The **30LVD50-R** is a high-voltage, ceramic disc capacitor manufactured by **Vishay Cera-Mite**. It is part of the "Low Voltage" (LV) series, though in this context, "low" is relative to ultra-high voltage power grid components; it is specifically designed for industrial and power supply applications. --- ### ## Technical Specifications Below are the primary electrical and physical characteristics of the 30LVD50-R: | Parameter | Specification | |:--- |:--- | | **Capacitance** | 0.005 µF (5,000 pF) | | **Voltage Rating** | 3,000 VDC (3 kV) | | **Tolerance** | ± 20% | | **Dielectric Material** | Y5U (Class II Ceramic) | | **Mounting Type** | Through-Hole | | **Termination Style** | Radial Leaded | | **Operating Temp Range** | -30°C to +85°C | --- ### ### Key Features and Composition 1. **Dielectric (Y5U):** This is a Class II ceramic material. It offers a high dielectric constant, allowing for high capacitance in a small physical size. However, the capacitance varies significantly with temperature (-56% to +22% over the range). 2. **Construction:** The part consists of a ceramic disc that is silver-plated on both sides. It is encapsulated in a flame-retardant epoxy resin (UL 94 V-0 rated) to prevent arcing and protect against moisture. 3. **Lead Configuration:** Typically features "kinked" or straight tinned copper leads, designed for easy PCB insertion and soldering stability. --- ### ### Common Applications Due to its high voltage rating and compact disc shape, the 30LVD50-R is commonly found in: * **Power Supplies:** Used as a decoupling or bypass capacitor in high-voltage circuits. * **CRT Displays:** Legacy monitors and televisions often use these in horizontal deflection circuits. * **Lighting Ballasts:** High-intensity discharge (HID) or fluorescent lighting circuits. * **Voltage Multipliers:** Used in stages to ramp up DC voltage. * **Snubber Circuits:** To suppress voltage spikes across switching components (MOSFETs/IGBTs). --- ### ### Equivalent Part Number Logic If you are looking for replacements or cross-references, the part number breaks down as follows: * **30:** Usually refers to the voltage family (30 = 3kV). * **LV:** Series designation (Low Voltage/Industrial). * **D50:** Capacitance code (50 = 5,000 pF / 0.005 µF). * **R:** Packaging/Lead style or RoHS compliance indicator.