for serials, barcodes or QR codes. However, simple logos can also be printed.

Offset printing (5-8 weeks) is carried out with the Offset technique, during the label production process. It offers the best print quality ever. The file for printing must be in CMYK, possibly vector.


Data sheet

NFC Chip
NFC Standard
ISO/IEC 14443-A
NFC Forum
Type 4
Universal Compatibility
UID (Unique ID)
7 bytes
Available memory
256 bytes
Communication rate
848 kbit/s
Read/Write endurance
200,000 cycles
Data retention
50 years
Works on metal
Waterproof level
Rain and spray
Protection class
Commodity code (HS)



NXP NTAG 424 DNA chip data sheet. Information on: memory structure, AES-128 encryption and SUN function.

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