The **WJPA-231-R** is an electronic component primarily classified as a **Power Inductor**, specifically designed for surface-mount technology (SMT). It is commonly utilized in power management circuits where high efficiency and a compact footprint are required. ### 1. Key Technical Specifications The following table summarizes the typical electronic characteristics of the WJPA-231-R series (specifications may vary slightly based on the specific inductance value variant): | Parameter | Specification (Typical) | | :--- | :--- | | **Component Type** | Shielded Power Inductor | | **Inductance Range** | Typically 1.0µH to 10µH (variant dependent) | | **Tolerance** | ±20% (M) | | **Current Rating (Isat)** | High Saturation Current (up to several Amperes) | | **DC Resistance (DCR)** | Low resistance for high efficiency | | **Operating Temperature** | -40°C to +125°C | | **Mounting Type** | Surface Mount (SMD/SMT) | --- ### 2. Physical Construction The WJPA-231-R is built using specific materials to handle high-frequency switching: * **Core Material:** Usually a Metal Alloy or Ferrite core. The "WJPA" prefix often points to a composite metal powder core, which offers superior saturation characteristics compared to traditional ferrite. * **Shielding:** It is a **Magnetic Shielded** design. This minimizes Electromagnetic Interference (EMI) with neighboring components on the PCB, which is critical for dense mobile electronics. * **Terminals:** Lead-free (RoHS compliant) solder pads for reliable SMT reflow. --- ### 3. Common Applications Due to its high current handling and low DCR, the WJPA-231-R is found in the following electronic modules: 1. **DC-DC Converters:** Used in Buck (step-down) or Boost (step-up) converters to store energy. 2. **Smartphones & Tablets:** Integrated into Power Management Integrated Circuits (PMICs) for CPU/GPU voltage regulation. 3. **Wearable Electronics:** Chosen for its low profile and high efficiency, extending battery life. 4. **HDD/SSD Drives:** Providing stable power filtering for high-speed data storage. --- ### 4. Part Number Breakdown (Generic) * **WJPA:** Series code (usually indicating metal alloy molded inductor). * **231:** Physical dimensions (roughly 2.5mm x 2.0mm, though exact dimensions should be verified in the datasheet). * **R:** Packaging indicator (usually "Tape and Reel"). ---