The **WPT-5CB-R** is a specialized electronic component, typically categorized as a **Surface Mount Device (SMD) High-Current Power Inductor** or a specialized **Wireless Power Transfer (WPT) coil module**, depending on the manufacturer (most commonly associated with high-reliability power magnetic brands). Below is a detailed technical breakdown of its electronic characteristics and construction. --- ### 1. Technical Specifications The "5CB" series generally refers to a specific core size and winding configuration optimized for high efficiency. | Feature | Specification Details | | :--- | :--- | | **Component Type** | Power Inductor / Wireless Charging Coil | | **Mounting Type** | Surface Mount (SMD / SMT) | | **Inductance Range** | Typically 4.7µH to 10µH (varies by sub-revision) | | **Current Rating** | High Saturation Current (usually 3A - 8A) | | **Core Material** | Ferrite or Metal Composite (for high magnetic flux) | | **Shielding** | Magnetically Shielded (to prevent EMI) | | **Operating Temp** | -40°C to +125°C | --- ### 2. Key Electronic Parts & Construction The internal anatomy of the WPT-5CB-R is designed to minimize power loss during energy transfer: * **The Winding (Copper Coil):** Uses high-purity flat or round copper wire. Flat wire is often preferred in the "5CB" series to reduce the "Skin Effect" and lower DC Resistance (DCR), which prevents overheating. * **The Magnetic Core:** Made of a Ferrite-based material that provides a high permeability path for magnetic flux. This is critical for the "Wireless Power Transfer" functionality to ensure maximum coupling. * **The Base/Header:** A heat-resistant plastic or ceramic base with tinned solder pads (the "-R" suffix usually denotes RoHS compliance and lead-free terminals). * **The Shield:** A metallic or ferrite shroud that encapsulates the coil to prevent the magnetic field from interfering with nearby components on the PCB. --- ### 3. Functional Applications This component is primarily used in circuits requiring efficient power conversion or inductive coupling: 1. **Wireless Charging Receivers:** Used in small portable electronics to capture magnetic fields and convert them back into electrical current. 2. **DC-DC Converters:** Acts as a storage element in buck or boost converters where space is limited but high current is required. 3. **EMI Suppression:** Filtering high-frequency noise in power supply lines for automotive or industrial sensors. --- ### 4. Circuit Symbol & Footprint When designing a PCB for the WPT-5CB-R, the following standard representations are used: ```schematic L1 (WPT-5CB-R) +----(UUUUU)----+ | | Input Output ``` * **Footprint:** Usually rectangular with two large solder pads at the ends to handle the thermal load and high current. ---