The part number **B65754-J-R26** refers to a high-quality **Ferrite Core** manufactured by **TDK Electronics (formerly EPCOS)**. Specifically, this part is an **RM core (Rectangular Modular)**, which is widely used in telecommunications and power conversion due to its compact design and efficient shielding. --- ### 1. Technical Specifications Below are the primary technical parameters for the B65754-J-R26: | Parameter | Specification | | :--- | :--- | | **Core Shape** | RM14 (Rectangular Modular) | | **Material** | N26 (High permeability material) | | **Inductance Factor (AL)** | Approx. 14,000 nH (Depends on gapping) | | **Initial Permeability ($\mu_i$)** | ~2000 | | **Effective Volume ($V_e$)** | 10,250 $mm^3$ | | **Effective Length ($l_e$)** | 70 $mm$ | | **Effective Area ($A_e$)** | 145 $mm^2$ | --- ### 2. Core Material: N26 The **N26** material designation is critical. It is a Manganese-Zinc (MnZn) ferrite material optimized for specific performance traits: * **High Permeability:** Suitable for broadband transformers and low-loss inductors. * **Frequency Range:** Best performing in the range of **10 kHz to 300 kHz**. * **Stability:** Offers good temperature stability for the inductance value. --- ### 3. Physical Attributes & Design The "RM" (Rectangular Modular) series offers several design advantages over standard E-cores or Toroids: * **Integrated Shielding:** The shape of the RM core partially encloses the winding, providing better EMI (Electromagnetic Interference) shielding than an open E-core. * **Space Efficiency:** Designed to fit tightly on Printed Circuit Boards (PCBs) with standardized pin spacings. * **Clamping:** Usually requires a specialized clip (clamp) and a bobbin (coil former) to complete the assembly. ### 4. Common Applications This specific core is typically found in: 1. **Telecommunications:** Signal transformers and high-quality filter inductors. 2. **Power Supplies:** Small-to-medium Switch Mode Power Supplies (SMPS). 3. **Inductive Sensors:** Due to the high permeability and stable core geometry. 4. **Resonant Circuit Inductors:** Used in circuits requiring high Q-factors. --- ### 5. Part Number Breakdown (Example) * **B65754:** Represents the physical size (RM14 series). * **J:** Designates the mechanical version/mounting style. * **R26:** Refers to the **N26** ferrite material grade.