The **FSE-165-R** is a high-performance, shielded power inductor typically manufactured by companies like **Sumida** (often part of their FSE series). These components are critical in power management circuits, specifically designed to handle high currents while maintaining a compact footprint. --- ### 1. Key Technical Specifications The electrical characteristics define how the part behaves under load. Below are the typical parameters for this series: | Parameter | Typical Value / Description | | :--- | :--- | | **Inductance** | 1.6 µH (implied by "165" code, though exact values vary by sub-series) | | **Current Rating (Isat)** | High Saturation Current (typically >10A depending on size) | | **DCR (DC Resistance)** | Low resistance to minimize power loss | | **Shielding** | Magnetically Shielded (reduces EMI) | | **Operating Temp** | -40°C to +125°C | --- ### 2. Core Electronic Components & Construction The FSE-165-R is not a single "part" but an assembly of several electronic materials: * **Winding:** Utilizes high-conductivity copper wire. The "R" suffix often denotes **RoHS compliance** (lead-free) or specific reel packaging. * **Magnetic Core:** Usually composed of a ferrite or metal composite powder. This core concentrates the magnetic field, allowing for higher inductance in a smaller volume. * **Shielding:** The construction includes a magnetic shield that encloses the coil. This prevents the magnetic flux from interfering with nearby sensitive components (like CPUs or RF modules). * **Terminations:** Solderable pads designed for **SMT (Surface Mount Technology)**, ensuring a robust mechanical and electrical connection to the PCB. --- ### 3. Application Use Cases You will primarily find the FSE-165-R in the following circuits: 1. **DC-DC Converters:** Acts as the energy storage element in buck (step-down) or boost (step-up) regulators. 2. **Point of Load (POL) Supplies:** Used in high-speed computing environments where clean, stable power is required for processors. 3. **Noise Filtering:** Helps smooth out voltage ripples in power lines to prevent electronic "noise" from affecting performance. --- ### 4. Circuit Symbol and Implementation In a schematic, this part is represented by the standard inductor symbol. ```spice * Example of FSE-165-R in a Buck Converter stage L1 Input_Node Output_Node 1.6uH ; The Inductor C1 Output_Node GND 100uF ; Output Filter Capacitor ```