RC522 RFID Cards – 13.56MHz MIFARE Classic 1K Smart Card & Key Fob Tag Set

The RC522 RFID Cards are a set of 13.56MHz contactless smart cards and key fob tags designed to work seamlessly with the RC522 / MFRC522 RFID reader/writer module. Built on the MIFARE Classic 1K standard with ISO/IEC 14443 Type A compliance, these cards provide reliable, non-contact data storage and identification for access control, attendance systems, embedded projects, and IoT applications. Each card features a 1KB EEPROM memory, a 4-byte unique serial number (UID), and supports read/write operations with CRYPTO1 encryption for secure data handling.

Key Features

• 13.56MHz operating frequency
• ISO/IEC 14443 Type A compliant
• MIFARE Classic 1K chip with 1KB EEPROM memory
• 4-byte unique serial number (UID) per card
• Read/Write capable with CRYPTO1 encryption
• Contactless communication up to 60mm range
• High data retention of over 10 years
• 100,000+ erase/write cycles durability
• Includes standard white card and blue key fob tag
• Compatible with RC522, PN532, and other 13.56MHz readers

Technical Specifications

Applications

• Access control and security systems
• Employee and student attendance tracking
• RFID-based identification and verification
• Automatic billing and payment systems
• DIY electronics and Arduino/ESP32 projects
• IoT and smart home automation
• Inventory management and asset tracking
• Library book tracking and management

Important Notes

• These cards operate only at 13.56MHz — not compatible with 125kHz RFID systems.
• Compatible with MIFARE Classic 1K, Ultralight, S70, Pro, and DESFire protocols.
• Keep cards away from strong magnetic fields and metal surfaces for optimal read range.
• Do not bend, puncture, or expose cards to excessive heat or moisture.
• Store in a cool, dry place when not in use to preserve data integrity.
• Verify reader antenna tuning and positioning for maximum communication distance.