100 PCS 125kHz RFID Coin Tag 25mm TK4100/EM4100 PVC Disc Tag

100 PCS 125kHz RFID Coin Tag 25mm TK4100/EM4100 PVC Disc Tag
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  • Product Code:SQ2370
  • Availability: 1000
  • $6.35
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  • Ex Tax:$6.35
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Tags: 125kHz RFID tag, RFID coin tag, TK4100 tag, EM4100 tag, 25mm disc tag, PVC RFID tag, read-only RFID tag, access control tag, proximity coin tag, waterproof RFID tag

The RFID-125kHz-Coin is a circular proximity tag designed for short-range identification in access control, time and attendance, and asset-tracking systems. Operating at 125kHz — the low-frequency (LF) band known for its reliable performance around non-metallic materials — the tag is built around a TK4100/EM4100 compatible chip, which provides a 64-bit read-only unique identifier that is pre-programmed at the factory and cannot be altered. This read-only architecture is well suited to security and identification applications where data integrity is essential.

The 125kHz RFID coin tag is encapsulated in a PVC disc measuring 25mm in diameter with a thickness of approximately 1mm, giving it a compact, coin-like form factor that can be attached to key fobs, badges, tokens, and equipment housings. The waterproof and dustproof construction allows the tag to operate reliably in humid, dusty, and outdoor environments without degradation. As a passive device, it draws its operating power from the reader’s electromagnetic field and requires no battery or maintenance.

The read range is typically 3cm to 10cm, depending on the output power and antenna design of the reader. The tag operates across a temperature range of -20°C to +80°C, making it suitable for both indoor and protected outdoor installations. Typical applications include access control systems, employee attendance terminals, asset and inventory tracking, library book identification, pet and livestock tagging, and product authentication.

125kHz RFID coin tag Application

  1. Access control systems for doors, gates, and turnstiles
  2. Employee time and attendance terminals
  3. Asset tracking and inventory management
  4. Library book and media identification
  5. Pet and livestock identification
  6. Product authentication and anti-counterfeiting
  7. Hotel room key and access cards
  8. Membership and loyalty program tokens

125kHz RFID coin tag Specifications

  1. Product Model: RFID-125kHz-Coin
  2. Operating Frequency: 125 kHz
  3. Compatible Chips: TK4100 / EM4100 (or compatible)
  4. Memory: 64-bit read-only (pre-programmed UID)
  5. Form Factor: Circular coin tag
  6. Diameter: 25 mm
  7. Thickness: ~1 mm
  8. Material: PVC
  9. Water/Dust Resistance: Waterproof and dustproof
  10. Read Range: 3–10 cm (reader-dependent)
  11. Read Time: ~102 ms (typical)
  12. Operating Temperature: -20°C to +80°C
  13. Storage Temperature: -40°C to +100°C
  14. Power Source: Passive (powered by reader field)

Features

  1. 125kHz low-frequency operation for reliable short-range identification
  2. TK4100/EM4100 compatible chip with a factory-programmed 64-bit read-only unique identifier
  3. Compact 25mm circular PVC disc form factor
  4. Waterproof and dustproof construction for harsh environments
  5. Read range of 3–10cm depending on the reader
  6. Fast read time of approximately 102ms
  7. Passive operation with no battery required
  8. Wide operating temperature range of -20°C to +80°C
  9. Suitable for access control, attendance, asset tracking, and identification
  10. Pre-programmed, read-only data for security and integrity
  11. Durable PVC encapsulation for long service life
  12. Compatible with common 125kHz RFID readers
RFID Parameters
Frequency 125KHz
Physical Parameters
Diameter 25mm

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