The **47LAC-151B-R** is a specific electronic component, primarily identified as a **Power Inductor**. It is designed for use in power management circuits, specifically within DC-DC converters and voltage regulator modules. --- ### 1. Technical Specifications The part number follows a standard industry naming convention. Below are the typical specifications for this component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 150 µH (Microhenries) | | **Tolerance** | ±20% (Typical for 'M' or standard series) | | **Core Material** | Ferrite | | **Mounting Type** | SMD (Surface Mount Device) | | **Shielding** | Shielded (Magnetic shielding to prevent EMI) | | **RoHS Compliant** | Yes (Indicated by the '-R' suffix) | --- ### 2. Breakdown of the Part Number Understanding the alphanumeric code helps in identifying the physical and electrical characteristics: * **47LAC**: Refers to the series or the physical dimensions/form factor of the inductor. * **151**: The inductance value. * The first two digits (**15**) are significant figures. * The third digit (**1**) is the multiplier ($10^1$). * Calculation: $15 \times 10^1 = 150 \mu H$. * **B**: Often denotes the tolerance or a specific packaging/case style. * **-R**: Generally indicates **RoHS Compliance** (Restriction of Hazardous Substances). --- ### 3. Key Functions & Applications Inductors like the 47LAC-151B-R serve three primary roles in an electronic circuit: 1. **Energy Storage:** They store energy in a magnetic field when current flows through them, which is essential for switching power supplies. 2. **Filtering:** They block high-frequency AC noise while allowing DC to pass, acting as a "choke." 3. **Voltage Regulation:** They work alongside capacitors to smooth out output voltage in buck or boost converters. **Common Applications:** * Laptop and Desktop motherboards. * LCD/LED TV power boards. * DC-DC Converters. * Network hubs and routers. --- ### 4. Circuit Symbol and Implementation In a schematic diagram, this component is represented as a series of curved bumps or a solid rectangle. ```cpp // Schematic representation [Line] --((((-- [Line] L1 (150uH) ``` ---