The **HCV1206-R90-R** is a high-current, power inductor typically manufactured by companies like Eaton (Bussmann). It is designed specifically for high-frequency voltage regulator modules (VRMs) and power conversion applications. ### 1. Technical Specifications The part number follows a specific nomenclature that defines its physical and electrical characteristics. | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.90 µH (900 nH) | | **Package Size** | 1206 (3.2mm x 1.6mm) | | **Tolerance** | ±20% | | **Current Rating (Irms)** | High Current (Typically >20A depending on temp rise) | | **DCR (DC Resistance)** | Ultra-low (Typically <1.0 mΩ) | | **Core Material** | Ferrite | | **Operating Temp** | -40°C to +125°C | --- ### 2. Key Features * **High Current Density:** Despite its small "1206" footprint, it is engineered to handle high saturation currents without the inductance dropping significantly. * **Low DCR:** The very low direct current resistance minimizes power loss ($P = I^2R$), which is critical for maintaining high efficiency in power supplies. * **Surface Mount Design (SMD):** Optimized for automated pick-and-place assembly. * **Lead-Free/RoHS Compliant:** The "-R" suffix usually denotes compliance with environmental standards and lead-free termination. --- ### 3. Common Applications This inductor is used in circuits where space is limited but power requirements are high: 1. **Multi-phase Buck Converters:** Used in CPU/GPU power delivery for servers and workstations. 2. **Voltage Regulator Modules (VRM):** Converting 12V inputs to low-voltage, high-current outputs (e.g., 1.2V). 3. **Point of Load (POL) Converters:** Providing stable power to FPGAs and ASICs. 4. **Battery Powered Systems:** Where efficiency is vital to extending battery life. --- ### 4. Part Number Breakdown * **HCV:** High Current Inductor Series. * **1206:** Physical dimensions (roughly 0.12 x 0.06 inches). * **R90:** Inductance value (R represents the decimal point; 0.90 µH). * **-R:** RoHS compliant version.