The **SCIHP1338-R56M** is a high-current, surface-mount (SMD) power inductor commonly used in DC-DC converter applications. It belongs to a class of "molded" inductors known for their durability and excellent magnetic shielding. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the component's physical and electrical characteristics: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **SCIHP** | Series Name | High-current, shielded power inductor series. | | **1338** | Case Size | Dimensions (approx. 13.5mm x 12.6mm x 3.5mm). | | **R56** | Inductance | **0.56 µH** (R denotes the decimal point). | | **M** | Tolerance | **±20%** tolerance on the inductance value. | --- ### 2. Key Technical Specifications Based on standard industry data for the 1338 size at 0.56µH: * **Inductance:** 0.56 µH * **DC Resistance (DCR):** Extremely low (typically < 2.0 mΩ), which minimizes power loss and heat generation. * **Saturation Current ($I_{sat}$):** Typically ranges from **30A to 50A**. This is the current at which inductance drops by a specific percentage (usually 20-30%). * **Heating Current ($I_{rms}$):** The continuous current that causes a 40°C temperature rise (typically **25A to 35A**). * **Operating Temperature:** Generally rated for **-55°C to +125°C**. --- ### 3. Structural Features The SCIHP series utilizes a specific construction style: 1. **Magnetic Shielding:** The coil is encapsulated in a metallic powder composite. This reduces EMI (Electromagnetic Interference) and prevents the magnetic field from interfering with nearby components. 2. **Molded Construction:** Unlike traditional wire-wound inductors with open cores, the molded body provides high resistance to mechanical shock and vibration. 3. **Lead-Free/RoHS:** Compliant with modern environmental standards for manufacturing. --- ### 4. Common Applications Due to its high current handling and low profile, this part is found in: * **Voltage Regulator Modules (VRM):** For high-end CPUs and GPUs. * **DC-DC Converters:** Point-of-load (POL) power supplies. * **Battery Powered Systems:** Where high efficiency (low DCR) is critical to extend battery life. * **Servers and Networking:** High-current power distribution rails.