The part number **B65815-P-R87** refers to a high-quality ferrite core accessory, specifically an **RM10 (Rectangular Modul) core set** manufactured by TDK Electronics (formerly EPCOS). Below is a detailed breakdown of the electronic specifications and characteristics for this component. --- ### 1. Component Overview The B65815 series belongs to the **RM (Rectangular Modul)** core family. These cores are designed for high-density power applications and telecommunications due to their efficient use of space and excellent shielding properties. ### 2. Technical Specifications | Feature | Description | | :--- | :--- | | **Core Shape** | RM10 (Rectangular Module, Size 10) | | **Material Grade** | N87 (Power Material) | | **AL Value** | 4300 nH (+30% / -20%) | | **Effective Permeability ($\mu_e$)** | 1720 | | **Air Gap** | None (Ungapped) | | **Core Set** | Consists of two halves (ordered as a set) | ### 3. Material Properties (N87 Grade) The **N87** material is a Manganese-Zinc (MnZn) ferrite designed primarily for power transformers and switch-mode power supplies (SMPS). * **Frequency Range:** Optimized for frequencies up to approximately 500 kHz. * **Saturation Flux Density:** High saturation (~490 mT at 25°C). * **Low Core Losses:** Specifically engineered to minimize energy loss at high temperatures (typically measured at 100°C). ### 4. Key Advantages * **Self-Shielding:** The shape of the RM core provides excellent magnetic shielding, reducing Electromagnetic Interference (EMI). * **Compact Footprint:** Offers a high inductance-to-volume ratio, making it ideal for compact PCB layouts. * **Integrated Design:** Often paired with specific bobbins (coils formers) and clips for easy automated assembly. ### 5. Common Applications 1. **Switch-Mode Power Supplies (SMPS):** Used in DC-DC converters and AC-DC adapters. 2. **Inductors:** High-quality storage or filter inductors. 3. **Telecommunications:** Signal transformers where low distortion and high stability are required. 4. **Resonant Circuit Transformers:** Due to the stable performance of the N87 material. ---