The **LSW-1008-R22M-B** is a Surface Mount Device (SMD) wire-wound chip inductor. It is commonly used in high-frequency circuits for filtering, impedance matching, and energy storage. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the physical and electrical characteristics of the component: | Segment | Meaning | Description | | :--- | :--- | :--- | | **LSW** | Series Code | Wire-wound chip inductor series. | | **1008** | Case Size | Dimensions: 0.10 x 0.08 inches (approx. 2.5 x 2.0 mm). | | **R22** | Inductance Value | R denotes the decimal point. **0.22 µH** (220 nH). | | **M** | Tolerance | Indicates **±20%** tolerance on inductance. | | **B** | Packaging/Special | Often refers to Bulk or a specific plating/termination style. | --- ### 2. Key Technical Specifications Based on standard industry data for the 1008 wire-wound series, the typical performance parameters are as follows: * **Inductance:** 0.22 µH (220 nH) * **Tolerance:** ±20% (M) * **Case Size:** 2520 (Metric) / 1008 (Imperial) * **DC Resistance (DCR):** Usually low (typically < 0.50 Ω) to minimize power loss. * **Rated Current:** Typically ranges between 400mA to 800mA (depending on heat rise). * **Self-Resonant Frequency (SRF):** High frequency (often > 400 MHz), making it suitable for RF applications. --- ### 3. Construction and Material * **Core Material:** Usually a ceramic or ferrite core. Ceramic cores are preferred for high-frequency stability, while ferrite cores offer higher inductance in smaller packages. * **Winding:** Fine copper wire wound around the core, providing a higher Q-factor (quality factor) compared to multilayer inductors. * **Termination:** High-quality soldering pads (often Tin/Silver/Copper) for reflow soldering. --- ### 4. Common Applications This part is typically found in the following electronic circuits: 1. **RF Circuits:** Used for impedance matching in wireless communication modules (Wi-Fi, Bluetooth). 2. **Power Management:** Acting as a small power inductor in DC-DC converters for mobile devices. 3. **Signal Filtering:** Removing high-frequency noise from signal lines. 4. **Decoupling:** Preventing high-frequency interference from affecting sensitive integrated circuits (ICs).