The **HCMA1305-R22-R** is a high-current power inductor designed specifically for automotive and industrial applications. It belongs to the HCMA series manufactured by Eaton (formerly Cooper Bussmann). --- ### 1. General Specifications The part number can be decoded to understand its core electronic properties: | Parameter | Specification | Details | | :--- | :--- | :--- | | **Inductance** | 0.22 µH | Low inductance for high-frequency switching. | | **Tolerance** | ±20% | Standard tolerance for power inductors. | | **Current Rating (Irms)** | 32 Amps | Continuous current handling capability. | | **Saturation Current (Isat)** | 80 Amps | The point where inductance drops by 20%. | | **DC Resistance (DCR)** | 1.15 mΩ (Max) | Extremely low resistance to minimize heat loss. | | **Operating Temp** | -55°C to +125°C | AEC-Q200 Grade 1 qualified. | --- ### 2. Key Electronic Features * **Magnetically Shielded:** The part uses an iron powder core construction. This minimizes Electromagnetic Interference (EMI) with surrounding components on the PCB. * **High Power Density:** The "1305" footprint (approx. 13.8mm x 12.5mm x 5.0mm) allows for very high current handling in a relatively compact surface-mount package. * **Low Core Loss:** Optimized for high-frequency DC-DC converters (up to several MHz), reducing energy wasted as heat. * **AEC-Q200 Qualified:** This means the part has undergone rigorous mechanical and electrical stress testing, making it suitable for automotive environments (engine control units, infotainment, etc.). --- ### 3. Application Use Cases This specific inductor is typically found in high-current power stages, such as: 1. **Voltage Regulator Modules (VRMs):** Providing stable power to CPUs or GPUs. 2. **DC-DC Converters:** Point-of-load (POL) converters in automotive telematics. 3. **Battery Management Systems (BMS):** Handling high-current filtering. 4. **LED Lighting:** High-power automotive headlight drivers. --- ### 4. Physical Dimensions (Approximate) | Dimension | Measurement (mm) | | :--- | :--- | | **Length** | 13.8 max | | **Width** | 12.5 max | | **Height** | 5.0 max |