# TK4100 Clamshell Card: The Ultimate Guide to RFID Technology ## Introduction to TK4100 Clamshell Card The **TK4100 clamshell card** represents a cornerstone in the world of low-frequency RFID technology. As someone who has worked with access control systems for over a decade, I've witnessed firsthand the evolution of RFID cards. I recall a project for a corporate client where we upgraded their entire security system. The transition from magnetic stripe cards to **TK4100 clamshell cards** was not just a technological shift but a cultural one. Employees were initially skeptical, but the reliability and ease of use quickly won them over. The smooth, durable clamshell design felt premium in hand, and the seamless tap-to-enter experience transformed their daily routine. This personal experience solidified my view that the right hardware, like a well-made clamshell card, is critical for user adoption and system success. ## What is a TK4100 Clamshell Card? A **TK4100 clamshell card** is a passive, read-only RFID transponder card operating at 125 kHz. The "clamshell" refers to its specific manufacturing process where two sheets of PVC are fused (like a clamshell) around the inlay and chip, creating a highly durable and waterproof card. The heart of this card is the EM4100-compatible TK4100 chip, a global standard for low-frequency RFID applications. ### Technical Specifications and Detailed Parameters Providing precise technical specifications is crucial for integrators and developers. Below are the detailed parameters for a standard **TK4100 clamshell card**. *Please note: The following technical parameters are for reference data. Specifics, including exact chip lot codes or custom dimensions, require consultation with our backend management team.* * **Operating Frequency:** 125 kHz ± 5 kHz * **Chip Type:** TK4100 (Fully compatible with EM4100, EM4102, and EM4105 protocols) * **Chip Code:** Typically follows the 64-bit Read-Only Manchester encoding format. Common configurations include 8-bit facility code + 16-bit ID code, or 32-bit unique ID. The specific pre-programmed ID is factory-set and unalterable. * **Read Range:** Typically 2-10 cm (0.8-4 inches), depending on the reader's power and antenna design. * **Data Retention:** >10 years * **Write/Erase Cycles:** Read-Only memory. The uniqu

Technical Specifications

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