125khz 26bit RFID Access Control blank HID Cards

125kHz 26-bit RFID access control cards are widely used for door entry, employee identification, time attendance, parking access, and other proximity-based identification systems. These contactless cards provide a simple and cost-effective way to identify authorized users without requiring a battery or physical contact with the reader.

Our blank RFID cards are available with different 125kHz low-frequency chip options, including TK4100, EM4200, and ATA5577. Depending on the access control system, the cards can be supplied as standard blank cards, printed cards, numbered cards, or encoded credentials.

The standard card format is similar to a conventional bank card, making it convenient for employees, students, residents, visitors, and members to carry in a wallet or card holder.

What Is a 125kHz RFID Access Control Card?

A 125kHz RFID card is a passive low-frequency RFID credential designed to communicate with compatible proximity readers.

Unlike an active RFID device, the card does not require an internal battery. When the card is placed close to a compatible 125kHz reader, the reader generates an electromagnetic field that powers the RFID chip. The chip then sends its identification data back to the reader.

The access control system uses this identification data to determine whether the user is authorized to enter.

This simple architecture makes 125kHz RFID cards suitable for applications where reliable identification and easy deployment are more important than high-capacity data storage or advanced contactless payment functions.

Specification

Material: PVC, ABS,PET
Surface: glossy, matte, frosted
Size: 85.5*54*0.84mm, or customized
Frequency: 125khz

HID provides the industry’s broadest range of smart card-based credentials such as cards, tags, and keyfobs. As part of its portfolio, HID offers non-technology IDs as well as single technology, multi-technology, and contact chip-based smart.

26-Bit RFID and Wiegand 26 Explained

The terms 26-bit RFID and 125kHz RFID describe different aspects of an access control system.

125kHz refers to the radio frequency used between the card and reader, while 26-bit generally refers to the data format used by the access control system.

For example, a 125kHz proximity reader may read a card ID and transmit the credential to an access controller using Wiegand 26-bit communication.

It is important to verify the complete system specification before ordering cards. A card being labeled “125kHz” does not automatically mean that it will work with every 125kHz access control system.

125kHz RFID Card Chip Options

Different projects may require different chip configurations. Selecting the correct chip is one of the most important steps when replacing or expanding an existing access control card system.

TK4100

TK4100 is commonly used for basic 125kHz identification applications. It is suitable for systems that only need a card identification number rather than large amounts of user data storage.

Typical applications include:

• Door access control
• Employee identification
• Attendance systems
• Parking access
• Membership identification

EM4200

EM4200 is another commonly used low-frequency proximity chip for identification applications. It is frequently found in 125kHz RFID cards and tags used with compatible readers.

ATA5577

ATA5577 is a more flexible option for applications requiring configurable or writable LF RFID credentials. It can be useful for system integrators and projects where credential configuration requirements differ from standard fixed-ID cards.

Because chip compatibility depends on the reader and access control system, buyers should confirm the required chip type and card format before placing a production order.

125kHz RFID Card Comparison

Choosing the right RFID card depends on the access control infrastructure rather than frequency alone.

This comparison is a general technical guide. Actual compatibility must always be confirmed against the target reader and access controller.

125kHz vs. 13.56MHz RFID Cards

125kHz and 13.56MHz are two common RFID frequency ranges, but they are not interchangeable.

125kHz cards are often selected for straightforward proximity identification and legacy access control installations. They are simple, economical, and widely supported by compatible LF readers.

13.56MHz cards can provide more advanced functionality depending on the chip, including larger memory capacity, application data, and stronger security features on certain platforms.

If an existing access control system already uses 125kHz proximity cards, replacing the credentials with another compatible 125kHz card is usually more straightforward than changing the entire reader infrastructure.

Standard Card Size and Construction

The standard card measures 85.5 × 54 × 0.84 mm, providing a familiar credit-card-style format.

PVC is commonly selected for general-purpose access cards because it offers a good balance between cost, print quality, and durability. PET and ABS options can also be considered when project requirements call for different material characteristics.

Available surface finishes include:

• Glossy
• Matte
• Frosted

The card construction can be customized according to the intended application, branding requirements, and printing process.

Custom Printing and Branding

Blank RFID cards do not have to remain visually blank.

For corporate access control systems, customized printing can transform the RFID card into an employee identification credential while retaining its contactless function.

Available customization options include:

• Full-color CMYK printing
• Silk-screen printing
• Digital printing
• Company logo
• Employee name
• Employee photograph
• Card number
• Serial number
• Barcode
• QR code
• Signature panel
• Magnetic stripe

For large organizations, consistent card artwork and sequential numbering can make card issuance and credential management easier.

RFID Card Encoding and Numbering

For access control projects, physical card printing and electronic credential programming are two different processes.

Printing places visible information on the card, such as a company logo or employee number. Encoding or programming determines the electronic data stored or transmitted by the RFID chip.

Depending on the selected chip and application, cards may be supplied with:

• Predefined identification numbers
• Sequential numbering
• Customer-specified numbering
• Encoded credentials
• Printed serial numbers
• Barcode identification

Before production, customers should provide the required card format or a sample credential whenever possible. This allows the supplier to verify the chip and numbering requirements before mass production.

Reading Distance

The stated reading distance for these low-frequency RFID cards is approximately 3–10 cm, although actual performance depends on the complete RFID system.

Important factors include:

1. RFID reader output power
2. Reader antenna design
3. Card antenna quality
4. Installation position
5. Presence of metal surfaces
6. Electromagnetic interference
7. Reader sensitivity
8. Card orientation

Therefore, the published reading distance should be treated as a reference rather than a guaranteed result for every installation.

For access control, a relatively short reading distance can actually be beneficial because users normally need to intentionally present the card to the reader.

Applications of 125kHz RFID Access Cards

125kHz proximity cards are used in many identification and access management environments.

Office Access Control

Businesses can issue RFID cards to employees and contractors for controlled entry to offices, meeting areas, warehouses, and restricted rooms.

Factory and Industrial Access

Manufacturing facilities can use proximity cards to manage access to production areas, equipment rooms, storage areas, and employee entrances.

Residential Buildings

Apartment buildings and residential communities can use RFID credentials for entrance doors, gates, elevators, parking areas, and shared facilities.

Schools and Universities

RFID cards can be used for student and staff identification, building access, attendance, and other campus management applications.

Parking Systems

Compatible RFID credentials can identify authorized drivers or users at parking entrances and controlled vehicle areas.

Time Attendance

125kHz cards can also be used with compatible attendance terminals to record employee check-in and check-out events.

Why Choose 125kHz RFID Cards?

For many existing access control installations, the main advantage of 125kHz technology is compatibility with established infrastructure.

Key benefits include:

• Contactless operation
• No battery required
• Compact wallet-sized format
• Simple user operation
• Low maintenance requirements
• Wide range of card materials
• Custom printing options
• Suitable for high-volume production
• Easy distribution to employees or members
• Compatible with many legacy proximity systems

125kHz RFID technology remains relevant because many organizations prioritize reliable credential identification and compatibility with existing access control equipment over advanced smart-card functionality.

How to Select the Right 125kHz RFID Card

Before ordering, check these five points:

If the cards are intended to replace an existing credential, providing the supplier with the existing card model, reader model, or system specification can significantly reduce compatibility problems.

How the RFID Access Process Works

A typical 125kHz access control process is straightforward:

Step 1: The user presents the RFID card near the reader.

Step 2: The reader generates the electromagnetic field needed to activate the passive card.

Step 3: The RFID chip transmits its identification information.

Step 4: The reader sends the credential data to the access controller.

Step 5: The controller checks whether the credential is authorized.

Step 6: If authorization is successful, the door or gate is released.

This contactless process eliminates the need to insert a card into a reader and allows fast identification during normal daily use.

Bulk Ordering and OEM Customization

For distributors, system integrators, access control installers, and project contractors, RFID cards can be customized for specific deployments.

Common OEM requirements include:

• Custom card artwork
• Company logo
• Custom card numbering
• Chip selection
• Credential encoding
• Barcode printing
• Magnetic stripe
• Signature panel
• Custom packaging
• Special card dimensions

The supplier lists a production capacity of up to 8 million cards per month and a typical lead time of 7–9 working days, making the product suitable for both regular inventory supply and larger access control projects.

Quality and Production Considerations

For access control cards, consistency between batches is important. A card may look identical to the previous batch while using a different chip configuration, numbering format, or credential structure.

For this reason, bulk buyers should establish the following specifications before production:

• Exact RFID chip
• Frequency
• Card dimensions
• Thickness
• Printed artwork
• Numbering sequence
• Encoding requirements
• Packaging quantity
• Quality inspection criteria

The product information lists ISO9001, SGS, RoHS, and EN71 among its certifications or quality-related credentials. Buyers with project-specific compliance requirements should request the applicable documentation for the exact card configuration being supplied.

FAQ

Are 125kHz RFID cards compatible with every access control reader?

No. The reader must support the card’s frequency, chip technology, and credential format. Always verify compatibility before ordering in bulk.

Is a 26-bit card always a HID card?

Not necessarily. “26-bit” generally describes a data format, while HID refers to a particular access-control technology and product ecosystem. A complete system specification should be checked rather than relying on the terminology alone.

Can the RFID card be customized with a company logo?

Yes. Options include CMYK full-color printing, silk-screen printing, and digital printing. Additional customization such as numbering, barcodes, and signature panels can also be available.

Can these cards be encoded?

Encoding is available depending on the selected chip and the customer’s system requirements. The required credential format should be confirmed before production.

What is the normal reading distance?

The listed reference range is approximately 3–10 cm for LF cards, but the actual distance depends on the reader, card, antenna, installation environment, and other factors.

Can I order a sample before bulk production?

For an access control project, testing a sample with the actual reader is strongly recommended before placing a large order. This is especially important when replacing an existing card or matching a legacy system.

Final Buying Checklist

Before purchasing 125kHz 26-bit RFID access control cards, make sure you can answer the following questions:

• Is the existing reader operating at 125kHz?
• Which RFID chip is required?
• Does the access controller use Wiegand 26-bit or another credential format?
• Does the existing card have a specific facility code or card number structure?
• Is the standard 85.5 × 54 mm card size suitable?
• Do you need custom printing?
• Do you need sequential numbering?
• Do you require electronic encoding?
• How many cards are required?
• Has the card been tested with the actual reader?

A sample compatibility test is the safest way to confirm that a new RFID card will work with an existing access control system.

Request a Quote for 125kHz RFID Access Cards

Whether you need standard blank proximity cards, customized employee access cards, encoded RFID credentials, or high-volume OEM production, the card specification should be matched to your existing access control system before manufacturing.

Provide the required frequency, chip type, card quantity, card artwork, numbering format, and encoding requirements when requesting a quotation. For replacement projects, supplying a sample card or compatible reader information can help confirm the correct configuration.

This approach reduces compatibility risks and makes it easier to produce a consistent batch of 125kHz RFID access control cards for your project.

Feel free to contact us to discuss your needs.