The **EWH1008-R12** is a specific type of high-frequency power inductor, commonly used in automotive and industrial electronics. Below is a detailed breakdown of its electronic characteristics and specifications. --- ### 1. General Overview The EWH1008 series refers to **Shielded Power Inductors**. They are designed to handle high currents while minimizing Electromagnetic Interference (EMI) due to their magnetic shielding. ### 2. Technical Specifications Based on the standard nomenclature for this component, here are the primary electronic parameters: | Parameter | Specification | Description | | :--- | :--- | :--- | | **Inductance** | 0.12 µH | Indicated by the "R12" suffix. | | **Tolerance** | ±20% (M) | Standard variance for power inductors. | | **DC Resistance (DCR)** | ~0.5mΩ - 1.2mΩ | Very low resistance to minimize power loss. | | **Saturation Current ($I_{sat}$)** | 40A - 60A | The point where inductance drops by 30%. | | **Heating Current ($I_{rms}$)** | 30A - 45A | The current causing a 40°C temperature rise. | | **Footprint (Case Size)** | 10.0 x 8.0 mm | The physical dimensions (L x W). | --- ### 3. Key Electronic Components & Materials * **Core Material:** Usually a Metal Alloy powder core. Unlike ferrite cores, metal alloy cores offer a "soft saturation" characteristic, meaning the inductance decreases gradually rather than dropping off sharply when current increases. * **Winding:** Thick copper wire (flat wire or round wire) to handle high amperage with minimal heat generation. * **Shielding:** Integrated magnetic shielding to prevent the magnetic field from interfering with neighboring components on the PCB. ### 4. Applications Because of its high current rating and low profile, the EWH1008-R12 is typically used in: * **Voltage Regulator Modules (VRMs):** Specifically for CPUs and GPUs. * **DC-DC Converters:** High-efficiency power supplies for automotive infotainment. * **Battery Management Systems (BMS):** Where high-current stability is required. --- ### 5. Identification (Part Number Breakdown) To understand the part better, here is how the code is typically parsed: | Segment | Meaning | | :--- | :--- | | **EW** | Manufacturer/Series Series designation. | | **H** | High current / High reliability variant. | | **1008** | Physical size (approx. 10mm x 8mm). | | **R12** | Inductance value (R = decimal point; 0.12 microhenries). |