📌 What MIFARE 4K 13.56 MHz Blank Cards Are
MIFARE 4K cards are high-frequency (HF) contactless smart cards that operate at 13.56 MHz and follow the ISO/IEC 14443-A standard. They contain 4 KB of rewritable memory, significantly more than the popular 1K variants, making them suitable for multi-application systems (e.g., access control + transit + campus ID + loyalty programs).
Common MIFARE 4K chip types include:
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MIFARE Classic 4K (S70) — widely supported legacy type.
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MIFARE Classic EV1 4K — updated version with improved features.
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MIFARE Plus 4K — enhanced security with AES encryption capabilities.
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MIFARE DESFire EV1/EV2 4K — modern secure chip supporting many applications and high-security use cases.
These are sold as blank white PVC cards (standard ISO CR80 size, ~85.6 × 54 mm) that you can custom print and encode yourself.
🧠 Key Technical Specs
| Feature | Typical Value |
|---|---|
| Frequency | 13.56 MHz (HF) |
| Protocol | ISO/IEC 14443-A |
| Memory | ~4 KB EEPROM (read/write) |
| Card Size | CR80 – ~85.6×54 mm |
| Material | PVC (blank, printable) |
| Surface | Gloss/matte white, suitable for printing |
| Read Range | ~2–10 cm depending on reader & environment |
These cards are passive RF cards (no battery) that work when brought near a compatible 13.56 MHz reader.
🧩 Variants Explained
🔹 MIFARE Classic 4K
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4 KB memory arranged in sectors & blocks.
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Compatible with many existing MIFARE infrastructures.
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Good for mid-level security use, campus IDs, multi-application cards.
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Widely available as blank white cards.
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