The **AC20-R82K-RC** is a specific electronic component belonging to the **inductor** family, manufactured by Allied Components International. It is an axial-leaded, conformal coated inductor designed for general-purpose filtering and RF applications. --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its electrical properties: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.82 µH (Microhenries) | | **Tolerance** | ±10% (Indicated by the "K") | | **Current Rating (IDC)** | ~700 mA to 900 mA (Typical for this size) | | **DC Resistance (DCR)** | ~0.15 Ω to 0.25 Ω Max | | **Self-Resonant Frequency** | ~140 MHz | | **Package Type** | Axial Leaded (Through-hole) | | **Coating** | Epoxy Resin (Conformal Coated) | --- ### 2. Part Number Breakdown Understanding the suffix and prefix helps in identifying the component's standards: * **AC20**: Series designation (typically refers to the physical size and core material). * **R82**: The value code. The "R" acts as a decimal point, resulting in **0.82**. * **K**: Tolerance code. K represents **±10%**. * **RC**: Stands for **RoHS Compliant**, meaning it is free from lead and other hazardous substances. --- ### 3. Key Applications Because of its high resonant frequency and axial form factor, this part is commonly used in: 1. **RF Decoupling:** Preventing high-frequency noise from entering sensitive circuits. 2. **Signal Filtering:** Used in low-pass filters to smooth out signals. 3. **Power Supplies:** Acting as a small choke in DC-DC converters to reduce ripple. 4. **Consumer Electronics:** Found in televisions, radios, and communication equipment. --- ### 4. Physical Construction The inductor consists of a wire coil wound around a ferrite or phenolic core. The entire assembly is dipped in a protective **epoxy resin** (usually green or blue). * **Mounting:** Through-hole technology (THT). * **Durability:** The conformal coating provides moisture resistance and mechanical stability for the copper windings.