The **HPC042N-R22MTR** is a high-performance **Surface Mount (SMD) Power Inductor**, commonly used in DC-DC converters and high-current power supplies. It is designed to handle high frequencies and high current loads with minimal energy loss. --- ## 1. Technical Specifications Below are the primary electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.22 µH | | **Tolerance** | ±20% (indicated by the 'M') | | **DC Resistance (DCR)** | ~2.5 mΩ (Max) | | **Saturation Current (Isat)** | ~25A - 30A (varies by specific series version) | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 0420 (approx. 4.0 x 4.0 x 2.0 mm) | | **Material Core** | Metal Alloy / Carbonyl Powder | --- ## 2. Part Number Breakdown Understanding the nomenclature helps in identifying the component's capabilities: * **HPC**: Series identifier (High Power/High Current Inductor). * **042**: Physical size (04 indicates length/width ~4mm; 2 indicates height ~2mm). * **N**: Material or internal design code. * **R22**: The inductance value. "R" acts as a decimal point, so $0.22 \mu H$. * **M**: Tolerance code (M = ±20%). * **TR**: Packaging format (Tape and Reel). --- ## 3. Key Electronic Features * **Metal Alloy Construction:** Unlike traditional ferrite inductors, these use a molded metal powder. This allows for "soft saturation," meaning the inductance doesn't drop off instantly when current spikes. * **Low DCR:** The very low DC resistance minimizes power loss and heat generation, which is critical for battery-powered devices. * **Magnetic Shielding:** The molded structure naturally shields the component, reducing Electromagnetic Interference (EMI) with neighboring components on the PCB. * **High Frequency Performance:** Optimized for switching frequencies ranging from 1MHz to 5MHz. --- ## 4. Common Applications These inductors are typically found in the power stages of modern electronics: * **Voltage Regulator Modules (VRMs):** Used in laptops and desktops to step down voltage for CPUs/GPUs. * **Smartphones:** Power management for high-speed processors. * **DC-DC Converters:** Point-of-load (POL) converters where space is limited but current demand is high.