SMARTRAC Circus Ferrite OnMetal


Flexible Ferrite-based NFC Tags for Multiple Use


Smartrac’s NFC CIRCUS™ ON-METAL tags have been specifically designed to work on metallic objects. They open the door to all applications involving the tagging of metal surfaces that need to be identified or interacted with, such as metallic parts, tools, machines, spare parts and even domestic items.


In its CIRCUS ON-METAL tags, Smartrac combines flexible ferrite materials with a performance-optimized antenna design. The super-thin ferrite-based inlay is produced by applying a layer of ferrite material to the inlay, which isolates the magnetic field from the metal surface. Ferrite redirects the reader’s inductive field, and prevents energy from being wasted as heat within the metallic surface.


The flexible ferrite-based NFC inlays are suitable for roll-to-roll manufacturing processes, which make onward processing much easier and more cost-effective, and allow converters to overprint the inlays if required.


CIRCUS ON-METAL is equipped with the NXP NTAG213 IC. This chip offers (UID) mirror functionality that enables the IC’s serial number to be mirrored as part of its encoded data, and identifies unique reads from the application perspective. The product is less than half a millimeter thicker including the added ferrite layer.


Smartrac’s inlays and tags are compliant with ISO 9001:2008 Quality Management and ISO 14001:2004 Environmental Management. This ensures a reliable and state-of-the-art product that meets a variety of application needs, where high performance is a critical parameter.


Operating Frequency

13.56 MHz

Integrated Circuit (IC)


Antenna Size

Ø 20 mm (0.79 in)


Die-cut Size

Ø 22 mm (0.87 in)

Quality Assurance

100% performance tested

Fields of Applications

  • Asset Management
  • Brand protection
  • Customer experiences
  • Industry
  • Product authentication
  • Retail
  • ... and many more.

International Standards

  • ISO 14443 A
  • NFC Forum