September 14, 2026
This low-frequency (LF) passive clamshell RFID card EM 4450 is waterproof and wallet-sized. It provides a tested read range up to 130 cm (50 in.) and has a slot to attach a lanyard. Its tested read range is up to 130 cm (50 in.). The RFID card offers true anti-collision properties for multiple tag detection. It is commonly utilized in ticketing, high-security hands-free, industrial or manufacturing automation, and prepayment devices.
The 125kHz EM4450 RFID Card is a passive rewritable contactless card designed for applications that require reliable identification, data storage, and flexible RFID management. Built with the EM4450 RFID chip, this low-frequency RFID card provides EEPROM memory, read and write capability, and configurable security features.
Unlike traditional 125kHz read-only RFID cards, the EM4450 card allows users to store and update data repeatedly, making it suitable for access control, employee identification, membership systems, industrial tracking, and customized RFID solutions.
Manufactured with durable PVC or PET materials, the EM4450 RFID card is available in standard card sizes and can be customized with printing, numbering, encoding, and different surface finishes according to project requirements.
What Is an EM4450 RFID Card?
An EM4450 RFID card is a 125kHz passive RFID smart card equipped with an EM4450 integrated circuit. It communicates with RFID readers through electromagnetic induction and does not require an internal battery.
The card receives energy from the RFID reader field, activates the chip, and exchanges stored information wirelessly.
Compared with basic RFID cards that only transmit a fixed ID number, the EM4450 provides additional memory functions, allowing data to be written, updated, and protected.
Key characteristics include:
- 125kHz low-frequency RFID technology
- Passive operation without batteries
- Rewritable EEPROM memory
- Contactless data communication
- Long service life
- Compatible with dedicated EM4450 RFID readers
Plastic 125khz passive Rewritable RFID EM4450 Contactless card
| Type | RFID EM4450 Contactless card |
| Operating frequency | 125 ± 6 kHz |
| Capacity | 64 bits |
| Data coding type | Manchester |
| Tested read range | Up to 130cm (50in.) depending on RFID reader and data coding type |
| Multi-detection | Yes |
| Read quantity (max.) | Determined by mode tags/sec |
| Material | ABS , PVC or PET |
| Color | White – can be silk screened or offset printed on PVC side |
| Compliance | IC EM4450 |
| Operating specifications | Waterproof |
| Resisting to immersion in salt water, alcohol, oil, 10% HCL, ammonia and avoiding shock and vibration | |
| Storage temperature | -55 °C to 100 °C |
| Operating temperature | -40 °C to 85 °C |
| Dimension | 85.6 mm × 53.98 mm × 1.8 mm |
| Weight | 9 g ± 0.5 g |
The EM4450 is a CMOS integrated circuit intended for use in electronic Read/Write RF Transponders. The chip contains 1 Kbits of EEPROM which can be configured by the user, allowing a write inhibited area, a read protected area, and a read area output continuously at power on.
EM4450 RFID Card Main Features
The EM4450 RFID card combines simple RFID operation with flexible data management capabilities.
Rewritable EEPROM Memory
The built-in EEPROM allows users to store information and modify data when required. This feature makes the card more flexible than standard read-only RFID tags.
Possible stored information includes:
- User identification data
- Access permissions
- Membership information
- Product tracking codes
- Industrial management data
Passive Contactless Operation
The card works without batteries. The RFID reader generates an electromagnetic field that powers the chip during communication.
Advantages include:
- Low maintenance
- Long operating lifetime
- High reliability
- Compact card design
Configurable Data Protection
The EM4450 chip supports configurable memory protection features. Certain areas can be protected from unauthorized modification, helping improve data reliability in practical applications.
How Does a 125kHz EM4450 RFID Card Work?
The EM4450 RFID card operates through inductive coupling between the card antenna and the RFID reader.
The communication process includes:
- The RFID reader generates a 125kHz electromagnetic field.
- The card antenna receives energy from the field.
- The EM4450 chip becomes activated.
- Stored information is transmitted back to the reader.
- The reader processes the received RFID data.
Because the card does not contain a battery, it offers excellent durability and requires minimal maintenance.
EM4450 RFID Card vs Standard 125kHz RFID Card
Many traditional 125kHz RFID cards use chips such as EM4100 or TK4100, which are mainly designed for fixed identification.
The EM4450 provides additional memory and rewriting capability.
| Feature | EM4450 RFID Card | EM4100 RFID Card |
|---|---|---|
| Frequency | 125kHz | 125kHz |
| Data Storage | EEPROM memory | Fixed ID only |
| Rewrite Function | Yes | No |
| Data Update | Supported | Not supported |
| Application Flexibility | High | Basic |
| Security Options | More configurable | Limited |
| Typical Use | Advanced RFID systems | Simple identification |
The EM4450 is a better choice when applications require changing information or storing additional user data.
EM4450 RFID Card vs T5577 RFID Card
Both EM4450 and T5577 are popular 125kHz writable RFID technologies, but they are designed for different purposes.
| Feature | EM4450 | T5577 |
|---|---|---|
| Frequency | 125kHz | 125kHz |
| Writable Memory | Yes | Yes |
| Memory Structure | EEPROM data storage | Configurable RFID emulation |
| Main Purpose | Data storage applications | RFID testing and cloning applications |
| Security Features | Memory protection options | Basic configuration protection |
| Best For | Access systems and customized RFID projects | Flexible RFID experiments |
For systems requiring stored information management, EM4450 cards are usually more suitable.
125kHz RFID Card vs 13.56MHz RFID Card
RFID cards are commonly divided into low-frequency (LF) and high-frequency (HF) technologies.
| Feature | 125kHz RFID Card | 13.56MHz RFID Card |
|---|---|---|
| Frequency | 125kHz | 13.56MHz |
| Reading Speed | Lower | Higher |
| Communication Range | Short | Short to medium |
| Smartphone NFC Support | No | Usually yes |
| Common Chips | EM4100, EM4450 | MIFARE, NFC chips |
| Cost | Lower | Higher |
| Applications | Access control, ID cards | Payment, NFC systems, smart cards |
The EM4450 is ideal for traditional RFID access systems where NFC compatibility is not required.
Applications of EM4450 Rewritable RFID Cards
Due to its rewritable memory and reliable operation, the EM4450 RFID card is widely used in different industries.
Access Control Systems
EM4450 cards can be used for:
- Employee access cards
- Office entry systems
- Building management
- Restricted area control
The writable memory allows organizations to update user information when necessary.
Employee Identification
Companies can use EM4450 RFID cards for employee management, including:
- Staff identification
- Attendance systems
- Internal authentication
Membership and Loyalty Programs
The rewritable memory enables customized membership applications:
- Customer identification
- Membership status updates
- Service management
Industrial Applications
Industrial environments can use EM4450 cards for:
- Equipment identification
- Production management
- Asset tracking
- Maintenance records
Customized RFID Projects
The card can be customized for various RFID solutions requiring programmable data storage.
Advantages of Choosing EM4450 RFID Cards
Reusable Data Storage
Unlike disposable RFID cards, EM4450 cards allow information updates, reducing replacement costs.
Durable Plastic Construction
PVC and PET materials provide:
- Waterproof performance
- Wear resistance
- Long-term usage capability
Easy Integration
EM4450 cards can be integrated into existing 125kHz RFID systems using compatible readers and software.
Cost-Effective RFID Solution
For applications requiring rewritable functionality without complex smart card technology, EM4450 provides a practical balance between cost and performance.
Customization Options for EM4450 RFID Cards
Manufacturers can provide different customization services according to project requirements.
Available options include:
| Customization Type | Description |
|---|---|
| Card Printing | Logo, image, text, barcode |
| Encoding | Programming RFID data |
| Numbering | Sequential ID printing |
| Material | PVC, PET, ABS options |
| Surface Finish | Glossy or matte |
| Packaging | Customized quantity packaging |
Custom RFID cards are commonly used for enterprise projects, membership systems, and branded identification programs.
EM4450 RFID Card Limitations
Although EM4450 provides rewritable memory, it is important to understand its limitations.
Not Compatible with NFC Phones
Because EM4450 operates at 125kHz, it cannot normally be read by smartphones using NFC technology, which operates at 13.56MHz.
Requires Dedicated RFID Readers
Users need a compatible 125kHz EM4450 RFID reader or writer for card programming and data access.
Not Designed for High-Security Applications
For applications requiring advanced encryption, technologies such as DESFire or secure smart cards may be more suitable.
How to Choose the Right RFID Card?
Choosing an RFID card depends on the required application.
| Requirement | Recommended RFID Type |
|---|---|
| Simple ID identification | EM4100 RFID Card |
| Rewritable data storage | EM4450 RFID Card |
| RFID testing and configuration | T5577 RFID Card |
| NFC smartphone interaction | 13.56MHz NFC Card |
| High-security authentication | Advanced smart cards |
The EM4450 is recommended when users need a balance between affordability, flexibility, and rewritable functionality.
Frequently Asked Questions About EM4450 RFID Cards
Can EM4450 RFID cards be rewritten?
Yes. EM4450 cards contain EEPROM memory that supports data writing and updating with compatible RFID writers.
Does EM4450 work with NFC phones?
No. EM4450 uses 125kHz technology, while smartphone NFC operates at 13.56MHz.
Is EM4450 RFID card waterproof?
Yes. Standard PVC and PET RFID cards provide good resistance against water, dust, and daily wear.
What reader can read EM4450 cards?
A dedicated 125kHz RFID reader or writer that supports EM4450 communication is required.
How long can an EM4450 RFID card last?
The service life depends on the card material and usage environment, but high-quality RFID cards are designed for years of repeated operation.
Why Choose Our EM4450 RFID Cards?
Our EM4450 RFID cards provide a reliable solution for organizations requiring programmable 125kHz RFID technology.
With professional manufacturing capabilities, we support:
- Custom card printing
- RFID encoding services
- Flexible order quantities
- Consistent quality control
- Project-based customization
Whether used for access control, identification, membership, or industrial applications, EM4450 RFID cards offer a practical and economical RFID solution.
Conclusion
The 125kHz EM4450 rewritable RFID card is a versatile passive RFID solution that combines reliable wireless communication with flexible EEPROM data storage. Compared with standard read-only RFID cards, it provides greater functionality for applications requiring programmable information.
For businesses looking for a customizable, durable, and cost-effective RFID card, the EM4450 offers an excellent option for modern identification and management systems.
Partner with us for high-quality 125kHz EM4450 rewritable RFID cards with flexible customization options.
