The part number **B65887-P-R87** refers to a high-quality ferrite core manufactured by **TDK Electronics (formerly EPCOS)**. Specifically, this is a **PM core** (Pot Core Module) designed for high-power applications. --- ### 1. Technical Specifications The following table summarizes the key characteristics of the B65887-P-R87: | Property | Specification | | :--- | :--- | | **Core Shape** | PM 74/59 (Pot Core Module) | | **Material Grade** | N87 (Power Material) | | **Magnetic Path Length ($l_e$)** | 128 mm | | **Effective Area ($A_e$)** | 790 mm² | | **Effective Volume ($V_e$)** | 101000 mm³ | | **AL Value** | 11000 nH (+30%/-20%) | | **Weight** | Approx. 250g per piece (500g per set) | --- ### 2. Material Properties: N87 The **N87** material is a Manganese-Zinc (MnZn) ferrite designed primarily for power conversion. Its core strengths include: * **Low Power Loss:** Optimized for frequencies up to approximately 300 kHz. * **Temperature Stability:** Minimum power loss is typically reached at around **100°C**, making it ideal for high-temperature operating environments. * **High Saturation:** High flux density ($B_{sat} \approx 490 mT$ at 25°C). --- ### 3. Applications The PM (Pot Module) shape is unique because it provides a large surface area for winding and excellent magnetic shielding. Common uses include: 1. **High Power Transformers:** Used in SMPS (Switched Mode Power Supplies) for telecommunications and industrial electronics. 2. **Resonant Circuit Inductors:** Due to the stable N87 material characteristics. 3. **Solar Inverters:** Handling high throughput power with minimal energy waste. 4. **EV Charging:** Used in DC-DC converters within electric vehicle infrastructure. --- ### 4. Part Number Breakdown ```text B65887 - P - R87 | | | | | +-- Material Grade: N87 | +------ Shape Identifier: PM Core (Pot Module) +------------- Base Part Series (Size 74/59) ``` ---