The **FPT705-230-R** is a high-performance, shielded inductor part of the FPT705 series manufactured by **Eaton (formerly Cooper Bussmann/Coiltronics)**. These components are specifically designed for high-frequency, high-current power applications. ### 1. Key Technical Specifications The part number suffix "-230-R" defines its specific electrical characteristics: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.23 µH (Microhenries) | | **Tolerance** | ±10% | | **DCR (Direct Current Resistance)** | 0.44 mΩ (Max) | | **Rated Current (Irms)** | 35 A | | **Saturation Current (Isat)** | 48 A | | **Operating Temperature** | -40°C to +125°C | | **Mounting Type** | Surface Mount (SMD) | --- ### 2. Physical Characteristics * **Construction:** It features a ferrite core material with a "Flat-Pac" (FPT) geometry. This low-profile design is optimized for high power density. * **Shielding:** The inductor is magnetically shielded, which minimizes Electromagnetic Interference (EMI) with surrounding components. * **Terminals:** Lead-free and RoHS compliant (indicated by the **-R** suffix). * **Dimensions:** Approximately 7.0mm x 7.0mm x 4.8mm. --- ### 3. Electronic Functionality The FPT705-230-R serves several critical roles in an electronic circuit: 1. **Energy Storage:** In switching regulators, it stores energy in its magnetic field during the "on" cycle and releases it during the "off" cycle. 2. **Ripple Filtering:** It smoothes out the current ripples in DC-to-DC converters, providing a stable voltage to sensitive components like CPUs or GPUs. 3. **High-Current Handling:** Due to its extremely low DCR (0.44 mΩ), it experiences very little power loss (heat) even when carrying currents up to 35 Amps. --- ### 4. Common Applications Because of its high saturation current and low profile, it is typically found in: * **Voltage Regulator Modules (VRMs):** Used in servers and desktop computers. * **Multi-phase Buck Converters:** For powering high-end processors. * **Point-of-Load (POL) Converters:** Distributed power systems in telecommunications. * **Graphic Cards:** Managing power for high-performance GPUs. --- ### 5. Part Number Breakdown ```text FPT 705 - 230 - R | | | | | | | └── RoHS Compliant | | └───────── Inductance (230 = 0.23µH) | └───────────────── Physical Size/Series └────────────────────── Family Name (Flat-Pac) ```