The **RPS103-R680E** is a high-performance **Surface Mount Device (SMD) Power Inductor**. These components are critical in modern power electronics for energy storage and noise filtering. --- ### 1. Technical Specifications The part number follows a specific nomenclature used by manufacturers (like Sumida or similar magnetic component specialists). | Parameter | Specification | Description | | :--- | :--- | :--- | | **Inductance** | 68 µH | Measured at a specific frequency (usually 100kHz). | | **Tolerance** | ±20% (M) | Standard deviation for power inductors. | | **DCR (Max)** | ~0.15 - 0.25 Ω | DC Resistance; determines power loss via heat. | | **Saturation Current** | ~1.5A - 2.5A | The point where inductance drops by a specific % (e.g., 30%). | | **Case Size** | 103 (10x10x3 mm) | Physical dimensions of the shielded package. | --- ### 2. Core Features & Construction The RPS103 series is designed for efficiency and electromagnetic compatibility (EMC). * **Shielded Construction:** The inductor is encased in a magnetic shield. This minimizes electromagnetic interference (EMI) with neighboring components on the PCB. * **Low Profile:** The "3" in "103" typically refers to a 3.0mm height, making it suitable for compact electronics like laptops or industrial tablets. * **Ferrite Core:** Uses a high-permeability ferrite material to handle high-frequency switching without significant core losses. --- ### 3. Application Use Cases This specific value (68µH) and form factor are commonly found in the following circuits: 1. **DC-DC Converters:** Acts as the energy storage element in Buck (step-down) or Boost (step-up) converters. 2. **Power Supply Filtering:** Used in "LC" filters to smooth out voltage ripples from switching power supplies. 3. **Battery Management Systems (BMS):** Manages current flow and stabilizes voltage during charging/discharging cycles. 4. **LED Drivers:** Provides constant current regulation for high-brightness LED arrays. --- ### 4. Decoding the Part Number | Segment | Meaning | | :--- | :--- | | **RPS** | Series designation (Shielded Power Inductor). | | **103** | Physical footprint (10mm x 10mm) and height (~3mm). | | **R680** | Inductance value. "680" = 68 x 10^0 = **68 µH**. | | **E** | Packaging/Tolerance code (often refers to RoHS compliance or specific taping). | ---