Product Overview

The MIFARE Classic 4K (S70) 13.56MHz Blank RFID Printable Card is a high-capacity contactless smart card designed for access control, identification, ticketing, and payment systems that require reliable read/write performance and moderate security. Built around the NXP MIFARE Classic 4K chip, this card provides 4096 bytes of user memory across 40 sectors, making it suitable for applications where multiple data blocks or multi-application deployment is needed. System integrators, security contractors, and distributors working on commercial or institutional projects choose this card when they need a stable, cost-effective HF RFID card that integrates seamlessly with existing 13.56 MHz readers and NFC-enabled terminals. The blank PVC body supports direct printing using dye-sublimation or thermal transfer printers, allowing organizations to customize card faces with logos, employee photos, or membership branding before issuing.

As a do rfid reader manufacturer, we supply this card in bulk to wholesalers, system integrators, and project contractors who require consistent production quality, fast lead times, and reliable chip performance across large deployments. The card is compatible with ISO/IEC 14443-A compliant readers including the ACR122U and similar HF reader modules, ensuring straightforward integration into existing access control infrastructure, time attendance systems, and cashless payment terminals.

Key Features

• NXP MIFARE Classic 4K Chip: 4096 bytes user memory organized into 40 sectors (32 sectors of 4 blocks and 8 sectors of 16 blocks) for flexible data storage across multiple applications.
• 13.56 MHz Operating Frequency: Standard HF band compatible with global access control, NFC, and transit reader infrastructure.
• ISO/IEC 14443-A Compliant: Ensures broad interoperability with commercial readers and NFC-enabled mobile devices.
• 4-Byte UID: Factory-programmed unique identifier for card-level authentication and tracking.
• CRYPTO1 Encryption: Hardware-based cryptographic protection for data transmission and sector access control.
• 106 kbps Data Transfer Rate: Fast read/write operations suitable for high-throughput environments like turnstiles and fare gates.
• 10 cm Read Range: Typical operating distance suitable for proximity card usage in access control and point-of-sale scenarios.
• Durable PVC Construction: Waterproof, flexible, and resistant to daily wear in commercial and industrial environments.
• Printable Surface: Compatible with Zebra, Epson, Canon, and other dye-sublimation or thermal transfer card printers for on-demand customization.
• Factory Default Keys: A/B keys set to FF FF FF FF FF FF for easy development and prototyping.

Technical Specifications

Industrial Applications

The MIFARE Classic 4K card is deployed across a wide range of commercial and institutional environments where moderate security, large memory capacity, and broad reader compatibility are required. Typical use cases include:

• Access Control Systems: Used by office buildings, hospitals, universities, and industrial facilities for employee and visitor badge-based entry. The 4K memory allows storage of multiple credential profiles or biometric templates on a single card.
• Public Transportation Ticketing: Suitable for bus, metro, and light rail fare collection systems that rely on ISO/IEC 14443-A compliant readers and require fast transaction speeds at turnstiles.
• Loyalty and Membership Programs: Deployed by retail chains, fitness clubs, and hospitality businesses for customer identification, point accumulation, and value storage across multiple locations.
• Cashless Payment: Used in cafeteria, vending, and event payment systems where stored-value or prepaid balance management is handled at the card level.
• Employee Identification Badges: Combined with photo ID printing for corporate ID cards that also function as door access and time attendance credentials.
• Hotel and Hospitality: Programmable key cards for guest room access, elevator control, and amenity authorization within hotel properties.
• Parking Access: Used in gated parking facilities for monthly subscriber identification and entry/exit logging.

OEM / ODM Manufacturing Support

As a do rfid reader manufacturer with dedicated RFID card production lines, we support OEM and ODM projects that require custom card dimensions, printed branding, pre-programmed sector data, or modified antenna designs. Buyers who need cards with custom artwork, company logos, or numbered serials can work with our engineering team to finalize print-ready artwork and sector mapping before production. For ODM projects, we can adjust card thickness, material composition, or chip placement to meet specific form factor requirements for specialized readers or embedded systems. All OEM orders undergo the same production process as our standard inventory, ensuring batch consistency and reliable chip performance across the entire run. Contact us at info@dorfidreader.com to discuss your custom card requirements and receive a project-specific quotation.

Factory Production Advantages

Our manufacturing facility is equipped for stable, high-volume card production with strict process control at every stage from PVC sheet cutting to chip embedding to final quality inspection. We maintain consistent bonding pressure and antenna tuning across production batches so that every card meets the stated read range and data transfer specifications. Each production lot is sample-tested for UID readability, sector write reliability, and physical dimension compliance before shipment. This production discipline matters to distributors and system integrators who cannot risk field failures during large-scale deployment. With export experience serving wholesale buyers across multiple regions, we understand the documentation, packaging, and delivery requirements associated with international B2B card supply. Our production capacity supports recurring orders for ongoing projects, giving long-term partners confidence in supply continuity.

Bulk Supply & Project Deployment Support

Wholesale buyers and project contractors benefit from tiered pricing structures that make bulk purchasing cost-efficient without sacrificing product consistency. Whether you need 600 cards for a single building access upgrade or 10,000 cards for a multi-site transit deployment, we can schedule production to match your delivery timeline. We support staggered shipments for phased rollouts and can hold finished inventory for scheduled release. For system integrators managing large-scale deployments, we can pre-program sector data or assign UID ranges to simplify field configuration. Project contractors who require compatibility validation with specific reader models can request sample quantities for testing before committing to full production. Our goal is to serve as a reliable supply partner who understands the procurement timelines and quality expectations of industrial RFID projects. Request a quote or contact us at info@dorfidreader.com for current pricing, lead time, and bulk order terms.

Frequently Asked Questions

What is the difference between MIFARE Classic 1K and MIFARE Classic 4K?
The 4K version provides 4096 bytes of user memory across 40 sectors, compared to 1024 bytes across 16 sectors on the 1K version. The 4K card is suitable when multiple data blocks or multi-application storage is needed on a single card.

Can this card be used with any 13.56 MHz reader?
This card is compliant with ISO/IEC 14443-A. It works with most commercial HF readers that support the MIFARE Classic protocol, including the ACR122U and similar reader modules. Always verify reader protocol compatibility before bulk deployment.

Is the card rewritable?
Yes. The MIFARE Classic 4K chip supports read/write operations. Data can be written and modified sector by sector using appropriate reader hardware and software tools, provided the correct access keys are used.

Can I print on this card with a standard ID card printer?
Yes. The card surface is compatible with dye-sublimation and thermal transfer printers from manufacturers such as Zebra, Epson, and Canon.

What are the factory default keys?
The default A and B keys are set to FF FF FF FF FF FF.

Do you offer pre-programmed cards for large projects?
Yes. For bulk orders, we can pre-program sector data or assign specific UID ranges based on your project requirements.

What is the minimum order quantity for wholesale pricing?
Wholesale pricing applies from 200 pieces upward. Contact us at info@dorfidreader.com for quantities beyond 1,000 pieces.