The part number **RVR-4V331MG68UN-R2** refers to a specific Surface Mount (SMD) Aluminum Electrolytic Capacitor. This component is designed for high-density electronic circuits where space and reliability are critical. ### 1. Part Number Breakdown (Typical Naming Convention) Based on standard industry naming for the Elna/RVR series, the code breaks down as follows: | Code Segment | Description | Specific Value | | :--- | :--- | :--- | | **RVR** | Series Name | Low impedance, long life, SMD type | | **4V** | Rated Voltage | 4 Volts DC | | **331** | Capacitance Code | 330 $\mu$F (33 followed by 1 zero) | | **M** | Tolerance | $\pm$20% | | **G68** | Case Size Code | Typically 6.3mm diameter x 7.7mm height | | **UN** | Internal Code | Specialized electrolyte or coating info | | **R2** | Packaging | Tape & Reel (T/R) | --- ### 2. Key Technical Specifications These capacitors are generally used in power management and filtering applications. * **Type:** Aluminum Electrolytic (Surface Mount Design). * **Capacitance:** 330 microfarads ($\mu$F). * **Voltage Rating:** 4V (Surge voltage is usually ~5V). * **Temperature Range:** Typically $-55^\circ\text{C}$ to $+105^\circ\text{C}$. * **Life Endurance:** Usually rated for 2,000 hours at $105^\circ\text{C}$ (longer at lower temperatures). * **Impedance:** Low impedance, making it suitable for switching power supplies. --- ### 3. Physical Dimensions and Mounting | Feature | Specification | | :--- | :--- | | **Mounting Type** | Surface Mount (SMD / V-Chip) | | **Diameter** | 6.3 mm | | **Height** | 7.7 mm | | **Footprint** | Square base with two soldering terminals | --- ### 4. Common Applications Because of the **Low Impedance** and **4V** rating, this part is commonly found in: * **Digital Logic Power Rails:** Filtering 1.8V, 2.5V, or 3.3V power lines. * **Computer Peripherals:** Motherboards, SSD controllers, and GPU power stages. * **Telecommunications:** DC-DC converters and signal noise reduction. * **Portable Electronics:** Where a low profile and automated assembly (SMT) are required.