The **HCM1A1305V2-R22-R** is a high-current, power inductor designed by Eaton (formerly Bussmann). It is part of the HCM1A series, which is specifically engineered to meet automotive electronics requirements, particularly for high-temperature and high-reliability environments. --- ### ## Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 0.22 µH | | **Tolerance** | ±20% | | **Rated Current (Idc)** | 55.0 Amps | | **Saturation Current (Isat)** | 80.0 Amps | | **DC Resistance (DCR)** | 0.63 mΩ (Typical) | | **Operating Temperature** | -55°C to +155°C | | **Package Size** | 1305 (approx. 13.8 x 12.5 x 5.0 mm) | | **AEC-Q200 Qualified** | Yes (Grade 1) | --- ### ### Key Features 1. **High Current Handling:** With a saturation current of 80A, this part is designed for high-density power conversion where massive current spikes occur. 2. **Molded Construction:** The inductor uses a metal powder molding technology. This provides "soft saturation" characteristics (inductance drops gradually rather than abruptly) and minimizes electromagnetic interference (EMI). 3. **Low DCR:** The exceptionally low DC resistance (under 1 milliohm) ensures minimal power loss and reduces heat generation during operation. 4. **Automotive Grade:** Being AEC-Q200 Grade 1 qualified, it is tested for mechanical shock, vibration, and extreme thermal cycling. --- ### ### Common Applications * **Automotive Systems:** Advanced Driver Assistance Systems (ADAS), infotainment, and Body Control Modules (BCM). * **Voltage Regulator Modules (VRMs):** High-efficiency point-of-load (POL) converters for CPUs and GPUs. * **DC-DC Converters:** Used in multi-phase regulators to step down voltage in high-power servers or industrial equipment. --- ### ### Part Number Breakdown ```text HCM1A 1305 V2 - R22 - R | | | | | | | | | +-- RoHS Compliant | | | +------- Inductance Value (R22 = 0.22 µH) | | +------------ Version 2 (Improved materials/process) | +---------------- Physical Size (13mm x 5mm height) +---------------------- Product Series (High Current Molded Automotive) ```