The **HCMA1307-R47-R** is a high-current, automotive-grade power inductor manufactured by Eaton (formerly Cooper Bussmann). It belongs to the HCMA series, which is specifically designed to handle high power densities and harsh environmental conditions. ### 1. Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 0.47 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 1.15 mΩ (Typical) / 1.34 mΩ (Max) | | **Rated Current (Irms)** | 35 Amps | | **Saturation Current (Isat)** | 54 Amps | | **Operating Temperature** | -55°C to +125°C | | **Package Size** | 1307 (Approx. 13.8mm x 12.5mm x 6.5mm) | --- ### 2. Physical Construction and Features * **Molded Construction:** The part uses a powder iron core technology. The coil is molded directly into the magnetic material, which provides excellent magnetic shielding and minimizes "buzz" noise (acoustic noise). * **Surface Mount (SMD):** Designed for automated pick-and-place assembly. * **AEC-Q200 Qualified:** This means the part has passed rigorous stress testing for the automotive industry, ensuring high reliability under vibration and thermal shock. * **High Efficiency:** The extremely low DCR (Direct Current Resistance) minimizes power loss due to heat, making it ideal for high-efficiency power converters. --- ### 3. Part Number Breakdown Understanding the nomenclature helps in identifying variants: | Component | Meaning | | :--- | :--- | | **HCMA** | Product Series (High Current Automotive) | | **1307** | Size Dimensions (Length/Width and Height) | | **R47** | Inductance Value (R47 = 0.47 µH) | | **-R** | RoHS Compliant / Lead-Free | --- ### 4. Typical Applications Because of its high current handling and 0.47 µH low inductance, this component is typically found in: * **Automotive Electronics:** Advanced Driver Assistance Systems (ADAS), infotainment, and engine control units (ECU). * **Voltage Regulator Modules (VRM):** Used in high-speed computing and servers. * **DC-DC Converters:** Point-of-load (POL) converters where high efficiency and high current are required in a small footprint. ---