The **30LVD27-R** is a specific type of ceramic disc capacitor, typically manufactured by companies like Vishay Cera-Mite. It is designed for high-voltage applications and belongs to the low-dissipation factor family. --- ### 1. Technical Specifications Below are the primary technical parameters for the 30LVD27-R: | Parameter | Value / Description | |:---|:---| | **Capacitance** | 0.027 µF (27,000 pF) | | **Voltage Rating** | 3000 VDC (3 kV) | | **Tolerance** | Usually ±20% (M) | | **Dielectric Material** | Ceramic (Class 2) | | **Operating Temp Range** | -30°C to +85°C | | **Mounting Type** | Through-hole (Radial Leads) | --- ### 2. Part Number Breakdown Understanding the nomenclature helps identify the component's characteristics: * **30:** Represents the voltage rating (3000 Volts). * **LVD:** Series code indicating "Low Voltage Distortion" or specific high-voltage ceramic characteristics designed for power supplies. * **27:** Significant digits of the capacitance value in picofarads (27). * **R:** Often denotes the lead configuration or RoHS compliance status. --- ### 3. Key Applications Because of its high voltage rating and ceramic construction, this part is commonly found in: 1. **Switch-Mode Power Supplies (SMPS):** Used for snubber circuits to protect against voltage spikes. 2. **CRT Monitors/TVs:** Historical use in high-voltage deflection circuits. 3. **Lighting Ballasts:** Used in the starting and stabilization circuits of high-intensity lamps. 4. **Coupling/Decoupling:** Blocking DC while allowing high-frequency AC signals to pass in high-voltage environments. --- ### 4. Characteristics & Behavior * **Self-Healing:** Ceramic capacitors do not have "self-healing" properties like film capacitors; if the dielectric punctures due to overvoltage, the part usually shorts. * **Temperature Stability:** As a Class 2 ceramic, the capacitance may vary significantly with temperature and applied voltage. * **Lead Spacing:** Being a radial disc, it requires specific PCB hole spacing (typically around 9.5mm to 10mm for 3kV parts).