The **SWC108I-R33GA** is a high-performance surface-mount (SMD) power inductor, commonly used in automotive and industrial power management circuits. It is part of a series known for high current handling and low core losses. ### Technical Specifications The following table outlines the primary electrical and physical characteristics of this component: | Parameter | Value / Specification | | :--- | :--- | | **Inductance** | 0.33 µH (R33) | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | ~0.85 mΩ (Typical) | | **Saturation Current (Isat)** | ~40.0 A | | **Heat Rating Current (Irms)** | ~30.0 A | | **Operating Temperature** | -40°C to +125°C (Includes self-heating) | | **Package Size** | 10.8 x 10.0 x 8.0 mm (Approx.) | | **Construction** | Shielded Magnetic Structure | --- ### Key Features 1. **High Saturation Current:** The "R33" designation indicates a low inductance of 0.33 microhenries, which allows the part to handle very high peak currents without the magnetic core saturating. 2. **Magnetic Shielding:** The component is shielded to minimize Electromagnetic Interference (EMI), making it suitable for densely packed PCBs and noise-sensitive environments. 3. **Low DCR:** The use of flat wire or heavy-gauge copper leads to ultra-low DC resistance, which minimizes power loss and heat generation during operation. 4. **Stability:** Designed to maintain stable inductance across a wide range of temperatures and frequencies. --- ### Common Applications The SWC108I-R33GA is typically found in high-efficiency power stages, including: * **DC-DC Converters:** Used as the main energy storage element in Buck, Boost, or Buck-Boost regulators. * **Voltage Regulator Modules (VRM):** Commonly used in CPU or GPU power delivery systems due to high current requirements. * **Automotive Electronics:** Used in Advanced Driver Assistance Systems (ADAS) and infotainment power supplies. * **Industrial Power Supplies:** High-current point-of-load (POL) converters. --- ### Internal Structure Code Breakdown * **SWC:** Series identifier (typically Shielded Wirewound Component). * **108:** Physical dimensions (approx. 10mm width/length, 8mm height). * **I:** Grade or Material indicator (often Industrial or Automotive grade). * **R33:** Inductance value ($0.33 \mu H$). * **GA:** Package/Tolerance/Taping specification.