The **30LVD20-R** is a high-voltage ceramic disc capacitor manufactured by Vishay Cera-Mite. It is part of the 30LVD series, specifically designed for low-voltage power supply and high-voltage isolation applications. ### 1. Technical Specifications The part number follows a specific nomenclature that defines its electrical characteristics: | Parameter | Specification | | :--- | :--- | | **Capacitance** | 2000 pF (0.002 µF) | | **Voltage Rating** | 3000 Vdc (3 kV) | | **Tolerance** | ±20% (Standard) | | **Dielectric Material** | Y5R (Class 2 Ceramic) | | **Mounting Type** | Through-hole (Radial Leads) | | **Operating Temperature** | -30°C to +85°C | --- ### 2. Key Features * **High Voltage Stability:** Capable of handling surges and steady-state voltages up to 3000V. * **Flame Retardant:** Encapsulated in a flame-retardant epoxy resin (UL 94 V-0). * **Radial Leaded:** Designed for traditional PCB mounting with copper-clad steel leads. * **RoHS Compliant:** The "-R" suffix typically denotes compliance with RoHS environmental standards. --- ### 3. Common Applications Due to its high voltage rating and specific dielectric properties, the 30LVD20-R is primarily used in: 1. **Power Supplies:** Used for input filtering and snubber circuits. 2. **Monitors and TVs:** Found in horizontal deflection circuits. 3. **Lighting Ballasts:** Used for transient suppression and high-frequency filtering. 4. **Voltage Multipliers:** Often found in circuits requiring voltage doubling or tripling. --- ### 4. Decoding the Part Number The prefix and suffix tell the story of the component's physical build: * **30LVD:** Series designation (High Voltage Disc). * **20:** Represents the capacitance value (20 x 10^2 pF = 2000 pF). * **-R:** Indicates RoHS compliance. --- ### 5. Equivalent/Alternative Parts If this specific part is unavailable, engineers often look for these alternatives with similar 3kV/2nF specs: * **Murata:** DEHC33F202KA3B * **TDK:** CD Series high-voltage capacitors * **KEMET:** C900 series (though physical dimensions may vary) ---