The **HPC042N-R68MTR** is a high-performance, surface-mount (SMD) power inductor commonly used in DC-DC converters and power management modules. Below is a detailed technical breakdown of this electronic part. --- ## 1. Technical Specifications The part number follows a specific nomenclature used by manufacturers (typically related to high-current power inductors). | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.68 µH | | **Tolerance** | ±20% (indicated by 'M') | | **Case Size** | 0420 (Approx. 4.0 x 4.0 x 2.0 mm) | | **Shielding** | Shielded (Molded construction) | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Packaging** | Tape & Reel (indicated by 'TR') | --- ## 2. Key Characteristics * **Low DCR (DC Resistance):** Designed to minimize power loss and heat generation during operation. * **High Saturation Current:** The "Molded" construction allows it to handle high peak currents without the inductance dropping off sharply. * **Magnetic Shielding:** The metal composite powder core provides inherent shielding, reducing Electromagnetic Interference (EMI) with surrounding components. * **Soft Saturation:** Unlike ferrite core inductors, these molded types exhibit a gradual drop in inductance as current increases. --- ## 3. Physical Construction The **HPC042N** series typically utilizes a **Metal Composite Core**. 1. **Core Material:** Iron powder or a similar metal alloy pressed around the copper coil. 2. **Lead Frame:** Integrated terminals that provide high mechanical stability on the PCB. 3. **Coating:** Usually features a protective resin or coating to prevent oxidation and environmental damage. --- ## 4. Typical Applications This component is ideal for space-constrained environments requiring high efficiency: * **Voltage Regulator Modules (VRM):** Used in CPUs and GPUs for stable power delivery. * **Portable Electronics:** Smartphones, tablets, and laptops. * **DC-DC Converters:** Buck, Boost, and Buck-Boost topologies. * **Automotive Infotainment:** Providing clean power to onboard sensors and displays. --- ## 5. Equivalent Replacement Guide If this specific part is unavailable, look for components with these matching parameters: 1. **Footprint:** 4.0mm x 4.0mm x 2.0mm. 2. **Inductance:** 0.68 µH. 3. **Current Rating (Irms/Isat):** Must meet or exceed the original part's ratings (usually > 8-10A for this size).