The **8LCS-5055-R** is a specific surface-mount (SMD) power inductor commonly used in DC-DC converters and power management circuits. It is designed to handle high currents while maintaining a compact footprint. --- ### 1. Key Technical Specifications Below is a breakdown of the typical parameters for this component: | Parameter | Value/Description | | :--- | :--- | | **Component Type** | Shielded Power Inductor | | **Inductance** | 5.5 µH (Standard for this series) | | **Case Size** | Approx. 8.0 x 8.0 x 5.5 mm | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Shielding** | Magnetic Shielded (Reduces EMI) | | **RoHS Status** | Compliant (R suffix often denotes RoHS) | --- ### 2. Physical Construction The "8LCS" series is characterized by several structural features: * **Magnetic Shielding:** The coil is encased in a magnetic powder or ferrite core. This prevents the magnetic fields generated by the inductor from interfering with nearby sensitive components on the PCB. * **Base Material:** Usually constructed with a ferrite drum core and a ring core, or a molded metal powder base. * **Terminals:** Features flat, solderable leads on the bottom of the component for high-strength mechanical bonding and low electrical resistance. --- ### 3. Common Applications This part is typically found in high-efficiency power stages where space is limited but power requirements are high: 1. **Buck/Boost Converters:** Used as an energy storage element to step voltage up or down. 2. **Laptops & Tablets:** Integrated into the CPU/GPU power rails. 3. **Industrial Controls:** Used in 12V or 24V bus power supplies. 4. **LED Drivers:** Provides stable current filtering for high-brightness LEDs. --- ### 4. Part Number Breakdown (Typical) While manufacturers vary slightly, the code usually breaks down as follows: | Code Segment | Meaning | | :--- | :--- | | **8LCS** | Series Series identifier (Low Core Loss / Shielded) | | **5055** | Dimensions (Width/Length approx 5.0-8.0mm, Height 5.5mm) | | **R** | RoHS Compliant / Lead-Free | --- ### 5. Electrical Behavior When using the 8LCS-5055-R, engineers must consider: * **Saturation Current ($I_{sat}$):** The point where inductance drops by a specific percentage (usually 30%). * **Heating Current ($I_{rms}$):** The current that causes the component temperature to rise by 40°C. * **DCR (DC Resistance):** Lower DCR in this part helps minimize heat dissipation and increases overall efficiency.