The **HCM1305-R10-R** is a high-current, automotive-grade power inductor manufactured by **Eaton (formerly Bussmann)**. It is part of the HCM series, specifically designed to handle high power density and high current requirements in a compact surface-mount package. --- ### 1. Key Technical Specifications The following table outlines the primary electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.10 µH (R10) | | **Tolerance** | ±20% | | **Rated Current (Irms)** | 43 Amps | | **Saturation Current (Isat)** | 100 Amps | | **DC Resistance (DCR)** | 0.96 mΩ (Max) | | **Operating Temperature** | -55°C to +125°C | | **Package Size** | 1305 (approx. 13.8 x 12.5 x 5.0 mm) | | **Construction** | Iron powder core / Shielded | --- ### 2. Breakdown of the Part Number Understanding the nomenclature helps in identifying variants within the series: - **HCM**: Series Name (High Current Inductor). - **1305**: Dimensions (Length/Width approx 13mm, Height approx 5mm). - **R10**: Inductance Value (R denotes the decimal point; R10 = 0.10 µH). - **-R**: RoHS Compliant. --- ### 3. Core Features and Benefits * **High Current Handling:** With a saturation current of 100A, this inductor is capable of handling massive surges without the inductance dropping significantly. * **Low DCR:** The extremely low DC resistance (less than 1 mΩ) ensures minimal power loss through heat, making it highly efficient. * **Magnetically Shielded:** The molded construction minimizes Electromagnetic Interference (EMI), which is critical in sensitive automotive or communication circuits. * **AEC-Q200 Qualified:** This indicates the part has passed rigorous stress testing for automotive reliability. --- ### 4. Typical Applications The HCM1305-R10-R is commonly used in high-frequency switching environments: 1. **Voltage Regulator Modules (VRM):** Used in CPU/GPU power delivery for servers and workstations. 2. **DC-DC Converters:** Essential in point-of-load (POL) converters where high efficiency is required. 3. **Automotive Systems:** Powering Infotainment systems, Advanced Driver Assistance Systems (ADAS), and body electronics. 4. **Battery Powered Systems:** Ideal for high-discharge battery management circuits. ---