The **CSAB1770-R68M** is a high-current, shielded surface-mount (SMD) power inductor. It is commonly used in DC-DC converter applications where high efficiency and low electromagnetic interference (EMI) are required. --- ### 1. Technical Specifications The part number follows a specific nomenclature used by manufacturers (typically associated with brands like **Chilisin** or similar power component specialists). | Parameter | Value / Specification | | :--- | :--- | | **Inductance** | 0.68 µH (indicated by "R68") | | **Tolerance** | ±20% (indicated by "M") | | **Case Size** | 1770 (Approx. 17.5 x 17.2 x 7.0 mm) | | **Material** | Metal Alloy Powder (Carbonyl Iron) | | **Shielding** | Magnetically Shielded | --- ### 2. Key Features * **High Saturation Current ($I_{sat}$):** Due to its large physical size and metal powder core, it can handle high peak currents without the inductance dropping significantly. * **Low DC Resistance (DCR):** The heavy-gauge internal wire minimizes power loss through heat, making it suitable for high-efficiency power supplies. * **Soft Saturation:** Unlike ferrite cores that lose inductance abruptly, the metal alloy core provides a "soft" saturation curve, which is safer for voltage regulators. * **Low EMI:** The molded construction acts as a magnetic shield, reducing the noise radiated to surrounding components. --- ### 3. Application Areas These inductors are typically found in high-power industrial and consumer electronics: 1. **Voltage Regulator Modules (VRM):** Used in CPU and GPU power delivery on motherboards. 2. **DC-DC Converters:** Point-of-load (POL) converters for high-current rails. 3. **Battery Powered Systems:** Where high efficiency is critical to extending battery life. 4. **Servers and Networking:** High-wattage power supplies for routers and data centers. --- ### 4. Part Number Breakdown * **CSAB**: Series code (usually denoting Metal Alloy Power Inductors). * **1770**: Physical dimensions ($17 \times 17 \text{ mm}$ footprint, $7.0 \text{ mm}$ height). * **R68**: Inductance value ($0.68 \text{ µH}$). * **M**: Tolerance ($\pm 20\%$).