### Overview of the WCT-1D2-R The **WCT-1D2-R** is a specific electronic component often associated with wireless charging technologies, specifically acting as a **Wireless Charging Transmitter Coil** or a module related to the Qi-standard power transfer. Below is a breakdown of its technical specifications, construction, and applications. --- ### Technical Specifications | Parameter | Description | | :--- | :--- | | **Component Type** | Wireless Charging Transmitter Coil / Module | | **Inductance** | Typically ranges between 6.3µH to 24µH (depending on specific revision) | | **DC Resistance (DCR)** | Low resistance (typically < 100 mΩ) to minimize heat loss | | **Material** | Ferrite Base with Litz Wire winding | | **Standards Compliance** | WPC (Wireless Power Consortium) / Qi Standard | | **Operating Temperature** | -25°C to +85°C | --- ### Key Electronic Components & Construction #### 1. The Coil (Litz Wire) The primary functional part is the coil made of **Litz wire**. This type of wire consists of multiple thin strands insulated from each other and twisted together. This design reduces **skin effect** and **proximity effect** losses, which are critical at the high frequencies (110–205 kHz) used in wireless charging. #### 2. Ferrite Shielding The coil is mounted on a **Ferrite sheet**. This serves two purposes: * **Flux Concentration:** It directs the magnetic field toward the receiver (smartphone/device), increasing efficiency. * **EMI Shielding:** It prevents the magnetic field from interfering with the electronics located behind the transmitter. #### 3. Adhesive Layer Most "R" suffix versions (like the WCT-1D2-R) include a pressure-sensitive adhesive (PSA) on the back for easy mounting into plastic enclosures. --- ### Operational Role In an electronic circuit, the WCT-1D2-R acts as the **Inductor (L)** in a resonant LC circuit. 1. **Oscillation:** An AC current is passed through the coil by a driver IC. 2. **Magnetic Field:** The coil converts electrical energy into an alternating magnetic field. 3. **Induction:** When a receiver coil (in a phone) is placed nearby, the magnetic field induces a current in the receiver coil via **Faraday’s Law of Induction**. --- ### Applications * **Consumer Electronics:** Qi-certified wireless charging pads. * **Industrial:** Sealed sensors that cannot have exposed charging ports. * **Automotive:** Integrated phone charging docks in vehicle consoles. ---