The **CTX0.47-2P-R** is a high-performance, surface-mount (SMD) power inductor commonly used in DC-DC converters and power management circuits. It belongs to the **OCTA-PAC® PLUS** series manufactured by Eaton (formerly Cooper Bussmann/Coiltronics). --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its electrical properties: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.47 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | ~1.6 mΩ (per winding) | | **Isat (Saturation Current)** | ~22 - 30 Amperes | | **Irms (Heating Current)** | ~14.5 Amperes | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | Size 2P (approx. 11.4 x 11.4 x 6.0 mm) | --- ### 2. Key Features and Design The "2P" designation indicates that this is a **dual-winding** inductor, which provides significant versatility in circuit design. * **Dual Winding:** It contains two separate coils on a single core. These can be connected in: * **Series:** To increase inductance. * **Parallel:** To increase current handling capacity. * **Transformer mode:** Used as a 1:1 coupled inductor for SEPIC or Flyback topologies. * **High Power Density:** The OCTA-PAC® PLUS series uses a high-grade E-core ferrite material that offers low core losses at high frequencies. * **Shielding:** It is magnetically shielded, which minimizes Electromagnetic Interference (EMI) with surrounding components. * **RoHS Compliant:** The "-R" suffix indicates that the part is lead-free and compliant with environmental regulations. --- ### 3. Common Applications Due to its high current rating and dual-winding flexibility, the CTX0.47-2P-R is typically found in: 1. **SEPIC Converters:** Used as a coupled inductor to maintain energy flow in both input and output stages. 2. **Multi-phase Buck Converters:** Used in high-current VRMs (Voltage Regulator Modules) for CPUs and GPUs. 3. **Battery Powered Systems:** Ideal for high-efficiency power supplies in portable equipment. 4. **Solar Inverters:** Used in small-scale power optimization and DC-DC conversion. --- ### 4. Part Number Breakdown * **CTX:** Series Name (Coiltronics/Eaton). * **0.47:** Inductance value in microhenries (µH). * **2P:** Case Size and Power rating (Plus series). * **R:** RoHS Compliant.