The **RVR-4V331MF80U-R2** is a surface-mount (SMD) Aluminum Electrolytic Capacitor. It is designed for general-purpose electronic filtering, decoupling, and energy storage in compact circuits. --- ### 1. Key Technical Specifications Based on the standard nomenclature for this part number, the specifications are as follows: | Parameter | Specification | Details | | :--- | :--- | :--- | | **Capacitance** | 330 µF | Rated storage capacity | | **Voltage (WV)** | 4.0 VDC | Maximum working voltage | | **Tolerance** | ±20% (M) | Standard industry tolerance | | **Case Size** | Φ6.3 x 7.7 mm | F80 Case Code (Diameter x Height) | | **Temperature** | -40°C to +85°C | Operating range | | **Mounting Type** | SMD (V-Chip) | Surface mount technology | | **Packaging** | Tape & Reel (R2) | High-speed automated assembly | --- ### 2. Breakdown of the Part Number The alphanumeric code contains specific manufacturing data: * **RVR**: Series prefix (typically indicating standard life, low profile, or specific electrolyte type). * **4V**: Rated voltage (4 Volts). * **331**: Capacitance code ($33 \times 10^1$ in picofarads, which equals **330 µF**). * **M**: Tolerance code ($\pm 20\%$). * **F80**: Physical dimension code (Standardized size for Φ6.3mm). * **U**: Dielectric/Internal code (Manufacturer specific). * **R2**: Packaging code (13-inch or 7-inch Reel). --- ### 3. Applications and Usage This specific capacitor is commonly found in low-voltage digital circuits. Due to its 4V rating, it is strictly used on power rails that do not exceed 3.3V (to maintain a safety margin). * **Power Management:** Filtering noise on 1.2V, 1.8V, or 2.5V DC power lines. * **Consumer Electronics:** Found in tablets, laptops, and portable gaming devices. * **Decoupling:** Providing a local energy reservoir for microprocessors and high-speed ICs to prevent voltage drops. --- ### 4. Comparison: Electrolytic vs. Ceramic (MLCC) While MLCCs are smaller, a 330µF electrolytic like the RVR-4V331MF80U-R2 is used because: 1. **Cost:** Higher capacitance values are more cost-effective in electrolytic form than ceramic. 2. **Stability:** They do not suffer from "DC Bias," where the capacitance drops as voltage increases (a common issue with MLCCs).