### Analysis of the CM252016-R47M Electronic Component The **CM252016-R47M** is a surface-mount (SMD) wire-wound chip inductor. It is commonly used in high-frequency circuits, telecommunications, and consumer electronics for filtering and impedance matching. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the physical and electrical characteristics of the component: | Code | Segment | Meaning | | :--- | :--- | :--- | | **CM** | Series | Wire-wound Chip Inductor series | | **252016** | Dimensions | Metric size: 2.5mm x 2.0mm x 1.6mm (EIA 1008) | | **R47** | Inductance | **0.47 µH** (R acts as a decimal point) | | **M** | Tolerance | **±20%** | --- ### 2. Technical Specifications Below are the typical electrical parameters for this specific part: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.47 µH | | **Tolerance** | ±20% | | **Quality Factor (Q min)** | 25 - 30 (at test frequency) | | **Self-Resonant Frequency (SRF)** | ~350 MHz to 450 MHz | | **DC Resistance (DCR Max)** | 0.40 - 0.60 Ω | | **Rated Current (Idc)** | ~450 mA | | **Operating Temperature** | -40°C to +125°C | --- ### 3. Physical Construction The "252016" refers to the package size, often categorized as **EIA 1008**. * **Core Material:** Usually ferrite or ceramic depending on the specific application (ferrite is more common for R47 values to achieve higher inductance in a small space). * **Termination:** Tin-plated (Sn) over nickel (Ni) barrier to prevent leaching during soldering. * **Encapsulation:** Often coated with an epoxy resin to protect the fine copper wire from mechanical stress and environmental factors. --- ### 4. Common Applications Due to its small footprint and moderate current handling, the CM252016-R47M is found in: 1. **Mobile Devices:** Power management modules and signal filtering. 2. **DC-DC Converters:** Small-scale voltage regulation. 3. **RF Circuits:** Impedance matching in wireless communication modules. 4. **Audio/Video:** Noise suppression in signal lines. ---