## Technical Breakdown of FL321611-R82K The **FL321611-R82K** is a passive electronic component, specifically a **Surface Mount Device (SMD) Multilayer Chip Inductor**. These components are widely used in high-frequency circuits for signal conditioning and noise suppression. --- ### 1. Part Number Deciphering Manufacturers use specific codes to define the physical and electrical attributes of the part: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **FL** | Series Type | Typically denotes a Multilayer Ferrite Chip Inductor. | | **321611** | Case Size (Metric) | Dimensions: 3.2mm x 1.6mm x 1.1mm (corresponds to **EIA 1206**). | | **R82** | Inductance Value | "R" acts as a decimal point. **0.82 µH** (Microhenries). | | **K** | Tolerance | Indicates a **±10%** tolerance range. | --- ### 2. Key Electrical Specifications Based on standard industry data for the 3216 (1206) R82K series: * **Inductance:** 0.82 µH. * **Tolerance:** ±10%. * **DC Resistance (DCR):** Usually ranges between 0.30Ω and 0.60Ω (Max). * **Rated Current:** Typically between 150mA and 300mA. * **Self-Resonant Frequency (SRF):** Generally around 80 MHz to 110 MHz. * **Operating Temperature:** -40°C to +85°C (standard) or +125°C (extended). --- ### 3. Construction and Material The "Multilayer" designation refers to how the component is built: * **Ferrite Body:** The core is made of a ferrite ceramic material which provides high magnetic permeability. * **Internal Electrodes:** Silver (Ag) or Palladium-Silver (Pd-Ag) layers are printed and stacked to create the inductor coil within the ceramic body. * **Terminations:** Usually composed of a Nickel (Ni) barrier layer with a Tin (Sn) plating to ensure good solderability and prevent leaching. --- ### 4. Common Applications Due to its 1206 form factor and 0.82 µH inductance, it is commonly found in: 1. **EMI Suppression:** Filtering high-frequency noise in power lines. 2. **RF Circuits:** Used in impedance matching or as a choke in wireless communication devices. 3. **Signal Decoupling:** Preventing interference between different stages of a circuit (e.g., between an analog and digital plane). 4. **Portable Electronics:** Used in tablets, smartphones, and laptops where space is at a premium. --- ### 5. Equivalent Comparison (SMT Sizes) | EIA Code | Metric Code | Dimensions (L x W) | | :--- | :--- | :--- | | 0603 | 1608 | 1.6 x 0.8 mm | | 0805 | 2012 | 2.0 x 1.2 mm | | **1206** | **3216** | **3.2 x 1.6 mm** | ---