The **WPT-201-R** is a specific electronic component typically categorized as a **Surface Mount Device (SMD) Power Inductor** or a specialized **Wireless Power Transfer (WPT) coil module**, often associated with brands like Toko (now part of Murata) or similar high-frequency component manufacturers. Below is a detailed breakdown of its electronic characteristics and specifications. --- ### 1. General Specifications The WPT series is designed for high-efficiency power conversion and signal filtering. | Parameter | Typical Value / Description | | :--- | :--- | | **Component Type** | Power Inductor / WPT Coil | | **Mounting Type** | SMD (Surface Mount Device) | | **Core Material** | Ferrite (High permeability) | | **Shielding** | Magnetically Shielded | | **Primary Use** | DC-DC Converters, Wireless Charging, RF Filtering | --- ### 2. Key Electronic Characteristics The "201" and "R" in the part number usually denote specific electrical values and tolerance levels: * **Inductance Value:** In standard naming conventions, "201" typically refers to **200 $\mu$H** (20 followed by 1 zero). However, depending on the specific manufacturer's datasheet, it may represent a physical size code ($2.0 \times 1.25$ mm). * **DC Resistance (DCR):** Usually very low to minimize power loss and heat generation during high-current operation. * **Saturation Current ($I_{sat}$):** The maximum current at which the inductance drops by a specified percentage (usually 30%). * **Operating Temperature:** Generally rated for **-40°C to +125°C**, making it suitable for industrial or automotive applications. --- ### 3. Internal Construction The device is built to handle electromagnetic interference (EMI) effectively: 1. **Ferrite Drum Core:** Provides the necessary magnetic flux path. 2. **Copper Wire:** Precision wound to achieve specific inductance with minimal parasitic capacitance. 3. **Magnetic Shield:** A ferrite epoxy or sleeve that encloses the coil to prevent the magnetic field from interfering with neighboring components. --- ### 4. Application Areas The WPT-201-R is commonly found in the following electronic circuits: * **Wireless Power Receivers:** Used in the resonant tank circuit to pick up energy from a transmitter. * **Portable Electronics:** Smartphones, wearables, and medical sensors where space is limited. * **Power Management Integrated Circuits (PMICs):** Serving as the energy storage element in switching regulators. --- ### 5. Footprint (Mechanical Data) Since it is an SMD part, the physical dimensions are critical for PCB design: ```text [ Top View ] [ Side View ] _______ _______ | | | | | 201 | |_______| <-- Height (H) |_______| [_______] <-- Solder Terminals (L x W) ``` *Note: Precise dimensions should be verified via the manufacturer's specific datasheet (e.g., Murata or Toko).*