The **PS120-R82M-RC** is a high-current, surface-mount (SMD) power inductor commonly used in DC-DC converters and voltage regulator modules. It belongs to a class of shielded power inductors designed for high reliability and efficiency. --- ### 1. Technical Specifications The part number follows a specific nomenclature. Below are the primary electrical and physical characteristics: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.82 µH | | **Tolerance** | ±20% (indicated by 'M') | | **DC Resistance (DCR)** | Very Low (typically < 1.0 mΩ) | | **Rated Current (Irms)** | High (typically 30A - 50A range) | | **Saturation Current (Isat)** | High (designed to avoid core saturation) | | **Operating Temp** | -40°C to +125°C | | **Construction** | Shielded, Magnetic Metal Powder Core | --- ### 2. Breakdown of the Part Number * **PS120**: Refers to the series and physical size (usually roughly 12mm x 12mm). * **R82**: Represents the inductance value. "R" acts as a decimal point, meaning **0.82 microhenries (µH)**. * **M**: Denotes the tolerance, which is **±20%**. * **RC**: Typically indicates that the part is **RoHS Compliant**. --- ### 3. Key Features * **Magnetically Shielded:** The core structure minimizes Electromagnetic Interference (EMI), making it suitable for high-density boards where components are packed closely together. * **High Saturation:** Uses specialized metal alloy powders that allow the inductor to handle high peak currents without a sharp drop in inductance. * **Low DCR:** The use of flat wire or heavy-gauge copper reduces resistive losses, which minimizes heat generation and increases power efficiency. --- ### 4. Common Applications These inductors are found in power-intensive electronic environments: 1. **Voltage Regulator Modules (VRM):** Used for CPU and GPU power supplies on motherboards. 2. **DC-DC Converters:** Buck, Boost, or Buck-Boost converters in industrial power supplies. 3. **Telecom & Networking:** High-current power distribution units. 4. **Battery Powered Systems:** Where high efficiency is critical to extending battery life. --- ### 5. Footprint (SMD) The device is designed for automated pick-and-place assembly. It usually features two large solder pads on the bottom to ensure a robust mechanical connection and low electrical resistance.