The **HPC042N-R88MTR** is a high-performance, surface-mount (SMD) power inductor. It is typically used in power management circuits for high-frequency DC-DC converters, mobile devices, and telecommunications equipment. Below is a detailed breakdown of its electronic characteristics and specifications. --- ### 1. Technical Specifications The part number "R88" indicates the inductance value, and "042N" refers to the physical package size. | Parameter | Specification (Typical) | | :--- | :--- | | **Inductance** | 0.88 µH (Microhenries) | | **Tolerance** | ±20% (indicated by 'M') | | **DC Resistance (DCR)** | Low (approx. 4.0 mΩ - 6.0 mΩ) | | **Saturation Current (Isat)** | High (typically 15A - 20A) | | **Heating Current (Irms)** | High (typically 12A - 15A) | | **Case Size** | 4.0mm x 4.0mm x 2.0mm (approx.) | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Key Internal Components & Materials The "HPC" series generally utilizes a **Metal Alloy Powder** construction. * **Core Material:** Shielded construction using magnetic metal powder. Unlike traditional ferrite cores, metal powder cores offer "soft saturation" characteristics, meaning the inductance drops gradually rather than abruptly when current increases. * **Winding:** Flat or round copper wire, designed to minimize DC resistance (DCR) and maximize efficiency. * **Encapsulation:** Molded body which provides magnetic shielding to reduce Electromagnetic Interference (EMI) and protects the coil from physical damage. --- ### 3. Application Use-Cases This specific inductor is chosen for circuits where space is limited but high current handling is required: 1. **Voltage Regulator Modules (VRM):** Used in CPU/GPU power delivery. 2. **Point of Load (POL) Converters:** Converting higher battery voltages down to 1.0V - 3.3V for logic circuits. 3. **Battery Powered Devices:** Ideal for smartphones and tablets due to the low profile and high efficiency. 4. **Automotive Infotainment:** Suitable for rugged environments requiring high-temperature stability. --- ### 4. Part Number Decoder (Example) While manufacturers vary slightly, the nomenclature usually follows this logic: | Segment | Meaning | | :--- | :--- | | **HPC** | Series Name (High Power/Current) | | **042N** | Dimensions (04 x 04 x 2.0mm) | | **R88** | Inductance (R = Decimal, so 0.88 µH) | | **M** | Tolerance (M = ±20%) | | **TR** | Packaging (Tape & Reel) | ---