The part number **B65611-W-R30** refers to a high-quality magnetic ferrite core manufactured by **TDK Electronics (formerly EPCOS)**. Specifically, it is a **P-core (Pot Core)** made from the **N30** ferrite material. --- ### 1. Technical Specifications The following table outlines the primary electrical and physical characteristics of this component: | Parameter | Specification | | :--- | :--- | | **Core Type** | P 30 x 19 (Pot Core) | | **Material Grade** | N30 (High permeability) | | **AL Value** | 10000 nH (+40% / -30%) | | **Effective Permeability ($\mu_e$)** | ~3610 | | **Effective Volume ($V_e$)** | 6340 $mm^3$ | | **Effective Length ($l_e$)** | 45.2 $mm$ | | **Effective Area ($A_e$)** | 140 $mm^2$ | | **Weight** | Approx. 40g per set | --- ### 2. Breakdown of the Part Number Understanding the nomenclature helps in identifying its function: * **B65611**: Indicates the physical size and series (P 30 x 19 mm). * **W**: Refers to the mounting/assembly style (usually denotes "with center hole"). * **R30**: Indicates the material grade **N30**. --- ### 3. Key Features of N30 Material The **N30** material is a Manganese-Zinc (MnZn) ferrite designed for specific frequency ranges: * **High Permeability:** Ideal for achieving high inductance in small volumes. * **Frequency Range:** Optimized for applications up to approximately **400 kHz**. * **Low Losses:** Maintains efficiency in broadband transformers and telecommunications equipment. --- ### 4. Common Applications Due to its shielding properties (the "Pot" shape encloses the winding), the B65611-W-R30 is used in: 1. **Telecommunications:** Differential mode chokes and broadband transformers. 2. **Industrial Electronics:** High-stability inductors and resonant circuit filters. 3. **Proximity Sensors:** Used as the magnetic core for sensing heads due to its focused magnetic field. 4. **Power Supplies:** Small power transformers requiring low EMI (Electro-Magnetic Interference). --- ### 5. Mechanical Integration To use this part in a circuit, you typically require: * **A Pair of Cores:** Ferrite cores are usually sold as single pieces; two are needed to form a complete "Pot." * **Bobbin (Coil Former):** To hold the copper wire. * **Yoke/Clamps:** To hold the two core halves together under pressure.