The **HCMA1305-100-R** is a high-current, automotive-grade power inductor manufactured by Eaton (formerly Bussmann). It is part of the HCMA series, which is specifically designed to handle high power densities and withstand harsh environments. --- ### ## Technical Specifications Below are the primary electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 10.0 µH | | **Tolerance** | ±20% | | **Rated Current (Irms)** | 10.0 Amperes | | **Saturation Current (Isat)** | 12.0 Amperes | | **DC Resistance (DCR)** | 15.5 mΩ (Typical) | | **Operating Temperature** | -55°C to +125°C | | **Package / Case** | 13.8mm x 12.5mm x 5.0mm | | **AEC-Q200 Qualified** | Yes (Automotive Grade) | --- ### ## Key Features 1. **Construction**: It utilizes a molded iron powder core technology. This "pressed" construction provides excellent magnetic shielding to minimize Electromagnetic Interference (EMI). 2. **Soft Saturation**: Unlike ferrite core inductors that drop inductance sharply when current limits are reached, the HCMA series features a gradual saturation curve. 3. **Environmental Ruggedness**: The part is AEC-Q200 Grade 1 qualified, making it resistant to mechanical shock, vibration, and moisture. 4. **Low DCR**: The low internal resistance helps minimize power loss through heat (Joule heating), improving overall circuit efficiency. --- ### ## Applications This inductor is typically used in DC-DC converters and voltage regulator modules (VRMs). Common applications include: * **Automotive Systems**: Advanced Driver Assistance Systems (ADAS), infotainment, and engine control units (ECU). * **Industrial Electronics**: High-current power supplies and battery-powered systems. * **Computing**: Distributed power systems and servers. --- ### ## Part Number Breakdown The naming convention follows a specific logic: * **HCMA**: Product Series (High Current Automotive). * **1305**: Dimensions (Approx. 13mm footprint, 5mm height). * **100**: Inductance value (10 followed by 0 zeros = 10µH). * **-R**: RoHS compliant.