The **HCM1104-R45-R** is a high-current, shielded power inductor designed by Eaton (formerly Bussmann). It belongs to the HCM series, which is specifically engineered to handle high transient current spikes and provide low electromagnetic interference (EMI). --- ### ## Technical Specifications Below are the primary electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.45 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 1.1 mΩ (Typical) | | **Rated Current (Irms)** | 29 A | | **Saturation Current (Isat)** | 45 A | | **Operating Temperature** | -55°C to +125°C | | **Package / Case** | 11.5mm x 10.3mm x 4.0mm (SMD) | --- ### ## Key Features * **High Current Capability:** Designed for power supplies requiring high current density without core saturation. * **Magnetic Shielding:** The iron powder core material provides effective shielding, reducing EMI in sensitive circuits. * **Low DCR:** The extremely low DC resistance minimizes power loss and heat generation, increasing overall system efficiency. * **Rugged Construction:** Its molded construction offers high resistance to moisture and mechanical shock. --- ### ## Common Applications The HCM1104 series is typically used in high-frequency DC-DC converters and voltage regulator modules (VRMs). 1. **Multi-phase Regulators:** Used in CPU/GPU power delivery for servers and workstations. 2. **Point-of-Load (POL) Converters:** Providing stable power to FPGAs and ASICs. 3. **Industrial Electronics:** High-current power supplies for robotics and automation. 4. **Battery Powered Systems:** Where high efficiency and compact size are critical. --- ### ## Part Number Breakdown The part number follows a specific nomenclature: * **HCM:** Series Name (High Current Inductor, Molded) * **1104:** Size Dimensions (approx. 11mm x 4mm height) * **R45:** Inductance Value (R45 = 0.45 µH) * **-R:** RoHS Compliant