The **WCT-54B-R** is a specific electronic component, typically categorized as a **Wireless Charging Transmitter (Coil)** assembly. These modules are designed to facilitate the inductive transfer of energy from a power source to a receiver device (like a smartphone or wearable). Below is a detailed breakdown of its electronic characteristics and construction. --- ### 1. Key Technical Specifications The WCT-54B-R is built to meet standardized wireless power requirements. | Feature | Description | | :--- | :--- | | **Component Type** | Wireless Charging Transmitter Coil | | **Inductance** | Typically around 24.0 µH (standard for Qi transmitters) | | **DC Resistance (DCR)** | Low (usually < 100 mΩ) to minimize heat loss | | **Core Material** | Ferrite (sintered or flexible sheet) | | **Wire Type** | Litz wire (multi-strand) to reduce Skin Effect | | **Shielding** | Integrated Ferrite plate for magnetic flux direction | --- ### 2. Core Electronic Parts The assembly is composed of several critical sub-components: #### A. Litz Wire Coil The actual circular winding is made of **Litz wire**. This consists of multiple thin strands of wire insulated from each other and twisted together. * **Purpose:** At high frequencies (100kHz - 200kHz used in wireless charging), electricity tends to flow on the surface of a conductor (Skin Effect). Litz wire maximizes surface area to reduce resistance and heat. #### B. Ferrite Shielding Plate The coil is mounted on a dark, brittle plate made of ferrite material. * **Purpose:** It acts as a "magnetic mirror." It prevents the magnetic field from interfering with the electronics behind the charger and focuses the energy toward the receiver coil. #### C. Adhesive and Terminals * **Terminals:** The two ends of the Litz wire are usually pre-tinned (soldered) for easy connection to a PCB. * **Adhesive:** Usually features a 3M or equivalent thermal adhesive backing for mounting within a plastic housing. --- ### 3. Functional Working Principle 1. **Input:** An AC current (driven by a Bridge Inverter on the PCB) flows through the WCT-54B-R. 2. **Magnetic Field:** The coil generates an oscillating magnetic field. 3. **Induction:** When a receiver coil (in a phone) is placed nearby, the magnetic field induces a current in the second coil (Faraday's Law). 4. **Resonance:** The WCT-54B-R is tuned to a specific resonant frequency to maximize efficiency. --- ### 4. Applications * **Qi-Standard Chargers:** Used in 5W to 15W wireless charging pads. * **Industrial Tools:** Embedded charging for handheld scanners. * **Furniture Integration:** Built-in chargers for desks and nightstands.