{"title":"NTAG203 (13.56MHz RFID/NFC) Clear Keychain Fob","handle":"ntag203-13-56mhz-rfid-nfc-clear-keychain-fob","url":"/products/ntag203-13-56mhz-rfid-nfc-clear-keychain-fob","description":"A clear 13.56 MHz RFID/NFC keychain fob with an NTAG203 chip. Commonly used for transit passes, information sharing, and contactless identification, this tag contains a small RFID chip and antenna that is passively powered by a reader when placed a few centimetres away.\n\nThe NTAG203 is a \"Type 2\" NFC tag compatible with virtually any smartphone that supports NFC. Unlike Classic 1K (MiFare S50) cards, NTAG chips avoid NXP patent licensing issues, making them more universally compatible and more secure.\n\nKey Features\n\n\nNTAG203 Chip – NFC Forum Type 2 tag, compatible with all NFC-enabled smartphones\n\n144 Bytes Writable EEPROM – Stored in 4-byte banks with over 10,000 rewrite cycles\n\nUnique 7-Byte Serial Number – Permanent, non-changeable ID burned into the chip\n\n13.56 MHz / ISO 14443 Type A – Compatible with most 13.56 MHz RFID/NFC readers\n\nPassive Operation – No battery required; powered by the reader field\n\nClear Keychain Design – Durable fob that attaches to keys or lanyards\n\n\nSpecifications\n\n\nFrequency – 13.56 MHz\n\nProtocol – ISO/IEC 14443 Type A\n\nChip – NTAG203\n\nMemory – 144 bytes writable EEPROM\n\nRewrite Cycles – 10,000+\n\nUnique ID – 7-byte permanent serial number\n\n\nIdeal For\n\nNFC and RFID projects with Arduino or Raspberry Pi\nAccess control and identification systems\nInformation sharing and smart tags\nPrototyping contactless applications\n\n\n\nNote: Ensure your reader supports ISO/IEC 14443 Type A cards, as some readers use different encoding standards (e.g., FeliCa).\n\n\nPackage Contents\n\n1× NTAG203 Clear Keychain Fob (13.56 MHz RFID/NFC)\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":2122,"title":"Default Title","sku":"AF-5459","price":5.9,"on_sale":false,"in_stock":true,"available_quantity":100,"option1":"Default Title"}]}