## HCM1305-2R2-R Technical Overview The **HCM1305-2R2-R** is a high-current, automotive-grade power inductor manufactured by **Eaton (formerly Bussmann)**. It belongs to the HCM series, which is specifically designed to handle high transient current spikes and provide low electromagnetic interference (EMI). --- ### 1. Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 2.2 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 5.5 mΩ (Typical) / 6.6 mΩ (Max) | | **Rated Current (Irms)** | 15.5 A | | **Saturation Current (Isat)** | 20 A | | **Operating Temperature** | -55°C to +125°C | | **Package / Case** | 13.8mm x 12.5mm x 5.0mm (Surface Mount) | --- ### 2. Core Features and Construction * **High Current Handling:** The inductor is designed to manage significant power levels, making it ideal for DC-DC converters and high-current power supplies. * **Magnetically Shielded:** The part features an iron powder core construction. This provides effective magnetic shielding, which minimizes EMI and prevents the inductor from interfering with nearby sensitive components. * **Low Core Loss:** The materials used are optimized for efficiency, reducing energy waste through heat during high-frequency switching. * **Automotive Grade:** It is **AEC-Q200 Grade 1** qualified, meaning it has passed rigorous stress tests for reliability in harsh automotive environments (vibration, thermal shock, etc.). --- ### 3. Application Areas The HCM1305-2R2-R is commonly found in the following systems: 1. **Automotive Electronics:** Powering Advanced Driver Assistance Systems (ADAS), infotainment, and LED lighting. 2. **Voltage Regulator Modules (VRM):** Used in multi-phase regulators for CPUs and GPUs. 3. **Industrial Power Supplies:** High-efficiency DC-DC converters and point-of-load (POL) modules. 4. **Battery Powered Systems:** Where low DCR is critical to extending battery life. --- ### 4. Part Number Breakdown | Prefix | Size Code | Inductance Value | RoHS Compliance | | :--- | :--- | :--- | :--- | | **HCM** | **1305** | **2R2** | **-R** | | High Current Series | 13mm x 5mm approx | 2.2 Microhenries | RoHS Compliant |