125kHz T5577 ABS RFID Key Fob
Frequency：125KHz
Color:Blue
Product name:Key Fob RFID
125kHz T5577 ABS RFID Key Fob For Access Control
Key Fob RFID is a passive 125kHz contactless access credential designed for door entry, time attendance, membership identification, elevator control, parking access and other low-frequency RFID systems. This ABS RFID key fob uses a compatible T5577 rewritable chip, making it suitable for authorized system administrators who need programmable RFID key tags for replacement, project deployment or bulk access control management.
Compared with standard PVC access cards, an ABS RFID key fob is easier to carry on a key ring, more convenient for daily use and better suited for apartments, offices, schools, gyms, hotels, residential communities and staff entrance control. The compact 35x28mm housing is lightweight, waterproof for normal daily handling and available in several stock colors for fast order fulfillment.
This product is intended for authorized access control projects only. Before ordering, buyers should confirm the reader frequency, chip type, encoding format and system compatibility. If your current system requires read-only credentials, you may also compare this item with our 125kHz EM4100/TK4100 read-only key fobs.
Typical Applications
This T5577 RFID key fob is mainly used for authorized low-frequency access systems where a compact, reusable and easy-to-carry credential is required.
| Application Scenario | How The RFID Key Fob Helps |
| Apartment and residential access | Easy keychain carrying for tenants, property staff and authorized visitors. |
| Office and factory entrance | Supports employee identification, door access and time attendance systems. |
| Gym and club membership | Convenient member check-in credential with logo and color customization. |
| Hotel and serviced apartment systems | Useful for staff areas, locker access, maintenance access and internal management. |
| Parking and elevator control | Short-range contactless identification for authorized access points. |
| School and campus access | Compact credential for students, teachers and facility staff. |
For mixed-frequency projects where both 125kHz and 13.56MHz systems are used, consider a dual-frequency RFID key fob for mixed systems. If your access system uses high-frequency MIFARE technology, view the 13.56MHz MIFARE 1K key fob option.
Product Parameters
| Product name | 125kHz T5577 ABS RFID Key Fob |
| Chip | Compatible T5577 rewritable chip |
| Frequency | 125kHz low frequency RFID |
| RFID standard reference | LF RFID below 135kHz; project compatibility should be confirmed with the access control reader |
| Operating distance | Typically 2-5cm, depending on reader model, antenna design and installation environment |
| Working life | More than 100,000 read/write cycles under normal use conditions |
| Working type | Passive, contactless, read/write |
| Operating temperature | -40℃ to 75℃ |
| Storage temperature | -50℃ to 80℃ |
| Material | ABS plastic housing |
| Size | 35x28mm |
| Color | Blue, green, red, yellow, black; custom colors available for batch orders |
| Accessories | Metal key ring included |
| Customization | Logo printing, color customization, UID/serial number printing, chip encoding and custom packaging |
| Main application | Door access control, time attendance, membership systems, electronic locks and identification systems |
Parameter Notes For Buyers
1. Why 125kHz?
125kHz RFID key fobs are commonly used in short-range proximity access systems. They are suitable for simple identification tasks where the reader only needs to recognize a credential at close distance. If your project uses NFC phones or ISO14443A readers, a 13.56MHz option may be more suitable.
2. What does T5577 rewritable mean?
The compatible T5577 chip can be written and rewritten by suitable 125kHz RFID writing equipment. This is useful for authorized property managers, system integrators and maintenance teams who need programmable key fobs for system deployment or replacement. For security reasons, it should only be used with systems that you own, manage or are authorized to maintain.
3. Why does the read distance vary?
The operating distance of a passive RFID key fob depends on the reader power, antenna size, installation surface, nearby metal, system tuning and chip type. For most access readers, 2-5cm is a practical close-tap range. Sample testing is recommended before large-scale purchase.
4. Is ABS suitable for daily use?
ABS is a practical material for high-volume RFID key tags because it balances cost, durability, weight and molding stability. It is suitable for daily keychain use in apartments, offices, clubs and access control environments. For a different appearance or premium branding, you can also compare ABS vs epoxy RFID key fob material comparison.
How To Choose The Right RFID Credential
| Buyer Need | Recommended Option |
| Need a rewritable 125kHz key tag for authorized access system management | This compatible T5577 ABS RFID key fob |
| Need a simple read-only low-frequency credential | 125kHz EM4100/TK4100 read-only key fobs |
| Need card format instead of keychain format | 125kHz TK4100 white RFID cards |
| Need both LF and HF support in one credential | Dual-frequency RFID key fob for mixed systems |
| Need authorized encoding or rewriting tools | Authorized 125kHz RFID encoding and writing tool |
For more background on system operation, read our guide: how RFID key fobs work for access control.
OEM Customization Options
SynTek supports OEM customization for bulk RFID key fob orders. Buyers can choose stock colors for faster delivery or request custom colors for larger batch production. Logo printing, UID or serial number printing, encoding, customer-specific packaging and mixed color packing can be arranged according to your access control project requirements.
| Customization Item | Available Options |
| Logo | Silk printing, one-color logo, simple brand mark or project identification |
| Color | Common stock colors or custom batch color |
| Encoding | Blank supply or pre-encoded according to customer-approved data format |
| Numbering | UID number, serial number, laser or printed visual ID depending on project needs |
| Packaging | 100pcs/bag, 2500pcs/carton or customized packing for distributors and system integrators |
For custom artwork, data format and packaging requests, visit our OEM RFID key fob customization service or send a project inquiry through the quotation form.
Factory Production And Quality Control
JingZhou Syntek Smart Technology Co., Ltd. was established in 2006 and specializes in RFID key fobs, RFID cards, smart cards, TM tags, RFID microchip tubes and animal ear tags. The factory is equipped with ABS production machines, mold production lines, chip-flip equipment, copper wire production lines and silk printing lines to support stable RFID key fob manufacturing and customization.
For bulk orders, functional testing and visual inspection are important because buyers need consistent reading performance, correct chip type, clean logo printing and stable packaging. SynTek can support pre-production samples before mass production and final inspection before shipment, helping distributors, property access suppliers and system integrators reduce deployment risk.
- Pre-production sample confirmation before mass production.
- Chip type and frequency checking based on order requirements.
- Appearance inspection for ABS housing, color and printing.
- Packaging inspection for quantity, bagging and carton arrangement.
- Support for custom project requirements such as logo, color, numbering and packaging.
Package
- Standard packing: 100pcs/bag
- Standard carton quantity: 2500pcs/carton
- Customized packaging available for wholesale orders, distributors and project delivery
Other RFID Key Fob Types Available
Besides this 125kHz T5577 ABS key fob, SynTek can supply LF, HF and dual-frequency RFID key fob types for different access control systems. If you are not sure which chip is suitable, send us your reader model, current card sample or required frequency and we can help check the matching option.
RFID Standards And Compatibility Reference
For technical reference, low-frequency RFID systems below 135kHz are covered by ISO/IEC 18000-2. HF/NFC products often relate to ISO/IEC 14443 and NFC Forum tag specifications. These references help buyers understand frequency categories, but final compatibility should always be confirmed with the actual reader, controller and software platform used in the project.
FAQ
Q1: What Is This RFID Key Fob Mainly Used For?
This 125kHz T5577 ABS RFID key fob is mainly used for authorized access control, time attendance, electronic door locks, membership identification, parking access and property management systems.
Q2: Is The T5577 Key Fob Rewritable?
Yes. The compatible T5577 chip is a rewritable 125kHz RFID chip. It can be programmed with suitable RFID writing equipment for authorized access system management, testing or replacement projects.
Q3: Can I Use This Key Fob Directly After Receiving It?
It depends on your system. Some buyers need blank key fobs for local encoding, while others need pre-encoded key fobs before shipment. Please confirm your reader frequency, chip type and data format before ordering.
Q4: What Is The Normal Reading Distance?
The typical operating distance is 2-5cm, but the actual distance depends on reader model, antenna power, installation surface and surrounding environment.
Q5: Can I Print My Logo On The RFID Key Fob?
Yes. Custom logo printing is available for OEM orders. Buyers can also request color customization, serial number printing, UID marking, encoding and customized packaging.
Q6: Which Colors Are Available?
Common stock colors include blue, green, red, yellow and black. Other colors can be customized in batches according to order quantity and project requirements.
Q7: What Is The Standard Package?
The standard package is 100pcs/bag and 2500pcs/carton. Customized packing can be arranged for distributors, system integrators and project shipments.
Q8: How Do I Check Compatibility Before Bulk Order?
Please provide your reader frequency, existing credential sample, chip requirement, encoding format or access controller model. Sample testing before mass production is recommended for large projects.
Q9: Do You Support Bulk Order And OEM Production?
Yes. SynTek supports bulk RFID key fob orders, OEM logo printing, color customization, chip selection, data encoding, numbering and customized packaging.
Q10: Who Are You?
JingZhou Syntek Smart Technology Co., Ltd. was established in 2006 and specializes in RFID key fobs, smart cards, TM tags, RFID microchip tubes and animal ear tags for global customers.
Request A Quote For Custom RFID Key Fobs
If you need 125kHz T5577 RFID key fobs for access control, membership systems, property management or OEM distribution, send your chip requirement, quantity, logo file, color preference and encoding needs. Our team can help confirm the suitable RFID key fob type before mass production.
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