Why NXP MIFARE Classic Cards Remain Industry Favorites​

Since 1995, NXP' s MIFARE Classic series has set the standard for contactless smart cards, with S50 (1K) and S70 (4K) models dominating global markets. These cards combine reliability, security, and flexibility—making them ideal for diverse applications from public transit to access control. As one of the leading companies in smart cards, let Zhanfeng Smart Card break down their key advantages:

Core Advantages of MIFARE S50 (1K) & S70 (4K)

Memory & Flexibility

S50 (1K): 1KB EEPROM (768 bytes usable) divided into 16 secure sectors, each with 4 blocks. This form of data is very suitable for single-application use cases like employee badges or event tickets, where storage needs are modest but security is critical. This will greatly enhance the convenience of management.

S70 (4K): 4KB EEPROM (3,480 bytes usable) with 40 sectors (32 standard + 8 extended) . Unlike the previous type of card, this card is designed for multi-application scenarios such as campus "all-in-one" cards that handle access, payments, and library checkouts simultaneously.

Speed & Usability

Both models operate at 13.56MHz (ISO/IEC 14443 Type A) with transaction times under 100ms. Their anti-collision technology lets multiple cards interact with a reader without interference—ideal for high-traffic areas like subway gates or stadium entrances. Users can even keep cards in wallets during transactions. This will significantly reduce the time users spend and enhance the customer experience.

Security & Durability

Each sector features two 48-bit keys for hierarchical access control, supported by mutual three-pass authentication. Up to 100,000 write cycles and 10-year data retention , these cards deliver long-term reliability for critical systems.

Choose Zhanfeng Smart Card: Your Trusted Source Manufacturer

With 20 years experience in the smart card industry, Zhanfeng stands out as a leading source manufacturer (source manufacturer) with global reach. Here' s why we' re your best partner:

Authentic NXP Chips: We use 100% genuine NXP MIFARE ICs, ensuring compatibility with all standard readers and compliance with ISO standards. 

Customization Expertise: From CMYK offset printing to QR code engraving, we tailor cards to your brand—whether for PVC access cards or durable outdoor tags. In addition, if customers have other process requirements for their products, such as printing QR codes or inkjet coding, we can also provide customized services according to their requirements.

Risk-Free Sampling: If you are interested in our products but are concerned about the purchasing risks, we will offer free foster care services. Test our S50/S70 cards firsthand with free samples—we ship globally to verify performance before your order.

If you need MIFARE Classic 1K 4K S50 S70 Cards for your systems, Zhanfeng delivers cost-effective solutions without compromising on quality. Our ISO9001-certified production lines guarantee consistent quality, trusted by clients in transportation, hospitality, and corporate sectors worldwide. Contact us today to request your free sample and discuss customizations. Let' s build smart, secure cards that drive your business forward.