EM4305 125kHz Writable RFID Card
Rewritable LF RFID Cards for Access Control, Membership & ID Systems
✅ The Solution: EM4305 Rewritable RFID Card
The EM4305 125kHz RFID card integrates a rewritable EEPROM chip that supports data overwrite and UID programming (with compatible LF writers). Unlike traditional read-only LF cards, EM4305 enables:
- Card reuse without reissuing physical cards
- Flexible user provisioning and revocation
- Cost-efficient lifecycle management for large deployments
This makes EM4305 an ideal choice for access control, time & attendance, parking, and membership systems.
📊 Performance & Reliability
Key Technical Highlights
- Operating Frequency: 125kHz (LF RFID)
- Chip Type: EM4305
- Memory: 512-bit EEPROM
- UID: 32-bit programmable UID
- Read / Write: Fully rewritable with supported LF RFID writers
- Read Distance: Up to ~10 cm (reader dependent)
- Write Endurance: ≥100,000 cycles
- Data Retention: ~10 years
Card Construction
- Form Factor: CR80 (85.5 × 54 × 0.88 mm) or custom sizes
- Material: High-quality PVC (printable)
- Surface Options: Glossy / Matte
- Printing: Silk-screen, CMYK, Pantone, laser engraving
🎯 Business Value & Use Cases
Why Choose EM4305 RFID Cards?
- Lower Total Cost of Ownership
Rewritable cards reduce replacement frequency and inventory waste. - System Compatibility
Works with most 125kHz LF proximity readers and access control systems. - Operational Flexibility
Ideal for environments requiring frequent card re-issuance or temporary access. - Custom Branding Ready
Supports logo printing, serial numbers, barcodes, and QR codes.
Typical Applications
- Access control systems (office, residential, campus)
- Parking and vehicle entry management
- Membership & loyalty cards
- Attendance and staff identification
- Event passes and temporary credentials
- Asset and equipment identification
📋 Technical Specifications
| Parameter | Specification |
|---|---|
| RFID Standard | ISO 11784 / 11785 Standard Compliant |
| Frequency | 125kHz |
| Chip | EM4305 |
| Memory | 512-bit EEPROM |
| UID | 32-bit |
| Read Distance | Up to ~4cm |
| Write Cycles | ≥100,000 |
| Data Retention | ~10 years |
| Material | PVC |
| Size | CR80 (85.5 × 54 mm) |
| Operating Temp | -25°C to +65°C |
🌍 Compliance & Quality
- Standards: ISO Size
- Environmental: RoHS, REACH compliant
- Manufacturing: ISO 9001 quality management
- Use Case Validation: Widely deployed in access control, parking, and membership systems worldwide
❓ Frequently Asked Questions (FAQ)
Q1: Can EM4305 RFID cards be rewritten multiple times?
Yes. The EM4305 chip supports rewriting up to 100,000 cycles when used with compatible 125kHz RFID writers.
Q2: Are these cards compatible with standard 125kHz readers?
Yes. They are compatible with most LF 125kHz proximity readers. Writing requires a writer that explicitly supports EM4305.
Q3: Can the card surface be customized?
Yes. Cards can be printed with logos, serial numbers, barcodes, QR codes, and custom designs using CMYK, Pantone, or laser engraving.
Q4: What is the lifespan of stored data?
Stored data typically retains integrity for up to 10 years under normal operating conditions.
Q5: Is this card suitable for high-volume projects?
Absolutely. EM4305 cards are designed for mass deployment, offering stable performance and low lifecycle cost.
🧾 Conclusion
The EM4305 125kHz Writable RFID Card is a practical and cost-effective upgrade for legacy LF RFID systems. By enabling rewrite capability and card reuse, it helps organizations reduce operating costs while maintaining compatibility with existing infrastructure.
📩 Contact us today for samples, bulk pricing, customization options, and technical integration support.
