The **CS321613-R22K** is a specific electronic component belonging to the **Chip Inductor** category. It is a surface-mount device (SMD) commonly used in high-frequency circuits for signal conditioning and noise suppression. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the physical and electrical characteristics: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **CS** | Series Type | Multi-layer Chip Inductor (Standard) | | **321613** | Case Size (Metric) | 3.2mm x 1.6mm x 1.3mm (corresponds to **1206** Imperial) | | **R22** | Inductance Value | R denotes decimal; 0.22 Microhenries ($\mu H$) | | **K** | Tolerance | $\pm 10\%$ | --- ### 2. Key Technical Specifications While exact values can vary slightly by manufacturer (e.g., Bourns, Taiyo Yuden), the standard parameters for a 0.22$\mu H$ 1206 inductor are generally: * **Inductance:** 0.22 $\mu H$ * **Tolerance:** $\pm 10\%$ * **Test Frequency:** Typically 25 MHz * **Quality Factor (Q):** Minimum 20–30 (at test frequency) * **Self-Resonant Frequency (SRF):** Approximately 250 MHz to 450 MHz * **DC Resistance (DCR):** Max ~0.40 - 0.50 $\Omega$ * **Rated Current:** Usually between 200mA and 300mA --- ### 3. Construction and Material * **Technology:** Multi-layer ferrite technology. Unlike wire-wound inductors, these are made by layering ferrite paste and conductive electrode paste. * **Termination:** Typically Nickel (Ni) barrier with a Tin (Sn) plating to ensure high solderability and prevent "leaching" during the assembly process. * **Magnetic Shielding:** The multi-layer structure provides a closed magnetic circuit, resulting in low EMI (Electromagnetic Interference) and high-density mounting. --- ### 4. Common Applications Due to its 1206 form factor and mid-range inductance, the CS321613-R22K is found in: 1. **RF Circuits:** Matching networks and high-frequency filtering. 2. **Power Decoupling:** Removing high-frequency noise from DC power lines in mobile phones and laptops. 3. **Signal Isolation:** Preventing crosstalk between different stages of a circuit. ---