The **1008F-R56K** is a specific part number for a **Surface Mount (SMD) Wire-wound Inductor**. These components are widely used in Radio Frequency (RF) circuits for filtering, decoupling, and impedance matching. Below is a detailed breakdown of its specifications based on the standard alphanumeric coding system for electronic components. ### 1. Part Number Breakdown | Segment | Code | Meaning | | :--- | :--- | :--- | | **Series/Size** | **1008** | Physical dimensions: 0.10 x 0.08 inches (approx. 2.5 x 2.0 mm). | | **Tolerance** | **F** | $\pm$ 1% (High precision). | | **Inductance** | **R56** | 0.56 Microhenries ($\mu$H) or 560 Nanhenries (nH). | | **Core Material** | **K** | Often indicates a Ceramic or Ferrite core (varies slightly by manufacturer). | --- ### 2. Technical Specifications Inductors like the 1008F-R56K are characterized by several key electrical parameters: * **Inductance Value:** 560 nH. * **Tolerance:** $\pm$ 1%. This is considered a high-precision part, making it suitable for frequency-sensitive applications. * **Quality Factor (Q):** Typically high in wire-wound inductors, allowing for sharp resonance in filter circuits. * **Self-Resonant Frequency (SRF):** Usually in the range of 300 MHz to 600 MHz for this value. * **DC Resistance (DCR):** The internal resistance of the copper wire; usually measured in Ohms ($\Omega$). * **Rated Current:** The maximum amount of DC current the part can handle before overheating or saturating. --- ### 3. Construction & Material * **Wire-wound Technology:** This part consists of a copper wire wrapped around a ceramic or ferrite core. Wire-wound construction offers much lower DC resistance and higher current handling compared to multilayer chips. * **Encapsulation:** These are often molded or coated with epoxy to protect the fine wire from mechanical damage and moisture. --- ### 4. Common Applications Because of the "F" (1%) tolerance and the 1008 size, this part is typically found in: 1. **RF Transceivers:** Used in the matching networks of Wi-Fi, Bluetooth, and cellular modules. 2. **Filters:** Low-pass, high-pass, and band-pass filters in communication equipment. 3. **Signal Conditioning:** Decoupling high-frequency noise from power lines in sensitive analog circuits. ---