## Technical Overview: 30LVD47-R The **30LVD47-R** is a high-voltage ceramic disc capacitor, primarily manufactured by **Vishay Cera-Mite**. It is part of the 30LVD series, which is specifically designed for AC line applications where high reliability and specific capacitance values are required. --- ### 1. Key Technical Specifications | Parameter | Specification Details | | :--- | :--- | | **Component Type** | Ceramic Disc Capacitor | | **Series** | 30LVD (Low Voltage/High Performance Line) | | **Capacitance Value** | 0.047 µF (47,000 pF) | | **Voltage Rating** | 300 VAC (RMS) | | **Dielectric Material** | Y5V (General purpose, high dielectric constant) | | **Tolerance** | ±20% (Standard for this series) | | **Mounting Type** | Through-Hole | --- ### 2. Physical Characteristics * **Coating:** Typically encapsulated in a flame-retardant epoxy resin (meeting UL 94 V-0 standards). * **Lead Style:** Radial leads, usually available in straight or kinked configurations. * **Marking:** The part is marked with the capacitance code (473), voltage, and manufacturer logo. --- ### 3. Applications and Usage This specific capacitor is engineered for electronic circuits that require "across-the-line" filtering or interference suppression. Common use cases include: 1. **EMI/RFI Filtering:** Reducing electromagnetic interference in consumer electronics. 2. **Power Supplies:** Used in the input stages of switched-mode power supplies (SMPS). 3. **Appliance Controls:** Protecting sensitive control boards from voltage transients. 4. **Lighting Ballasts:** Filtering noise in electronic ballast circuits. --- ### 4. Naming Convention Breakdown The part number can be decoded as follows: * **30LVD:** The product series designation (Vishay Cera-Mite). * **47:** The significant digits of the capacitance value. * **-R:** Often signifies compliance with **RoHS** (Restriction of Hazardous Substances) standards. ---