### Technical Overview: HCM1305-330-R The **HCM1305-330-R** is a high-current, magnetically shielded power inductor manufactured by **Eaton (formerly Coiltronics)**. It belongs to the HCM series, designed specifically to meet the high-density and high-current requirements of modern computing and industrial power applications. --- ### 1. Key Technical Specifications | Parameter | Value / Description | | :--- | :--- | | **Inductance** | 33 $\mu$H | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 5.2 Amperes | | **Saturation Current (Isat)** | 6.0 Amperes | | **DC Resistance (DCR)** | 48.0 mΩ (Typical) | | **Operating Temperature** | -55°C to +125°C | | **Package / Case** | 13.8mm x 12.5mm x 5.0mm (SMD) | --- ### 2. Core Features and Construction * **Magnetically Shielded:** The part is constructed using an iron powder core material. This minimizes Electromagnetic Interference (EMI) and prevents the magnetic field from affecting nearby sensitive components. * **High Current Handling:** Designed for low core losses and high saturation levels, allowing it to maintain inductance even under significant electrical loads. * **Halogen Free & RoHS Compliant:** Meets modern environmental safety standards for electronic manufacturing. * **Low DCR:** The low Direct Current Resistance ensures minimal power loss through heat, increasing the overall efficiency of the power supply. --- ### 3. Common Applications The HCM1305-330-R is primarily used in **DC-DC converters** and voltage regulation modules. Specific use cases include: 1. **Computing:** Multi-phase regulators, Voltage Regulator Modules (VRMs) for CPUs and GPUs. 2. **Industrial:** High-density power supplies and point-of-load (POL) converters. 3. **Networking:** Power systems for routers, switches, and base stations. 4. **Battery Powered Systems:** Where efficiency and low heat generation are critical for battery life. --- ### 4. Footprint and Dimensions The "1305" in the part number refers to its physical dimensions (approximately 13mm x 13mm with a 5mm height profile). ```text Length: 13.8 mm (Max) Width: 12.5 mm (Max) Height: 5.0 mm (Max) ``` ---