The **FASD-61-R** is a specialized electronic component, typically categorized as a **Surface Mount Device (SMD) Power Inductor** or a high-current magnetic component used in power management circuits. Below is a breakdown of its technical specifications, construction, and typical applications. --- ### 1. Technical Specifications The "FASD" series is known for its compact footprint and high current handling capabilities. Here are the general electronic characteristics associated with this part: | Parameter | Typical Value / Description | | :--- | :--- | | **Inductance Range** | Usually varies by sub-model (often in the $\mu H$ range) | | **Mounting Type** | SMD (Surface Mount Device) | | **Material** | Metal Alloy Powder / Magnetic Shielded | | **Current Rating** | High Saturation Current ($I_{sat}$) | | **Operating Temp** | -40°C to +125°C (standard industrial grade) | | **DC Resistance (DCR)** | Low (optimized for high efficiency) | --- ### 2. Internal Construction The electronic performance of the FASD-61-R is defined by its physical build: * **Molded Structure:** It uses a metal alloy powder core molded directly around the copper wire. This "molded" design provides excellent magnetic shielding and reduces acoustic noise (buzzing). * **Flat Wire Technology:** Many parts in this series use flat copper wire instead of round wire to increase the cross-sectional area, which significantly lowers the **DC Resistance (DCR)**. * **Shielding:** The magnetic construction prevents EMI (Electromagnetic Interference) from leaking into surrounding components on the PCB. --- ### 3. Circuit Role and Functionality In an electronic system, the FASD-61-R serves the following primary functions: 1. **Energy Storage:** In DC-DC converters (Buck/Boost), it stores energy in its magnetic field during the "on" cycle and releases it during the "off" cycle. 2. **Filtering:** It acts as a low-pass filter to smooth out ripples in high-frequency switching power supplies. 3. **Voltage Regulation:** It helps maintain a steady output voltage in Point of Load (PoL) modules for CPUs and GPUs. --- ### 4. Common Applications Due to its high efficiency and small size, it is found in: * **Laptops and Tablets:** High-density power phases. * **Servers:** VRM (Voltage Regulator Modules). * **Automotive Electronics:** Infotainment systems and ADAS sensors. * **Telecommunications:** DC-DC converter modules. ---