The **HCM0503-3R3-R** is a high-current, automotive-grade power inductor manufactured by Eaton (formerly Bussmann). It is part of the HCM series, designed to handle high-power density in compact electronic circuits. --- ### 1. Technical Specifications Below are the primary electrical and physical characteristics of the component: | Parameter | Value | | :--- | :--- | | **Inductance** | 3.3 µH | | **Tolerance** | ±20% | | **Rated Current (Irms)** | 5.2 Amperes | | **Saturation Current (Isat)** | 8.0 Amperes | | **DC Resistance (DCR)** | 33.6 mΩ (Typical) | | **Operating Temperature** | -55°C to +125°C | | **Package Size** | 5.5mm x 5.3mm x 3.0mm | --- ### 2. Key Features * **High Current Handling:** Designed for applications requiring stable inductance under high current loads. * **Shielded Construction:** It features magnetic shielding to minimize Electromagnetic Interference (EMI), making it suitable for noise-sensitive environments. * **Low Core Loss:** The powdered iron core material provides efficient performance with minimal energy dissipation. * **AEC-Q200 Qualified:** This indicates the part has passed rigorous stress tests for automotive reliability. --- ### 3. Applications The HCM0503-3R3-R is commonly integrated into the following systems: 1. **Voltage Regulator Modules (VRM):** Used in DC-DC converters to smooth output current. 2. **Automotive Electronics:** Powering Advanced Driver Assistance Systems (ADAS), infotainment, and LED lighting. 3. **Industrial Computing:** Used in high-density power supplies for servers and embedded systems. 4. **Battery Powered Devices:** Provides efficient energy storage in portable power management units. --- ### 4. Part Number Breakdown `HCM` `0503` - `3R3` - `R` * **HCM:** High Current Molded Inductor Series. * **0503:** Physical dimensions (approx. 5x5mm footprint, 3mm height). * **3R3:** Inductance value (3.3 microhenries). * **R:** RoHS compliant / Lead-free.