## Technical Overview of CW252016-R47J The **CW252016-R47J** is a surface-mount (SMD) wire-wound chip inductor. It is part of the CW252016 series, commonly manufactured by companies like **Bourns** or **Fastron**. This specific part is designed for high-frequency applications where high Q (quality factor) and stable inductance are required. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the physical and electrical characteristics: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **CW** | Product Type | Chip Wire-wound Inductor | | **252016** | Size (Metric/EIA) | 2.5mm x 2.0mm x 1.6mm (EIA 1008) | | **R47** | Inductance Value | 0.47 µH (470 nH) | | **J** | Tolerance | ±5% | --- ### 2. Key Electrical Specifications Below are the typical technical parameters for this specific component: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.47 µH | | **Tolerance** | ±5% | | **Quality Factor (Q) Min.** | 25 (at 25.2 MHz) | | **Self-Resonant Frequency (SRF)** | ~375 MHz | | **DC Resistance (DCR) Max.** | 0.95 Ω | | **Rated Current (Idc)** | 450 mA | | **Operating Temperature** | -40°C to +125°C | --- ### 3. Construction and Features * **Wire-wound Core:** Features a ceramic core with a copper wire winding. This construction provides significantly higher **Q factors** and current handling capabilities compared to multilayer ferrites. * **Package Size:** The **1008 (EIA)** or **2520 (Metric)** footprint is a standard size for RF modules and mobile devices. * **Stability:** The ceramic core ensures excellent thermal stability and a high SRF, making it suitable for high-frequency filtering. --- ### 4. Typical Applications * **RF Communications:** Used in impedance matching circuits for cellular phones, Wi-Fi modules, and Bluetooth devices. * **Signal Filtering:** High-frequency low-pass or band-pass filters. * **Decoupling:** Filtering high-frequency noise in power supply lines for sensitive analog components.