The **47LAC-100R-R** is a specific part number typically associated with **Power Inductors**, specifically those in a surface-mount (SMD) shielded configuration. This component is commonly used in DC-DC converters and power management circuits. --- ### 1. Technical Specifications Breakdown The alphanumeric code provides specific details regarding its electrical characteristics: | Parameter | Specification | Description | | :--- | :--- | :--- | | **Inductance Value** | 10 $\mu$H | Represented by "100" (10 + 0 zeros) | | **Tolerance** | ±20% | Indicated by "M" or "L" depending on manufacturer series | | **DCR (Direct Current Resistance)** | Low | Designed to minimize heat loss | | **Mounting Type** | SMD/SMT | Surface Mount Technology | | **Shielding** | Magnetically Shielded | Reduces Electromagnetic Interference (EMI) | ### 2. Key Features * **Compact Footprint:** Designed for high-density PCB layouts. * **Magnetic Shielding:** The core is enclosed, preventing magnetic flux from interfering with nearby sensitive components. * **High Saturation Current:** It can handle high peak currents before the inductance drops significantly. * **RoHS Compliant:** The "-R" suffix usually denotes compliance with environmental regulations (Lead-free). --- ### 3. Common Applications These inductors are workhorses in modern electronics, primarily found in: 1. **Switch-Mode Power Supplies (SMPS):** Used for energy storage and filtering. 2. **DC-DC Converters:** Voltage step-up (Boost) or step-down (Buck) circuits. 3. **Consumer Electronics:** Laptops, tablets, and smartphones where space is limited. 4. **LED Drivers:** Providing stable current to high-brightness LEDs. ### 4. Comparison with Non-Shielded Inductors | Feature | Shielded (47LAC series) | Non-Shielded | | :--- | :--- | :--- | | **EMI** | Very Low | Higher | | **Size** | Slightly larger/taller | More compact | | **Cost** | Slightly higher | Lower | | **Usage** | Close to sensitive ICs | General power filtering | --- ### 5. Schematic Representation In a circuit diagram, this part is represented by the standard inductor symbol with two parallel lines above it (indicating a ferrite core and shielding). ```text L1 ----(UUUU)---- 10uH ```