The **PCXA402-R10M** is a high-performance **Molded Power Inductor**, typically used in DC-DC converter applications and power management modules. These components are designed to handle high current while maintaining a compact footprint and low electromagnetic interference (EMI). --- ### 1. Key Technical Specifications Based on the standard nomenclature for this series of power inductors, here are the technical characteristics: | Property | Value (Typical) | Description | | :--- | :--- | :--- | | **Inductance** | 0.10 µH | The "R10" indicates 0.10 microhenries. | | **Tolerance** | ±20% | Indicated by the "M" suffix. | | **Current Rating** | High (20A - 40A+) | Specific to the 402 package size; designed for high saturation. | | **Material** | Metal Alloy / Carbonyl | Molded construction for superior magnetic shielding. | | **Mounting Type** | SMD/SMT | Surface Mount Device for automated PCB assembly. | --- ### 2. Physical Construction and Features The "Molded" design of the PCXA402-R10M offers several advantages over traditional wire-wound inductors: * **Shielded Construction:** The inductor coil is encapsulated in a metallic magnetic powder. This results in very low magnetic flux leakage (EMI), protecting sensitive nearby components. * **Soft Saturation:** Unlike ferrite cores that drop inductance sharply when current limits are exceeded, these metal alloy cores have a "soft" saturation curve, making the power supply more stable under transient loads. * **Compact 402 Size:** The "402" usually refers to the metric or imperial dimensions (often roughly 4.0 x 4.0 mm). It provides a high power-to-size ratio. --- ### 3. Common Applications The PCXA402-R10M is commonly found in the following electronic circuits: 1. **Voltage Regulator Modules (VRM):** Used in CPU/GPU power delivery on motherboards. 2. **Point of Load (POL) Converters:** Decentralized power conversion for FPGAs and ASICs. 3. **Battery Powered Devices:** High efficiency and low DCR (Direct Current Resistance) help extend battery life in laptops and tablets. 4. **DC-DC Buck Converters:** Used as the energy storage element in step-down switching regulators. --- ### 4. Part Number Breakdown * **PCXA:** Series prefix (typically High-Current Molded Inductor series). * **402:** Physical dimensions/Case size. * **R10:** Inductance value ($0.10 \mu H$). * **M:** Tolerance ($\pm 20\%$).