The **CPLA-2-50TR-R** is a specialized electronic component primarily categorized as a **Surface Mount (SMT) Power Inductor** (specifically a Coupled Inductor or Choke). It is manufactured by **Eaton (formerly Coiltronics/Bussmann)**. --- ### 1. Key Technical Specifications Below are the primary technical parameters for the CPLA-2-50TR-R: | Parameter | Specification | |:---|:---| | **Inductance** | 50 nH (Nominal per phase) | | **Current Rating (Irms)** | ~25A - 40A (Varies by application temperature) | | **DCR (Direct Current Resistance)** | Extremely Low (~0.5 mΩ - 0.6 mΩ) | | **Number of Phases** | 2 (Dual Phase) | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Operating Temperature** | -40°C to +125°C | | **Dimensions** | Approx. 11.5mm x 7.0mm x 5.0mm | --- ### 2. Physical Construction & Features * **Coupled Inductor Design:** Unlike standard inductors, this part contains multiple windings on a single magnetic core. This allows for magnetic coupling between phases. * **High Current Handling:** It is designed using flat-wire technology or high-performance ferrite materials to handle high saturation currents without losing efficiency. * **Compact Footprint:** The "2-50" designation often refers to the 2-phase configuration and the 50nH inductance per phase, packed into a small SMT package to save PCB real estate. --- ### 3. Primary Applications This component is specifically engineered for high-density power conversion: 1. **Multi-phase VRMs (Voltage Regulator Modules):** Used in CPU and GPU power delivery systems on motherboards and server cards. 2. **Point-of-Load (PoL) Converters:** High-efficiency DC-DC converters for telecommunications and data centers. 3. **High-Speed Computing:** Applications requiring rapid transient response and high current at very low voltages. --- ### 4. Part Number Breakdown The nomenclature typically follows this logic: * **CPLA:** Series name (Coupled Power Lead-frame Inductor). * **2:** Number of phases/windings. * **50:** Inductance value (50 nanohenries). * **TR:** Tape and Reel packaging. * **R:** RoHS compliant. --- ### 5. Benefits of Using a Coupled Inductor Using the CPLA-2-50TR-R instead of two discrete inductors provides: * **Improved Efficiency:** Reduced switching losses due to current ripple cancellation. * **Better Transient Response:** Faster reaction to sudden changes in CPU/GPU load. * **Reduced Component Count:** Simplifies PCB layout and reduces the overall bill of materials (BOM).