## Analysis of C252012WB-R47 The **C252012WB-R47** is a surface-mount (SMD) wire-wound chip inductor. Based on its nomenclature, it belongs to a category of high-frequency components typically used in telecommunications and power management circuits. --- ### 1. Part Number Breakdown Understanding the alphanumeric code reveals the physical and electrical characteristics of the component: | Code Segment | Description | Meaning | | :--- | :--- | :--- | | **C** | Component Type | Chip Inductor | | **252012** | Dimensions (Metric) | 2.5mm x 2.0mm x 1.2mm | | **WB** | Series/Construction | Wire-wound, Bonded/High Q type | | **R47** | Inductance Value | 0.47 µH (microhenries) | --- ### 2. Electrical Specifications While specific datasheets vary by manufacturer (such as Taiyo Yuden or Bourns), a standard R47 wire-wound inductor in this footprint typically follows these specifications: * **Inductance:** 0.47 µH * **Tolerance:** Usually ±10% (K) or ±20% (M) * **DC Resistance (DCR):** Low (typically < 0.20 Ω) to minimize power loss. * **Rated Current:** High relative to size (often between 500mA to 1.2A). * **Self-Resonant Frequency (SRF):** High frequency (typically > 200 MHz), making it suitable for RF filtering. --- ### 3. Key Physical Features 1. **Wire-Wound Construction:** Unlike multilayer inductors, these use a copper wire wound around a ceramic or ferrite core. This allows for higher **Q-factors** (Quality factor) and higher current carrying capacity. 2. **SMD Package:** The 2520 (1008 in Imperial) footprint is designed for automated "pick and place" assembly. 3. **Encapsulation:** Often features a resin coating or molded body to protect the wire windings from environmental factors and mechanical stress. --- ### 4. Typical Applications The C252012WB-R47 is commonly found in: * **DC-DC Converters:** Used in power supply modules for smartphones and tablets. * **RF Circuits:** Matching networks and decoupling in wireless communication modules (Wi-Fi, Bluetooth). * **Signal Filtering:** Noise suppression in high-speed data lines.