The **LD1-330-R** is a high-performance, surface-mount (SMT) power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the **LD series**, which is designed for high-density applications requiring low core losses and high current handling. --- ### 1. Key Technical Specifications The part number "330" indicates the inductance value, and "R" signifies RoHS compliance. | Parameter | Specification | | :--- | :--- | | **Inductance** | 33.0 µH (Microhenries) | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | ~0.106 Ω (Typical) | | **Saturation Current ($I_{sat}$)** | ~1.6 Amps (Current at which L drops 10%) | | **RMS Current ($I_{rms}$)** | ~1.5 Amps (Current for 40°C temp rise) | | **Operating Temp** | -40°C to +125°C | | **Core Material** | Ferrite | --- ### 2. Physical Construction The LD1-330-R is engineered for durability and efficiency in a small footprint: * **Case Size (LD1):** Approximately 6.1mm x 5.6mm with a height of 2.8mm. * **Shielding:** It is a **shielded** inductor. This is critical because it contains the magnetic field, preventing electromagnetic interference (EMI) with neighboring components on the PCB. * **Mounting:** SMT (Surface Mount Technology) with robust solder pads for high vibration resistance. --- ### 3. Core Applications This specific inductor is commonly found in power management circuits, including: * **DC-DC Converters:** Used in Buck (step-down) or Boost (step-up) converters to store and release energy. * **Voltage Regulator Modules (VRMs):** Providing stable power to microprocessors and FPGAs. * **Noise Filtering:** Acting as a low-pass filter in power lines to remove high-frequency switching noise. * **Consumer Electronics:** Found in tablets, laptops, and LED drivers where space is limited but efficiency is required. --- ### 4. Comparison: LD1 vs. Other Sizes The LD series comes in various sizes (LD1, LD2, LD3, etc.). The **LD1** is the smallest in the family, prioritizing a low profile over raw current capacity. ```python # Comparison of LD1-330-R vs larger sizes (approximate values) part_data = { "LD1-330-R": {"Current": "1.5A", "Size": "6.1x5.6mm"}, "LD2-330-R": {"Current": "2.1A", "Size": "7.5x7.5mm"}, "LD3-330-R": {"Current": "3.5A", "Size": "13.0x9.4mm"} } ``` ---