Product Overview

The MIFARE Classic 4K (S70) 13.56MHz Blank RFID Printable Card from DO RFID Reader is a high-capacity PVC contactless smart card designed for commercial and industrial access control, payment systems, identification, and asset tracking deployment. Built around the NXP MIFARE Classic 4K chip, this card provides 4096 bytes of user memory across 40 sectors, making it a practical choice for system integrators, project contractors, and distributors who require stable read performance, CRYPTO1 data protection, and compatibility with existing ISO/IEC 14443-A infrastructure.

Purchased by security system integrators, transportation system operators, campus ID program managers, and loyalty program developers, this card solves the business problem of managing multiple secure applications on a single credential. Instead of deploying separate cards for access, transit, and stored value, project teams can use the 4K memory to segment data per application while maintaining one card per user. DO RFID Reader supplies this card as a standard blank printable product, ready for custom printing, encoding, and large-scale project integration.

Product Advantages

• Expanded memory for multi-application deployment: 4096 bytes of user memory divided into 40 sectors allows system integrators to partition data for access control, cashless payment, time and attendance, and identification on a single card. This reduces card issuance costs and simplifies credential management for large facilities or campus environments.
• Reliable 13.56MHz HF communication: Operating at 13.56 MHz with a read range up to 10 cm, this card works with standard ISO/IEC 14443-A readers already installed in commercial buildings, transit gates, and parking systems. No reader retrofit is needed, lowering project deployment complexity.
• Blank printable surface for on-demand customization: The PVC surface accepts dye-sublimation and thermal transfer printing from equipment such as Zebra, Epson, and Canon card printers. Distributors and OEM customers can print logos, photos, barcodes, and employee details in-house, eliminating the need for pre-printed inventory.
• CRYPTO1 encryption for secure data transmission: The MIFARE Classic 4K chip uses CRYPTO1 encryption to protect communication between the card and reader. This prevents unauthorized data interception during access control and payment transactions, meeting the security requirements of commercial building management and transit fare collection.
• Durable waterproof PVC construction: The ISO standard CR80 size card (85.6 mm x 54 mm x 0.8 mm) is made from solid PVC, resistant to bending, moisture, and daily wear in high-traffic environments such as office turnstiles, hotel keycard holders, and event access points.

Key Features

• Operating Frequency: 13.56 MHz
• Chip Type: NXP MIFARE Classic 4K (S70)
• User Memory: 4096 Bytes (40 sectors: 32 sectors of 4 blocks and 8 sectors of 16 blocks)
• UID Size: 4 Bytes
• Read Range: Up to 10 cm (dependent on reader antenna geometry and environment)
• Data Transfer Rate: Up to 106 kbps
• Communication Protocol: ISO/IEC 14443-A
• Dimensions: 85.6 mm x 54 mm x 0.8 mm (ISO CR80 standard)
• Material: PVC
• Factory Default A/B Key: FF FF FF FF FF FF
• Encryption: CRYPTO1
• Compatible Readers: ACR122U and other standard ISO/IEC 14443-A NFC-enabled readers
• Printing Compatibility: Dye-sublimation and thermal transfer printers (Zebra, Epson, Canon)

Technical Specifications

Industrial Applications

Access control for commercial facilities: Property management firms and security contractors use this card as the primary credential for employee and visitor access to office buildings, warehouses, and restricted zones. The 4K memory allows separate storage of access permissions and biometric templates on the same card.

Public transportation and transit ticketing: Transit authorities and fare collection system integrators deploy this card for stored-value ticketing and monthly pass programs. The multiple-sector architecture supports fare deduction, validation logging, and rider identification within a single card lifecycle.

Loyalty and prepaid payment programs: Retail chains, fuel station networks, and hospitality groups issue this card for customer loyalty tracking and gift card programs. The blank printable surface enables brand-specific artwork, while the MIFARE chip handles point accumulation and redemption transactions at point-of-sale terminals.

Campus identification and student management: Universities and large school districts use this card for student ID, library access, cafeteria payment, and dormitory entry. One card replaces multiple legacy systems, reducing administrative overhead and improving student convenience.

Employee identification and time tracking: Manufacturing plants and logistics centers issue this card for employee badges integrated with time and attendance readers. The CRYPTO1 encryption prevents clock-in fraud, and the durable PVC withstands daily exposure in industrial environments.

OEM / ODM Manufacturing Support

DO RFID Reader offers comprehensive OEM and ODM customization for this MIFARE Classic 4K card, enabling distributors, system integrators, and project contractors to bring their own branded credential to market without investing in production infrastructure. Customization options include pre-printed artwork, logos, serial numbering, barcode or QR code printing, and custom chip encoding with specific sector keys or data structures defined by the client. For OEM partners requiring consistent batch quality across multi-year contracts, DO RFID Reader maintains stable production capacity and uniform card material sourcing, ensuring that each production run matches the previous batch in color, thickness, and print registration. This batch consistency is essential for organizations that issue cards over multiple phases and need all credentials to look and function identically. ODM clients can also request custom packaging, including bulk packing, individual sleeves, or branded retail-ready boxes, depending on their channel requirements.

Factory Production Advantages

As a dedicated do rfid reader manufacturer, DO RFID Reader operates a streamlined production process for blank and customized PVC cards, with proven export experience serving wholesale buyers and project integrators across multiple regions. The factory maintains stable raw material supply agreements for PVC and NXP chips, reducing the risk of production delays during peak project periods. Each card undergoes visual inspection and functional read-write testing before packaging, with sample-based sector integrity verification to confirm that all 40 memory sectors are accessible. For wholesalers who place recurring bulk orders, the factory offers structured lead times and volume-based pricing that supports predictable project planning. Production capacity is scaled to handle both small-batch OEM pilot runs and large-scale deployments of 100,000+ cards per month, giving buyers the flexibility to start with trial quantities and transition to full production as their project requirements grow. DO RFID Reader also provides technical support for card encoding workflow setup, helping system integrators configure their reader infrastructure for seamless compatibility with the MIFARE Classic 4K memory structure.

Bulk Supply & Project Deployment Support

For distributors and project-based buyers, DO RFID Reader structures bulk orders with tiered pricing starting at 200 pieces and scaling up to 1000 pieces and above, making it practical for organizations to buy at wholesale rates while matching their deployment schedule. Cards ship as blank units ready for on-site printing and encoding, which eliminates the need for pre-personalized inventory management. For large-scale projects such as university campus card programs, corporate headquarters access rollouts, or citywide transit card launches, the factory can reserve production slots to ensure fast lead times during peak installation windows. System integrators benefit from having a single supply partner for both cards and compatible readers, reducing procurement complexity and ensuring that card-reader communication is validated before shipment. DO RFID Reader supports project-stage purchasing, meaning buyers can order an initial batch for pilot testing and follow up with larger quantities for full deployment without changing product specifications or supplier workflows.

Frequently Asked Questions

What readers are compatible with this MIFARE Classic 4K card?
This card uses the ISO/IEC 14443-A communication protocol and works with standard 13.56 MHz HF readers such as ACR122U, as well as most NFC-enabled mobile devices and commercial access control panels that support MIFARE Classic technology.

Can I encode custom data sectors before delivery?
Yes. DO RFID Reader supports factory-level encoding of user data sectors, including custom key structure A/B keys per sector, write-protected data blocks, and pre-loaded application data for access control or payment systems. Contact the sales team with your encoding specification.

What printing methods work on this card surface?
The PVC surface accepts dye-sublimation and thermal transfer printing using standard card printers from Zebra, Epson, Canon, and similar manufacturers. The blank surface provides a clean white printable area suitable for full-color graphics, text, barcodes, and photographs.

How many cards can I order for a pilot project?
Single-unit samples are available for initial testing. For pilot deployments, 10-piece to 200-piece quantities are recommended. Once validation is complete, bulk pricing applies from 600 pieces upward, with the lowest per-unit cost starting at 1000 pieces.

Is this card suitable for outdoor or high-humidity environments?
The PVC construction provides resistance to moisture and typical environmental exposure inside buildings, turnstile enclosures, and kiosk readers. For continuous outdoor or extreme temperature applications, please consult DO RFID Reader for alternative material options.

What is the typical lead time for bulk orders?
Lead time depends on quantity and customization requirements. Standard blank card orders typically ship within 3-7 business days. Custom-printed or encoded orders may require 10-15 business days depending on artwork approval and encoding complexity. Contact DO RFID Reader for current lead time estimates based on your order volume.

Do you support custom key structure for secure access projects?
Yes. The factory default key is FF FF FF FF FF FF on both A and B sectors. For production projects requiring unique keys, DO RFID Reader can pre-configure custom sector keys per your access control policy before shipment, ensuring that blank cards arrive ready for immediate deployment in your secure environment.

Request a Quote for Bulk or Project Orders

For OEM customization, wholesale pricing, project partnership, or large-scale deployment support, contact DO RFID Reader at info@dorfidreader.com. Include your target quantity, delivery timeline, and any custom encoding or printing requirements for a tailored quotation.