## HCM1305-R22-R: High-Current Power Inductor The **HCM1305-R22-R** is a high-performance, surface-mount (SMD) power inductor manufactured by Eaton (formerly Cooper Bussmann). It is designed specifically for high-current power applications where low core losses and high efficiency are critical. --- ### 1. Key Technical Specifications Below are the primary electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.22 µH (Microhenries) | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 32.0 Amperes | | **Saturation Current (Isat)** | 75.0 Amperes | | **DC Resistance (DCR)** | 0.8 mΩ (Max) | | **Operating Temperature** | -55°C to +125°C | | **Package Size** | 13.8mm x 12.5mm x 5.0mm | --- ### 2. Core Features & Construction * **Molded Construction:** The inductor uses a powdered iron core material molded around the winding. This provides excellent magnetic shielding and minimizes EMI (Electromagnetic Interference). * **High Saturation:** It is designed to handle very high peak currents without the inductance dropping significantly (Soft Saturation). * **Low DCR:** The exceptionally low DC resistance (0.8 mΩ) minimizes power dissipation as heat, leading to higher system efficiency. * **Frequency Range:** Capable of operating effectively in switching frequencies up to 5 MHz. --- ### 3. Common Applications This part is typically found in high-density power modules and voltage regulation circuits: 1. **Voltage Regulator Modules (VRMs):** Used in CPU/GPU power delivery on motherboards. 2. **DC-DC Converters:** Point-of-load (POL) converters for telecommunications and industrial equipment. 3. **Battery Powered Systems:** Where high efficiency is needed to extend battery life. 4. **Distributed Power Systems:** Managing high-current rails in servers. --- ### 4. Part Number Breakdown Understanding the Eaton nomenclature: | Segment | Meaning | | :--- | :--- | | **HCM** | Series Name (High Current Molded) | | **1305** | Physical Dimensions (Approx. 13mm x 5mm height) | | **R22** | Inductance Value (R22 = 0.22 µH) | | **-R** | RoHS Compliant / Lead-Free | ---