The **CV201210-R22K** is a surface-mount chip inductor manufactured by Bourns. It is part of the CV series, which consists of multilayer chip inductors designed for high-frequency signal processing and filtering. ### Technical Specifications The following table outlines the key electrical and physical parameters of this component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.22 µH (Microhenries) | | **Tolerance** | ±10% (Indicated by 'K') | | **Case Size (EIA/Metric)** | 0805 / 2012 | | **Dimensions** | 2.0 mm x 1.25 mm x 1.0 mm | | **Rated Current** | 250 mA (Maximum) | | **DC Resistance (DCR)** | 0.50 Ω (Maximum) | | **Self-Resonant Frequency** | 250 MHz (Minimum) | | **Q-Factor (Quality)** | 20 (Minimum at 25 MHz) | | **Operating Temperature** | -55°C to +125°C | --- ### Component Breakdown #### 1. Part Number Deciphering * **CV**: Series name (Multilayer Chip Inductor). * **2012**: Physical dimensions in millimeters (2.0mm x 1.25mm). * **10**: Height code (approx. 1.0mm). * **R22**: Inductance value (R represents the decimal point; R22 = 0.22 µH). * **K**: Tolerance code (±10%). #### 2. Construction and Technology * **Multilayer Structure:** Unlike wire-wound inductors, this part is created by layering ceramic material and conductive paste. This results in a monolithic, shielded structure that reduces electromagnetic interference (EMI). * **Magnetic Shielding:** The multilayer design inherently provides a closed magnetic circuit, preventing cross-talk between components on densely packed PCBs. #### 3. Typical Applications * **Filtering:** Used in low-pass filters to remove noise from high-frequency lines. * **Mobile Electronics:** Ideal for cellular phones, tablets, and portable devices due to its small 0805 footprint. * **Signal Conditioning:** Commonly found in Bluetooth modules, Wi-Fi circuits, and RF communication blocks. --- ### Comparison with Wire-wound Inductors Compared to wire-wound alternatives of the same inductance: * **Pros:** Smaller size, better magnetic shielding, and lower cost. * **Cons:** Lower Q-factor and lower current carrying capacity (SRF is usually lower).