The part number **B65716-L-R30** refers to a high-quality **Ferrite Core** manufactured by TDK Electronics (formerly EPCOS). It belongs to the **PQ core** series, which is specifically designed for high-density power applications. --- ### 1. Technical Specifications The part number is encoded with specific technical meanings. Below is a breakdown of its physical and magnetic properties: | Feature | Specification | | :--- | :--- | | **Core Shape** | PQ 50/50 | | **Material Type** | N30 (High Permeability Manganese Zinc) | | **Magnetic Path Length ($l_e$)** | ~113 mm | | **Effective Cross Section ($A_e$)** | ~328 mm² | | **Effective Volume ($V_e$)** | ~37200 mm³ | | **AL Value** | ~7500 nH (approx. based on N30 material) | --- ### 2. Detailed Component Breakdown #### A. The "PQ" Shape The PQ (Power Quality) geometry is optimized for Switched-Mode Power Supplies (SMPS). * **Space Efficiency:** It offers a better ratio of volume to winding area compared to E-cores. * **Shielding:** The shape provides better magnetic shielding than standard toroids or E-cores, reducing Electromagnetic Interference (EMI). * **Heat Dissipation:** The round center post allows for easy winding and efficient cooling. #### B. Material: N30 The **N30** material designation indicates a Manganese Zinc (MnZn) ferrite. * **High Permeability:** This material is designed for high inductance with fewer wire turns. * **Frequency Range:** Ideal for applications operating in the lower to medium frequency range (up to ~400 kHz). * **Temperature Stability:** It maintains magnetic stability over a wide temperature range, typical for industrial power electronics. --- ### 3. Common Applications This specific core is typically used in heavy-duty power electronics, including: 1. **SMPS Transformers:** Main power transformers for AC/DC converters. 2. **Power Inductors:** Used in DC/DC converters for energy storage. 3. **EMI Filters:** High-inductance chokes for suppressing line noise. 4. **Inverters:** Solar power inverters and uninterruptible power supplies (UPS). --- ### 4. Mounting and Accessories To create a complete functional component, the B65716 core usually requires: * **Bobbin (Coil Former):** Usually a plastic frame (e.g., B65717 series) to hold the copper windings. * **Clamps/Yokes:** Stainless steel clips to hold the two halves of the core together securely.