The **30LVSD40-R** is a high-voltage, radial-leaded ceramic disc capacitor manufactured by **Vishay Cera-Mite**. It is part of the 30LVS series, specifically designed for low-voltage applications requiring high reliability and stability. --- ### 1. Key Technical Specifications | Feature | Specification | |:---|:---| | **Capacitance Value** | 0.04 µF (40,000 pF) | | **Voltage Rating** | 3000 VDC (3 kV) | | **Tolerance** | ±20% | | **Temperature Coefficient** | Y5S (Stable dielectric) | | **Mounting Type** | Through-Hole (Radial Leads) | | **Operating Temperature** | -30°C to +85°C | ### 2. Physical Characteristics * **Encapsulation:** Flame-retardant epoxy resin (conforms to UL 94 V-0). * **Lead Style:** Straight or kinked copper wires with tin plating. * **Construction:** Consists of a ceramic disc which is silver-plated on both sides. ### 3. Core Applications The 30LVSD40-R is typically used in circuits where high voltage spikes or steady-state high voltages are present. Common use cases include: * **Power Supplies:** Filtering high-frequency noise in switch-mode power supplies (SMPS). * **TV/Monitors:** Horizontal resonance circuits and high-voltage coupling. * **Lighting Ballasts:** Used in electronic ballasts for gas discharge lamps. * **Snubber Circuits:** Protecting semiconductors (IGBTs/MOSFETs) from voltage transients. --- ### 4. Part Number Breakdown | Segment | Meaning | |:---|:---| | **30** | Series Identifier (Vishay Cera-Mite) | | **LVS** | Low Voltage Series (Relative to ultra-high-voltage utility caps) | | **D40** | Capacitance code (40 indicates value) | | **-R** | RoHS Compliant (Lead-free) |