The **LSML-321611-R39M-B** is a surface-mount (SMD) multilayer chip inductor. These components are primarily used for high-frequency filtering and EMI suppression in compact electronic devices. Below is a detailed breakdown of its specifications and physical characteristics. ### 1. Part Number Breakdown Understanding the alphanumeric code reveals the specific parameters of the inductor: | Segment | Value | Meaning | | :--- | :--- | :--- | | **LSML** | Series | Multilayer Chip Inductor (Standard Type) | | **321611** | Size | Metric Dimensions: 3.2mm x 1.6mm x 1.1mm (EIA 1206) | | **R39** | Inductance | **0.39 µH** (R denotes decimal point) | | **M** | Tolerance | **±20%** | | **B** | Packaging | Bulk or specific internal factory code | --- ### 2. Technical Specifications Typical values for this class of multilayer inductor include: * **Inductance:** 0.39 µH (Microhenries) * **Test Frequency:** Usually 25 MHz * **DC Resistance (DCR):** Low resistance to minimize power loss (typically < 0.50 Ω). * **Rated Current:** The maximum current it can handle before overheating (typically between 150mA to 300mA for this size). * **Self-Resonant Frequency (SRF):** High frequency (often > 150 MHz) to ensure stable operation in RF circuits. --- ### 3. Construction and Features * **Multilayer Technology:** Unlike wire-wound inductors, these are made by layering ceramic materials and conductive paste. This results in a monolithic, solid structure that is highly reliable. * **Magnetic Shielding:** The multilayer structure provides a closed magnetic circuit, which minimizes crosstalk between components on a crowded PCB. * **Compact Form Factor:** The **1206 (3216 Metric)** package is a standard size, making it compatible with high-speed automated pick-and-place assembly. --- ### 4. Common Applications This specific inductor is generally found in: 1. **Mobile Electronics:** Smartphones, tablets, and wearables. 2. **Filtering:** Used in LC circuits to filter high-frequency noise in power lines. 3. **Signal Conditioning:** Decoupling and impedance matching in high-speed communication modules. ---