The **3F3-R17** is a high-performance ferrite material produced by **Ferroxcube**, primarily used in the manufacturing of magnetic cores for inductors, transformers, and suppression components. It is specifically optimized for high-frequency power conversion applications. ### 1. Technical Specifications The following table summarizes the key electrical and physical properties of the 3F3 material: | Property | Value | Unit | | :--- | :--- | :--- | | **Initial Permeability ($\mu_i$)** | $\approx$ 2000 | - | | **Saturation Flux Density ($B_s$)** | $\approx$ 440 (at 25°C) | mT | | **Frequency Range** | 0.1 to 1.0 | MHz | | **Curie Temperature ($T_c$)** | $> 200$ | °C | | **Resistivity ($\rho$)** | $\approx$ 2 | $\Omega \cdot$m | --- ### 2. Core Material Characteristics The "3F3" designation refers to the specific chemical composition of the Manganese-Zinc (MnZn) ferrite. * **Low Core Losses:** It is designed to minimize energy dissipation as heat, particularly in the 200 kHz to 500 kHz range. * **Temperature Stability:** The material maintains a stable magnetic permeability across a wide operating temperature range, preventing thermal runaway in power supplies. * **High Saturation:** This allows the component to handle higher currents before the magnetic field levels off, which is critical for miniaturizing power electronics. --- ### 3. Common Applications The 3F3-R17 material is typically shaped into various core geometries (like E-cores, Toroids, or RM-cores) for use in: 1. **DC-DC Converters:** High-efficiency power transformation in telecommunications and automotive electronics. 2. **Switched-Mode Power Supplies (SMPS):** Used in the main transformer to handle high-frequency switching. 3. **EMI Suppression:** Acting as a filter to block high-frequency noise in electronic circuits. 4. **Resonant Inductors:** Used in LLC resonant converters due to its low loss characteristics at high frequencies. --- ### 4. Identification and Part Numbering In the part number **3F3-R17**: * **3F3:** Indicates the Manganese-Zinc ferrite material grade. * **R17:** Usually refers to a specific physical dimension or a revision code related to the core geometry (e.g., a specific rod or ring dimension).