The **SIG252012-R47** is a surface-mount (SMD) power inductor commonly used in power management circuits. It is designed to handle high currents while maintaining a small footprint. --- ### 1. Key Technical Specifications The part number follows a standard industry convention for wire-wound power inductors. | Parameter | Specification | Description | | :--- | :--- | :--- | | **Inductance** | 0.47 µH | The energy storage capacity (R47 = 0.47). | | **Tolerance** | ±20% (M) | Standard variance in inductance value. | | **Package Size** | 252012 (Metric) | Dimensions: 2.5mm x 2.0mm x 1.2mm. | | **Material** | Metal Alloy / Ferrite | Typically uses a metal powder core for high saturation. | | **DC Resistance (DCR)** | Low (approx. 20-40 mΩ) | Minimizes power loss as heat. | | **Rated Current** | High (approx. 3A - 5A) | The maximum current it can handle before overheating. | --- ### 2. Physical Characteristics - **Construction:** Wire-wound on a magnetic core, often shielded to reduce Electromagnetic Interference (EMI). - **Termination:** Lead-free (RoHS compliant) solder pads located on the bottom of the component. - **Form Factor:** Low profile (1.2mm height), making it ideal for thin consumer electronics like smartphones or tablets. --- ### 3. Application Use Cases Inductors like the SIG252012-R47 are primarily used in **DC-DC Converters** (Buck, Boost, or Buck-Boost). * **Voltage Regulation:** Filtering and smoothing output current in switching power supplies. * **Mobile Devices:** Used in PMICs (Power Management ICs) for CPUs and GPUs. * **Noise Suppression:** Acting as a low-pass filter to prevent high-frequency noise from entering sensitive circuits. --- ### 4. Part Number Breakdown Most manufacturers (like Cyntec, Sunlord, or Samsung) use this nomenclature: * **SIG:** Series/Type (High-current molded power inductor). * **2520:** Length (2.5mm) and Width (2.0mm). * **12:** Maximum Height (1.2mm). * **R47:** Inductance value of 0.47 Microhenries.