SUMMARY
The realistic breakdown value for the electric field in air is commonly cited as 3 x 10^6 V/m in textbooks, while various online sources suggest a lower value of 1 x 10^6 V/m. The presence of dielectrics, such as FR4, increases the breakdown voltage, which can be calculated using the formula V=ε E*d, where ε represents the dielectric constant. Breakdown voltage is influenced by factors such as pressure, temperature, and humidity, with significant variations noted for different geometries like sharp points versus spheres. For those serious about high voltage applications, the book "Reference Data for Radio Engineers, fifth edition" is highly recommended for its comprehensive graphs on breakdown voltage.
PREREQUISITES
- Understanding of electric field concepts and breakdown voltage
- Familiarity with dielectric materials, specifically FR4
- Knowledge of the Paschen Curve and its implications on breakdown voltage
- Basic grasp of humidity's effect on electrical properties
NEXT STEPS
- Research the Paschen Curve and its application in breakdown voltage calculations
- Study the dielectric properties of FR4 and its impact on electrical insulation
- Explore the "Reference Data for Radio Engineers, fifth edition" for detailed breakdown voltage graphs
- Investigate UL standards related to breakdown voltage for specific products
USEFUL FOR
Electrical engineers, high voltage specialists, and product designers needing to understand breakdown voltage in air and dielectric materials like FR4.