## HCM1104-R36-R: Technical Overview The **HCM1104-R36-R** is a high-current, shielded power inductor designed by Eaton (formerly Cooper Bussmann). It is specifically engineered for high-frequency DC-DC converters and high-density power applications. --- ### 1. Key Technical Specifications | Parameter | Value | Details | | :--- | :--- | :--- | | **Inductance** | 0.36 µH | Measured at 100 kHz, 0.1 Vrms | | **Rated Current ($I_{rms}$)** | 26.0 A | Current causing a 40°C temperature rise | | **Saturation Current ($I_{sat}$)** | 40.0 A | Current causing a 20% drop in inductance | | **DC Resistance (DCR)** | 1.1 mΩ (Typ) | 1.3 mΩ (Max) at 20°C | | **Operating Temperature** | -55°C to +125°C | Includes self-heating | | **Footprint Size** | 11.0 x 10.0 mm | Height: 4.0 mm | --- ### 2. Core Features and Construction * **Magnetically Shielded:** The part features an iron powder core construction. This minimizes Electromagnetic Interference (EMI) by containing the magnetic flux within the component body. * **High Current Handling:** Due to its low DCR and robust core material, it can handle significant current with minimal power loss. * **Low Core Loss:** Optimized for high-frequency switching (up to 2 MHz or higher), reducing heat generation in power supplies. * **Rugged Design:** The "HCM" series is known for high mechanical stability and resistance to thermal shock. --- ### 3. Application Use Cases This component is typically found in the following power stages: 1. **Voltage Regulator Modules (VRM):** Used in servers and desktops to step down voltage for CPUs/GPUs. 2. **Point of Load (POL) Converters:** Providing stable power to FPGAs or ASICs on complex PCBs. 3. **Battery Powered Systems:** High efficiency is critical for extending battery life. 4. **Automotive Electronics:** Used in infotainment and body control modules (ensure AEC-Q200 compliance if required for specific variants). --- ### 4. Part Number Breakdown The part number follows a standard Eaton nomenclature: ```text HCM 1104 - R36 - R | | | | | | | +-- RoHS Compliant | | +------- Inductance Value (R36 = 0.36 µH) | +-------------- Size Code (11mm length, 4mm height) +------------------- Series Name (High Current Inductor) ```