RFID Key Tag for 125kHz Access Systems
ABS RFID Keychain Tag for Proximity ID Use
An RFID key tag is a compact contactless credential used with compatible RFID readers for access control, membership identification, locker access, and user verification.
This product is an ABS keychain-style RFID tag for 125 kHz proximity systems. It is suitable when users need a portable key fob instead of a standard card.
The correct tag depends on the installed reader and required chip format.
Key Features
- Compact Keychain Credential
The key tag can be attached to keys, lanyards, bags, or user badge sets for daily access use. - Close-Range Proximity Identification
The tag works with compatible 125 kHz LF readers for close-range user identification. - ABS Housing for Daily Handling
The ABS shell protects the internal RFID chip during routine use in offices, gyms, apartments, hotels, and locker systems. - Custom Visible Identification
The outer surface can support logo printing, serial number, laser ID, barcode, QR code, or color selection for user management.
Technical Specifications
| Feature | Specification |
|---|---|
| Product Type | RFID key tag / 125 kHz RFID key fob proximity ID tag |
| Form Factor | ABS keychain tag / key fob / ring tag |
| RFID Type | Passive LF RFID |
| Frequency | 125 kHz |
| Common Read-Only Chip Options | TK4100, EM4200, EM4100-compatible options |
| Writable Chip Option | T5577 / ATA5577-type chip, when programming is required |
| Reading Method | Close-range scan by compatible 125 kHz RFID reader |
| Read Range | Typically up to 10 cm, depending on reader, chip, antenna, and installation environment |
| Material | ABS housing; PVC or epoxy options by project requirement |
| Color Options | Blue, black, red, yellow, white, green, or custom color |
| Printing Options | Logo, serial number, laser marking, barcode, QR code, or custom text |
| Encoding Options | Fixed ID matching, UID/code matching, T5577 programming, or database association |
| Compatibility Note | Not automatically compatible with NFC, MIFARE, 13.56 MHz HF, or UHF RFID systems |
RFID key tag compatibility should be tested with the actual reader, software format, and required code structure before bulk production.
Typical Applications
- Building Access Control
Used for office doors, apartment entrances, residential gates, and staff access points. - Gym and Club Membership
Used as a portable member credential for reception check-in, entry control, or locker access. - Hotel and Resort Access
Used for room access, staff areas, pool areas, lockers, or shared facilities when the installed system supports 125 kHz RFID. - Time Attendance Systems
Used by employees, contractors, or service teams for close-range attendance verification. - Parking and Gate Entry
Used as a keychain credential for residential parking, gated communities, and controlled vehicle access points.
Which RFID Key Tag Chip Should You Choose?
| Chip Option | Data Type | Suitable Use | Compatibility Note |
|---|---|---|---|
| TK4100 | Read-only fixed ID | Basic 125 kHz access control and replacement credentials | ID cannot normally be rewritten |
| EM4200 | Read-only fixed ID | EM-compatible LF reader systems | Reader output format should match the software |
| EM4100-compatible | Read-only fixed ID | Legacy proximity access systems | Confirm data format before production |
| T5577 | Writable or configurable | Projects requiring programmed or cloned-format 125 kHz credentials | Requires compatible reader, writer, and data format |
Choose TK4100, EM4200, or EM4100-compatible options when the system only needs a fixed proximity ID.
Choose T5577 when the project requires a writable 125 kHz key tag and the reader/writer system supports the required format.
125kHz RFID Key Tag vs 13.56MHz RFID Key Fob
| Comparison Point | 125kHz RFID Key Tag | 13.56MHz RFID Key Fob |
|---|---|---|
| Frequency | 125 kHz LF | 13.56 MHz HF/NFC |
| Common Chips | TK4100, EM4200, T5577 | MIFARE, NTAG, DESFire, or other HF chips |
| Smartphone NFC Use | Not supported | Possible with compatible NFC chips |
| Typical Reader | 125 kHz proximity reader | HF/NFC reader |
The external key fob shape can look similar, but the internal chip and reader compatibility are different.
Confirm the installed reader frequency before ordering RFID key tags.
Need RFID Key Tags for an Existing Access System?
Send one working card or key fob, the reader model, or the required data format before production.
Our RFID specialist can help check chip compatibility, programming requirements, printing method, color selection, and whether a read-only or writable 125 kHz RFID key tag is more suitable.
Sample testing is recommended when replacing existing access cards, gym tags, hotel fobs, locker credentials, or parking keychains.
FAQ
What is an RFID key tag?
An RFID key tag is a small keychain-style RFID credential used to identify a user or item with a compatible RFID reader.
What is a 125khz RFID key fob proximity ID tag?
It is a passive LF RFID key fob used with 125 kHz proximity readers for close-range access control or identification.
Can RFID key tags be reprogrammed?
Only writable chip options such as T5577 can be programmed with compatible equipment. TK4100 and EM4200 options are normally used as read-only credentials.
Can this RFID key tag replace my existing access card?
Yes, but only if the frequency, chip type, data format, and reader output match your existing access system.
Is a 125 kHz RFID key tag the same as NFC?
No. A 125 kHz RFID key tag is not NFC. NFC operates at 13.56 MHz and requires compatible HF/NFC chips and readers.
What affects RFID key tag reading performance?
Reading performance depends on chip type, reader model, antenna design, tag position, scan distance, surrounding materials, and software response time.
Get Your Custom RFID Tags
As a leading custom RFID tag manufacturer, we craft solutions based on the unique needs of your operation. We offer a wide range of customization options, including material, size, frequency, encoding, and read distance, ensuring each RFID Tag is perfectly customized to your requirements. No matter what application you use RFID tags for, we can provide rugged, reliable RFID tags that meet the highest quality and durability standards. Here are the main ways we customize RFID tags to fit your needs.
Material Selection
Material is key for customizing RFID tags. Plastic works in harsh conditions, while softer materials suit delicate spaces. Different materials also affect signal performance. Pick what fits your use case to ensure your tags last and work reliably.
Customized Size
Size shapes usability. Small tags fit tight spaces or tiny items, while larger tags are easily read. In crowded areas, sleek tags prevent clashes. Align shape and dimension with your goods for visibility, convenience, and performance.
Frequency Requirements
Choose LF, HF, or UHF based on read range, speed, and interference. LF and HF resist metals and liquids but have shorter ranges. UHF offers an extended range yet may face signal blocks. Match frequency to your environment for reliable performance.
Reading Distance
Define the distance at which you have to read the tag. Short distances work for retail checkouts, while warehouses may need meters of coverage. Antenna design, reader settings, and power outputs affect range.Adjust these factors to capture data accurately at the distance you need.
Encode
Plan how data is stored on each tag. Some only hold an ID, while others contain detailed info. Decide if you need a simple EPC or added user memory. Ensure your chosen format works with existing software. Proper encoding streamlines processes and slashes errors.
Application Environment
Consider real-world conditions. Temperature swings, humidity, and chemicals can degrade tags. For outdoor use, opt for UV-resistant casings. In healthcare or food settings, ensure compliance with safety rules. Matching your tags to the environment maximizes their lifespan.
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Customize any RFID tags from our factory to meet your requirements.
