The part number **B65807-P-R49** refers to a high-quality **Ferrite Core** manufactured by **TDK Electronics (formerly EPCOS)**. Specifically, this belongs to the **RM6** (Rectangular Modul) core family, which is widely used in telecommunications and power electronics due to its compact design and shielding properties. --- ### 1. Technical Specifications The part number can be broken down into specific electrical and physical characteristics: | Property | Value / Description | | :--- | :--- | | **Core Shape** | RM6 (Rectangular Module 6) | | **Material** | N49 (High-frequency material) | | **$A_L$ Value** | 250 nH (Inductance per turn squared) | | **Air Gap** | Gapped ($P$ suffix indicates a specific gap/tuning) | | **Frequency Range** | Suitable for up to ~1 MHz | | **Core Factor ($\Sigma l/A$)** | 0.78 $mm^{-1}$ | | **Effective Volume ($V_e$)** | 840 $mm^3$ | --- ### 2. Key Component Features #### **A. Material: N49** The **N49** material is a Power Ferrite designed specifically for low power losses at high frequencies. * **Optimal Frequency:** It performs best between **300 kHz and 1 MHz**. * **Saturation:** It has high saturation flux density, making it stable under load. * **Temperature Stability:** Designed to maintain performance even as the component heats up. #### **B. Shape: RM6** The RM (Rectangular Module) core shape offers several advantages: * **Self-Shielding:** The design minimizes stray magnetic fields, reducing Electromagnetic Interference (EMI). * **Space Efficiency:** It provides maximum inductance in a minimum footprint on a PCB. * **Ease of Assembly:** Typically used with a bobbin (coil former) and clips for fast mounting. --- ### 3. Common Applications Due to the N49 material and the RM6 shape, this part is typically found in: 1. **Switch-Mode Power Supplies (SMPS):** Small DC-DC converters. 2. **Signal Transformers:** Used in telecommunications for high-frequency data transmission. 3. **Inductors:** Used in resonance circuits where high $Q$ factors are required. 4. **Broadband Transformers:** In RF applications. --- ### 4. Accessory Requirements To use the **B65807-P-R49** core in a design, you generally need the following matching accessories: * **Bobbin:** B65808 series (available in SMD or Through-hole versions). * **Clips:** B65808 series (to hold the two core halves together).