The **SMS-R680** is a specific part number typically associated with **SMD (Surface Mount Device) Power Inductors**. These components are critical in power management circuits, particularly for DC-DC converters and voltage regulation modules. Below is a breakdown of the electronic specifications, characteristics, and typical applications for this part. --- ### 1. Technical Specifications Inductors like the R680 are categorized by their physical size and their electrical properties (Inductance, DC Resistance, and Current Rating). | Parameter | Specification (Typical) | Notes | | :--- | :--- | :--- | | **Inductance** | 0.68 µH | "R68" denotes 0.68 microhenries. | | **Tolerance** | ±20% (M) | Common for power inductors. | | **DCR (DC Resistance)** | ~1.5mΩ to 5.0mΩ | Varies by manufacturer (e.g., Sumida, Vishay). | | **Saturation Current** | 10A - 25A | Depends on the physical footprint size. | | **Operating Temp** | -40°C to +125°C | Standard industrial grade. | | **Construction** | Shielded / Magnetic Metal Powder | Reduces EMI (Electromagnetic Interference). | --- ### 2. Key Characteristics * **Low Profile:** The "SMS" series usually refers to a square-shaped, low-profile package designed for automated surface mount assembly. * **High Current Handling:** Due to the metal composite or ferrite core, these parts can handle high peak currents without the inductance dropping significantly (Saturation). * **Magnetically Shielded:** The core structure is designed to contain the magnetic field, which is vital for preventing interference with nearby sensitive components on a PCB. * **Low Core Loss:** Optimized for high-frequency switching, reducing heat generation in power supplies. --- ### 3. Common Applications The SMS-R680 is frequently found in high-performance electronics where space is limited but power demands are high: 1. **Motherboards & GPUs:** Used in the VRM (Voltage Regulator Module) phases to provide stable power to CPUs/GPUs. 2. **Laptops & Tablets:** Ideal for compact DC-DC converter circuits. 3. **Network Equipment:** Used in routers and switches for point-of-load (POL) power conversion. 4. **LED Drivers:** Used to manage current flow in high-brightness LED applications. --- ### 4. Part Number Decoding Usually, the part number follows this logic: * **SMS:** Series designation (Surface Mount Shielded). * **R680:** Inductance value. * `R` acts as a decimal point. * `R68` = 0.68. * The `0` at the end often acts as a multiplier or placeholder.