The **PI13038-R68M** is a high-current, shielded power inductor typically used in DC-DC converter applications. It belongs to a category of surface-mount (SMD) components designed for high efficiency and compact power management. --- ### 1. Part Number Breakdown To understand the component, we can decode the typical nomenclature used by manufacturers (such as Mag.Layers or similar power electronic brands): | Segment | Meaning | Description | | :--- | :--- | :--- | | **PI** | Series Code | Power Inductor (usually molded/shielded type). | | **13038** | Dimensions | Indicates the physical size (approx. 13.5mm x 12.5mm x 3.8mm). | | **R68** | Inductance Value | **0.68 µH** (R denotes the decimal point). | | **M** | Tolerance | **±20%** (Industry standard for power inductors). | --- ### 2. Technical Specifications While exact specs can vary slightly by manufacturer, the standard parameters for a 13038-R68M are generally: * **Inductance:** 0.68 µH. * **DC Resistance (DCR):** Extremely low (typically between 1.5mΩ to 2.5mΩ) to minimize power loss. * **Saturation Current (Isat):** Very high, often ranging from **30A to 50A**. This is the point where inductance drops by 20-30%. * **Heat Rating Current (Irms):** The current that causes a 40°C temperature rise, usually matching or slightly below the Isat. * **Operating Temperature:** -40°C to +125°C (including self-heating). --- ### 3. Key Features * **Magnetic Shielding:** The component is usually molded with a magnetic metal powder core. This reduces Electromagnetic Interference (EMI) and prevents the magnetic field from affecting nearby components. * **High Saturation:** Unlike ferrite core inductors, these metal alloy cores have "soft" saturation characteristics, meaning they don't lose inductance abruptly when current spikes. * **Low Profile:** The "38" in the name indicates a 3.8mm height, making it suitable for slim electronic devices. --- ### 4. Typical Applications The PI13038-R68M is found in high-demand power circuits where large amounts of current must be regulated quickly: 1. **Voltage Regulator Modules (VRMs):** Found on high-end PC motherboards and GPU cards. 2. **DC-DC Converters:** Buck, Boost, or Buck-Boost converters in industrial power supplies. 3. **Telecom Infrastructure:** High-current distributed power systems. 4. **Battery Powered Systems:** Where low DCR is critical to extending battery life. --- ### 5. Equivalent Circuit Representation In a simulation (like LTSpice), the part is modeled as: ```spice * Inductor Model L1 NodeA NodeB 0.68u R_series NodeB NodeC 0.002 ; Represents DCR (2mOhm) C_para NodeA NodeC 5p ; Represents parasitic capacitance ```