The **SRP4020FA-R82M** is a high-performance, shielded power inductor manufactured by **Bourns**. It is designed specifically for high-current density applications where space is limited and electromagnetic interference (EMI) must be minimized. --- ### 1. Key Technical Specifications The part number follows a specific nomenclature that defines its physical and electrical characteristics. | Parameter | Value / Description | | :--- | :--- | | **Inductance** | 0.82 µH | | **Tolerance** | ±20% (indicated by 'M') | | **Rated Current (Irms)** | 7.5 Amps (typical) | | **Saturation Current (Isat)** | 11 Amps (typical) | | **DC Resistance (DCR)** | 11.8 mΩ (typical) / 13.8 mΩ (max) | | **Operating Temperature** | -55 °C to +155 °C | | **Package Size** | 4.1 x 4.1 x 1.9 mm (4020 footprint) | --- ### 2. Physical Construction The "SRP" series is known for its **metal alloy powder core** construction. Unlike traditional ferrite inductors, these parts are molded, which offers several advantages: * **Shielded Design:** The molded construction naturally shields the component, significantly reducing magnetic field leakage (EMI). * **High Saturation:** The metal powder core provides a "soft" saturation characteristic, meaning the inductance drops gradually rather than abruptly as current increases. * **AEC-Q200 Grade:** The "FA" suffix typically indicates that the part is automotive grade, tested for high reliability and thermal shock resistance. --- ### 3. Pinout and Footprint The device is an SMD (Surface Mount Device) with two terminals. ```text Top View _______________ | | | 82 | <-- Part Marking (R82) | | |_______________| (1) (2) ``` --- ### 4. Typical Applications Due to its high current handling and small 4x4mm footprint, it is commonly used in: * **DC/DC Converters:** Point-of-Load (POL) power supplies. * **Consumer Electronics:** Laptops, tablets, and smartphones. * **Automotive Systems:** Driver assistance systems, infotainment, and lighting. * **LED Drivers:** Providing stable current in compact lighting modules. ---