The **30LVD28-R** is a high-voltage, ceramic disc capacitor manufactured by **Vishay Cera-Mite**. It is part of the "Lower Voltage" (LVD) series, specifically designed for applications requiring high dielectric strength and reliability. --- ### 1. Technical Specifications The following table summarizes the key electrical and physical characteristics of the 30LVD28-R: | Parameter | Specification | |:---|:---| | **Capacitance Value** | 2,800 pF (0.0028 µF) | | **Voltage Rating** | 3,000 VDC (3 kV) | | **Dielectric Material** | Y5U (Class 2 Ceramic) | | **Tolerance** | ±20% | | **Mounting Type** | Through-Hole | | **Lead Configuration** | Radial Leaded | | **Operating Temperature** | -30°C to +85°C | --- ### 2. Key Features * **High Voltage Stability:** Rated for 3kV, making it suitable for high-stress power environments. * **Compact Design:** The ceramic disc construction allows for a high capacitance-to-volume ratio. * **Flame Retardant:** Encapsulated in flame-retardant epoxy resin (UL 94 V-0 rated). * **Y5U Dielectric:** This is a general-purpose dielectric that offers high volumetric efficiency, though it has a non-linear temperature coefficient. --- ### 3. Common Applications Due to its high voltage rating and ceramic properties, this part is typically used in the following circuits: 1. **Power Supplies:** Used as a snubber capacitor to protect switching transistors from voltage spikes. 2. **CRT Displays:** High-voltage filtering in older monitor technology or specialized industrial displays. 3. **Lighting Ballasts:** Voltage regulation in HID or fluorescent lighting systems. 4. **Coupling/Decoupling:** Blocking DC components while allowing high-frequency AC signals to pass in high-voltage lines. --- ### 4. Part Number Breakdown The nomenclature for the Vishay LVD series generally follows this logic: ```text 30 - Voltage Rating (30 = 3,000 VDC) LVD - Series Code (Low Voltage Disc / High Voltage Ceramic) 28 - Capacitance Code (2800 pF) -R - RoHS Compliant / Revision Indicator ```