The **CF322522-R22M** is a surface-mount (SMD) wire-wound chip inductor. It is commonly used in high-frequency circuits for filtering, decoupling, and impedance matching. Below is a breakdown of its electronic specifications and characteristics. ### 1. Part Number Breakdown Understanding the nomenclature helps identify the physical and electrical properties: | Segment | Meaning | Description | | :--- | :--- | :--- | | **CF** | Series Prefix | Wire-wound chip inductor series. | | **322522** | Dimensions | Metric size (3.2mm x 2.5mm x 2.2mm). Equivalent to **1210** imperial size. | | **R22** | Inductance Value | **0.22 µH** (R denotes the decimal point). | | **M** | Tolerance | **±20%** tolerance. | --- ### 2. Key Electrical Specifications Based on standard manufacturer data for this specific component: * **Inductance:** 0.22 µH (Microhenries). * **Test Frequency:** Typically measured at 25.2 MHz. * **Quality Factor (Q):** Usually ranges between 20 and 30 (minimum) at the test frequency, indicating low energy loss. * **Self-Resonant Frequency (SRF):** Approximately 450 MHz or higher. This is the frequency at which the component stops acting as an inductor. * **DC Resistance (DCR):** Low resistance, typically around 0.20 to 0.45 Ohms, to minimize power loss. * **Rated Current:** Generally handles between 400mA and 500mA. --- ### 3. Physical Construction The **CF322522** series utilizes a wire-wound structure rather than a multilayer process. * **Core Material:** Usually Ferrite or Ceramic. * **Termination:** Tin-plated (Sn) over nickel, suitable for reflow soldering. * **Encapsulation:** Often molded in resin or coated to protect the fine copper wire from environmental damage and mechanical stress. --- ### 4. Common Applications Due to its small footprint (1210 size) and stable inductance, it is found in: 1. **Telecommunications:** Mobile phones and base stations. 2. **Consumer Electronics:** TV tuners, GPS units, and digital cameras. 3. **Power Supplies:** Used in DC-DC converters for noise suppression. 4. **Signal Processing:** High-speed data lines to filter out electromagnetic interference (EMI). ---