125kHz RFID technology remains a staple for access control, asset tracking, and simple identification projects. This guide highlights five well-regarded 125kHz options, including writable and read-only tags with copper coil antennas and compact fobs. Each item is chosen for reliable performance, broad compatibility, and clear applicability to entry systems and identification tasks. Read on for concise specifications, practical usage notes, and a buying guide to help you compare options side by side.
| Product | Brand | Key Features |
|---|---|---|
| 5/10Pcs RFID ID 125KHz T5577 Writable Rewritable Copper 38MM Coil | dytcfly | 125kHz, writable, 38mm coil, supports 85-bit formats, vast code range |
| Rosslare AT-ERK-26A-7RB0 Proximity Key Fob Read-Only Tag | Generic | 125kHz, read-only, copper coil antenna, IP68, long read range |
| 125khz RFID fob Writable Tags T5577 (10 Pcs) | HYYIKA | 125kHz, rewritable, includes keychain, supports multiple formats, versatile |
| ETEKJOY 10 PCS Writable 125kHz RFID Key Fob Proximity | ETEKJOY | 125kHz, writable, 2.5–10 cm sensing, not compatible with 13.56MHz systems |
| Aepiraza 50Pcs 125kHz Writable Rewritable T5577 Fob Tag | Aepiraza | 125kHz, writable, T5577-compatible, blank tags for custom IDs |
5/10Pcs RFID ID 125KHz T5577 Writable Rewritable Copper 38MM Coil
Brand: dytcfly. Features include 125kHz operation, writable rewritable capability, and a compact 38mm coil. These tags are designed for easy programming and use with standard 125kHz readers, making them suitable for entry systems and low-cost projects. The package includes multiple fobs or cards to simplify bulk deployment. Important: ensure your reader supports 125kHz and the T5577 format before writing data.
Aepiraza 50Pcs 125kHz Writable Rewritable T5577 Fob Tag
Brand: Aepiraza. Features include rewritable 125kHz T5577 chips, compatibility with multiple 125kHz formats, and a blank tag design ideal for custom ID assignment. The kit is suitable for projects requiring bulk, blank fobs for later programming with a 125kHz writer. Some systems may require specific format compatibility; research your reader’s support before use.
ETEKJOY Writable 125kHz RFID Key Fob Proximity ID Card
Brand: ETEKJOY. This set includes blank 125kHz fobs suitable for writing in 125kHz IDs. Not compatible with 13.56MHz systems. The note emphasizes the need for a 125kHz writer to program the data before use, making these tags a blank slate for controlled access applications.
ETEKJOY 100 PCS 125KHz Key Fob Proximity ID Card Token
Brand: ETEKJOY. These 125kHz key fobs are read-only by default, suitable for fixed ID systems. They are not NFC or encrypted; pre-programmed IDs are present on some models, requiring caution to match with your control system. They are commonly used for basic access control and asset-tracking tasks in low-cost deployments.
125KHZ EM4100 RFID Sticker 30mm Read Only
Brand: YARONGTECH. This is a compact, 30mm EM4100 sticker tag with read-only capability. It is designed for labeling assets or adding a low-profile credential to a system that supports EM4100-compatible 125kHz reads. It is not rewritable and should be used where static IDs are sufficient. Avoid sticking on metal surfaces for optimal performance.
Buying Guide: Key Considerations for 125kHz RFID Coils and Tags
- Frequency compatibility: Ensure your reader and system operate at 125kHz. Some products on the market support both 125kHz and 13.56MHz, but cross-frequency use is not universal.
- Tag type: Decide between writable (T5577) and read-only tags. Writable tags enable custom IDs and backups, while read-only tags provide fixed credentials with good durability.
- Form factor: Coils, fobs, and stickers differ in size and mounting. Choose a form that fits your access reader, door hardware, or asset labeling needs.
- Durability: For outdoor or harsh environments, IP-rated or ruggedized tags (like IP68-rated fobs) offer greater reliability.
- Data formats: If you plan to write data, confirm compatibility with your writer and the tag’s supported formats (EM4100, T5577, etc.).
- Write life and reuse: Rewritable tags enable ongoing updates but require a compatible writer and proper handling to prevent data loss.
- Security considerations: Read-only tags reduce risk of cloning. Rewritable tags require secure programming workflows to prevent unauthorized data changes.
- Installation and mounting: Some tags include keychains or adhesives. Consider how you’ll attach or deploy the tags in your system.
- Reader distance and material: Metal surfaces and interference can affect read distance. Plan placement and shielding as needed.
In summary, 125kHz coil antennas and tags provide straightforward, low-cost solutions for access control and simple identification tasks. When selecting a kit, verify the intended system compatibility, the ability to program or rewrite data, and the durability required for your environment.