## HCPT1309-R47-R Electronic Component Overview The **HCPT1309-R47-R** is a high-current, high-frequency power inductor manufactured by Eaton (formerly Cooper Bussmann/Coiltronics). It is part of the HCPT series, which utilizes a specialized pressed powder iron core technology designed for high-density power conversion applications. --- ### 1. Technical Specifications Below are the primary electrical and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Inductance** | 0.47 µH | | **Tolerance** | ±20% | | **Rated Current (Irms)** | 38 Amperes (Typical) | | **Saturation Current (Isat)** | 71 Amperes (Typical) | | **DC Resistance (DCR)** | 0.95 mΩ (Nominal) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | SMD (Surface Mount Device) | | **Dimensions** | ~13.0mm x 13.0mm x 9.0mm | --- ### 2. Key Features * **High Current Capability:** Due to its low DCR (Direct Current Resistance), the device can handle very high currents without significant power loss or heat generation. * **Pressed Powder Core:** The iron powder core construction provides a "soft saturation" characteristic. Unlike ferrite cores that drop inductance sharply when saturated, this part loses inductance gradually as current increases. * **Low EMI:** The shielded construction helps contain magnetic flux, reducing Electromagnetic Interference in sensitive circuits. * **High Frequency:** Optimized for switching frequencies ranging from 100 kHz up to 2 MHz. --- ### 3. Application Areas This inductor is typically found in power management stages where high efficiency and small footprint are required: 1. **Voltage Regulator Modules (VRMs):** Used in CPU/GPU power delivery on motherboards. 2. **DC-DC Converters:** Point-of-Load (POL) converters for telecommunications and industrial equipment. 3. **Battery Powered Systems:** Where low DCR is critical to extending battery life. 4. **Distributed Power Systems:** High-current buck, boost, or buck-boost topologies. --- ### 4. Part Number Breakdown * **HCPT:** Series Name (High Current Powder Technology). * **1309:** Dimensions (approx. 13mm footprint, 9mm height). * **R47:** Inductance Value (R47 = 0.47 µH). * **R:** RoHS Compliant / Revision indicator.