The **PI13050-R47M** is a high-current, shielded power inductor typically used in DC-DC converter applications. It is designed for high-density power supplies due to its compact size and high efficiency. --- ### 1. Part Number Breakdown Understanding the alphanumeric code helps identify the component's physical and electrical characteristics: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **PI** | Series Prefix | Power Inductor (typically molded or high-current series). | | **13050** | Case Size | Dimensions (approx. 13.5mm x 12.5mm, Height 5.0mm). | | **R47** | Inductance Value | **0.47 µH** (R acts as a decimal point). | | **M** | Tolerance | **±20%** tolerance on the inductance value. | --- ### 2. Key Technical Specifications While exact values can vary slightly by manufacturer (e.g., Cyntec, Mag.Layers, or Bourns equivalents), the standard specifications for a 13050-R47M are: * **Inductance:** 0.47 µH * **DC Resistance (DCR):** Extremely low, typically between **0.8mΩ to 1.3mΩ**. This minimizes power loss through heat. * **Saturation Current ($I_{sat}$):** High capacity, usually ranging from **40A to 60A** (the current at which inductance drops by 20-30%). * **Heating Current ($I_{rms}$):** Typically around **30A to 45A** (the current causing a 40°C temperature rise). * **Operating Temperature:** Generally **-40°C to +125°C**. --- ### 3. Construction and Features * **Magnetic Shielding:** The part is usually "molded," meaning the coil is embedded in a metal iron powder composite. This provides excellent EMI (Electromagnetic Interference) shielding. * **Soft Saturation:** Unlike ferrite core inductors that drop inductance sharply, these composite inductors have a "soft" saturation curve, making them more stable under high-load transients. * **High Frequency:** Optimized for high-frequency switching regulators (up to 5MHz). --- ### 4. Common Applications Due to its high current handling and low profile, it is commonly found in: 1. **Voltage Regulator Modules (VRM):** For CPUs and GPUs in servers and gaming PCs. 2. **Point of Load (POL) Converters:** Distributed power systems. 3. **Battery Powered Systems:** Where high efficiency is required to extend battery life. 4. **Automotive Electronics:** Infotainment and ADAS power rails.