The **SCDR322520-R10** is a specific part number for a **Surface Mount (SMD) Power Inductor**. This component is commonly used in power management circuits to store energy in a magnetic field and filter electrical noise. --- ### 1. Part Number Breakdown The nomenclature usually follows industry standards for SMD components: | Segment | Meaning | Description | | :--- | :--- | :--- | | **SCDR** | Series Code | Shielded/Unshielded Drum Core Inductor series. | | **322520** | Case Size | Dimensions: Approx. 3.2mm x 2.5mm x 2.0mm. | | **R10** | Inductance Value | **0.10 µH** (R denotes the decimal point). | --- ### 2. Technical Specifications While exact values can vary slightly by manufacturer (e.g., Signal Transformer or Bourns equivalents), typical specs for an R10 in this size include: * **Inductance:** 0.10 µH (Microhenries). * **Tolerance:** Typically ±20% (M) or ±30% (N). * **DC Resistance (DCR):** Very low (usually in the range of 5–15 mΩ) due to the low inductance value. * **Saturation Current (Isat):** The current at which inductance drops (typically high for R10 values, often > 3A). * **Operating Temperature:** Generally -40°C to +125°C. --- ### 3. Key Electronic Functions 1. **Energy Storage:** In DC-DC converters (Buck/Boost), it stores energy during the "on" cycle and releases it during the "off" cycle. 2. **Noise Filtering:** Acting as a low-pass filter, it allows DC to pass while blocking high-frequency AC ripple or EMI (Electromagnetic Interference). 3. **High-Frequency Performance:** The low inductance (0.10 µH) indicates this part is designed for **high-frequency switching power supplies** (MHz range), where large inductance is not required but rapid response is. --- ### 4. Common Applications * **Mobile Devices:** Smartphones and tablets where space is limited. * **Voltage Regulator Modules (VRM):** Providing stable power to CPUs or GPUs. * **DC/DC Converters:** Point-of-load power supplies. * **LED Drivers:** Small-scale lighting circuits. ---