h1>Product Overview
The DO-T5577-125K Rewritable Blank RFID Printable Card is a durable, rewritable 125 kHz passive RFID card built around the industry-standard Atmel T5577 chip. Designed for system integrators, access control distributors, hotel solution providers, and industrial identification projects, this blank PVC card supports both read and write operations with 330 bits of total memory and 256 bits of rewritable user memory. Manufactured in ISO CR80 format (85.6mm x 54mm x 0.8mm), the card is compatible with EM4100 and EM4200 reader infrastructure, making it a drop-in replacement or upgrade path for existing 125 kHz deployments. As a blank rewritable card, it allows project managers and OEM customers to encode, personalise, and print on-demand without minimum batch restrictions, reducing inventory complexity and deployment lead time.
Procurement teams and wholesalers choose this card because it solves a common operational bottleneck: the need for a single, field-programmable credential that works across multiple access control, asset tracking, and identification systems. The DO-T5577-125K eliminates the requirement to stock multiple pre-encoded card variants, simplifying supply chain management and reducing waste. Whether deploying across 50 hotel rooms or 5,000 employee access points, the rewritable nature of the chip enables reuse, re-encoding, and reissuance without replacing the physical card. This directly lowers total cost of ownership for large-scale or long-term projects.
Product Advantages
- Field Rewritable Memory: 256 bits of user-rewritable memory allow on-site encoding, re-encoding, and updates without requiring new card stock. This is critical for temporary credentials, dynamic access zones, and multi-tenant facilities where access rights change frequently.
- Wide Reader Compatibility: The T5577 chip is compatible with the widely deployed EM4100 and EM4200 reader ecosystem, enabling integration with existing 125 kHz infrastructure from multiple reader manufacturers. This reduces requalification risk and deployment friction.
- Printable Blank Surface: The PVC surface accepts dye-sublimation and thermal transfer printing from common card printers (Zebra, Epson, Canon, and similar), allowing custom branding, expiry dates, barcodes, and photographic identification to be applied at the point of issuance.
- Password Protection & Anti-Collision: On-chip password protection prevents unauthorised overwriting of stored data, while anti-collision support allows multiple cards to be read in the same field without interference, which is essential for high-traffic entry points and inventory scanning.
- Industrial Durability: PVC construction provides water resistance, scratch resistance, and dimensional stability under normal indoor and sheltered outdoor conditions. The 0.8 mm ISO thickness ensures reliable feeding in card printers and compatibility with standard proximity readers.
Key Features
- Operating Frequency: 125 kHz (LF RFID)
- Chip Type: Atmel T5577
- Total Memory Capacity: 330 bits
- Rewritable User Memory: 256 bits
- Card Dimensions: 85.6 mm x 54 mm x 0.8 mm (ISO CR80 standard)
- Card Material: White PVC with printable surface
- Weight per card: 0.007 kg
- Supports both read and write operations
- Compatible with EM4100 and EM4200 reader protocols
- Password protection for write operations
- Anti-collision mechanism for multi-card reading
- Suitable for dye-sublimation and thermal transfer card printers (Zebra, Epson, Canon, and compatible models)
Technical Specifications
| Parameter | Value |
| Operating Frequency | 125 kHz |
| Chip Type | Atmel T5577 |
| Total Memory Capacity | 330 bits |
| Rewritable User Memory | 256 bits |
| Card Dimensions (ISO CR80) | 85.6 mm x 54 mm x 0.8 mm |
| Card Material | PVC (printable, waterproof) |
| Weight per Card | 0.007 kg |
| Read/Write Capability | Read and write |
| Reader Compatibility | EM4100, EM4200, and compatible 125 kHz systems |
| Write Protection | Password-protected |
| Anti-Collision | Supported |
| Printable Surface | Yes – compatible with dye-sublimation and thermal transfer printers |
| Packaging Options | 1, 10, 200, 600, 1000 pieces per package |
Industrial Applications
The DO-T5577-125K is deployed across a wide range of commercial and industrial identification and access control scenarios. System integrators and project contractors routinely select this card for the following use cases:
- Access Control Systems: Employee badges, visitor passes, and temporary credentials for office buildings, warehouses, factories, and gated communities. Rewritable memory allows easy reissuance when access levels change.
- Hotel and Hospitality: Guest room key cards that can be erased and re-encoded for new guests, reducing plastic waste and card replacement costs. The printable surface supports hotel branding and room number printing.
- Identification and Membership: Library cards, club membership cards, student ID cards, and corporate identification badges where the card carries a unique identifier that can be linked to a backend database.
- Parking and Toll Management: Long-term parking passes, season tickets, and fleet identification cards that must be read reliably at entry and exit barriers operating on 125 kHz technology.
- Asset Tracking and Inventory: Reusable asset tags for tool tracking, equipment check-in/check-out, and container identification in warehouse and logistics environments where the card is attached or carried with the asset.
- Gift Card and Loyalty Programs: Retail gift cards and loyalty cards that require a rewritable memory field for balance or points storage, combined with a printable surface for custom branding.
- Enterprise and Government: Secure identification badges for staff, contractors, and visitors in corporate campuses, government buildings, and industrial sites that require compatibility with legacy 125 kHz reader infrastructure.
OEM / ODM Manufacturing Support
As a factory-direct supplier, Do RFID Reader Manufacturer offers comprehensive OEM and ODM services for the DO-T5577-125K card. Procurement managers and brand owners can request custom card colours, pre-printed logos, variable data encoding, barcode printing, sequential numbering, and custom packaging. The production line supports both small-batch pilot runs and mass production for large-scale deployments, with batch consistency maintained through verified chip programming and visual inspection at multiple stages. OEM customers benefit from a dedicated technical contact who coordinates encoding specifications, artwork approval, and delivery scheduling, ensuring that the finished card matches the exact requirements of the end application.
Factory Production Advantages
Do RFID Reader Manufacturer operates a dedicated RFID card production facility with experience in high-volume PVC card manufacturing. The production process includes chip bonding, lamination, cutting, individual testing, and packaging. Each card is electrically tested to confirm read/write functionality and memory integrity before shipment. This in-house quality control capability means that wholesale buyers and distributors receive consistent product across multiple orders, with documented test results available for batch traceability. The factory maintains stable raw material supply agreements, ensuring that production lead times remain predictable even during peak demand periods. For project-based procurement, the factory can reserve production capacity to meet scheduled deployment dates, reducing the risk of supply delays affecting site commissioning timelines.
Bulk Supply & Project Deployment Support
Wholesale buyers, distributors, and system integrators benefit from tiered pricing based on order volume, with the most favourable unit pricing available at 1,000 pieces and above. The packaging options (1, 10, 200, 600, 1000 pieces) allow procurement teams to match inventory levels to project phases without overcommitting capital. For large-scale deployments exceeding 1,000 cards, the factory can provide customised packaging, mixed encoding profiles, and staged delivery schedules aligned with site rollout plans. Export logistics are handled through established freight partners, with standard shipping documentation provided for customs clearance. Project managers can request pre-production samples for reader compatibility testing and printer setup before committing to full volume production. This approach minimises technical risk and ensures that the deployed cards function correctly within the existing reader and printer ecosystem.
Frequently Asked Questions
Q: What readers are compatible with this card?
The DO-T5577-125K is compatible with any 125 kHz reader that supports the EM4100 or EM4200 protocol, which covers the majority of installed LF RFID access control and identification systems.
Q: Can I print on this card with my existing card printer?
Yes. The card has a PVC surface designed for dye-sublimation and thermal transfer printing. Printers from Zebra, Epson, Canon, and most other card printer brands are suitable.
Q: How many times can the memory be rewritten?
The Atmel T5577 chip supports tens of thousands of write cycles, making it suitable for applications where cards are reused frequently, such as hotel key cards and temporary credentials.
Q: What is the minimum order quantity for custom printing or encoding?
Custom printing and encoding are supported from 200 pieces upward. Smaller quantities are available as blank cards for self-encoding and printing. Contact the factory for specific requirements.
Q: Do you support drop-shipping for distributor orders?
Yes. The factory can arrange direct shipment to end-user sites under the distributor’s label, with commercial invoices and packing lists prepared accordingly. Coordinate with the sales team at the time of ordering.
Q: Is the card waterproof?
The PVC material is water-resistant and suitable for indoor and sheltered outdoor use. It is not designed for continuous immersion or extreme weather exposure. For harsh environments, consider an encapsulated or ruggedised form factor.
Q: What is the typical lead time for a bulk order of 1,000 cards?
Standard production lead time for blank cards is 5 to 10 working days after order confirmation, depending on factory loading. Custom printed or encoded cards may require additional time for artwork approval and setup. Contact the factory for current lead times.
Q: Can I request a sample before placing a bulk order?
Yes. Pre-production samples are available. Buyers can order a single piece or a small batch for reader compatibility testing and printer setup. Sample pricing applies, which is credited back on volume orders.
Q: How is the card delivered?
Cards are packed in sturdy cardboard boxes with internal dividers to prevent damage during transit. Each package is labelled with the quantity, product code, and batch number for traceability.
Q: Who do I contact for technical specifications and pricing for large projects?
For project-specific inquiries, bulk pricing, and OEM/ODM requirements, contact the Do RFID Reader Manufacturer sales team at info@dorfidreader.com. Include the target quantity, delivery timeline, and any customisation needs to receive a tailored quotation.