Skip to content

Dissipation Factor - Definition, Measurement, Variables

Mallory McGuinness-Hickey September 12, 2023

 

Dielectric materials are crucial in various industries and applications, serving as insulators, substrates, or capacitors. One important characteristic often evaluated in dielectric materials is their dissipation factor. The dissipation factor, also known as the loss tangent or tan δ, is a vital parameter that measures the dielectric losses in electrical systems and components. It quantifies the energy dissipated as heat when an alternating current (AC) signal passes through an insulating material or a capacitor.

 

Why is Dissipation Factor Important?

This property provides valuable insight into the performance of dielectric materials. It measures the efficiency with which a dielectric material dissipates energy in the form of heat when subjected to an alternating current (AC) or high-frequency signal.

By analyzing this value, engineers can detect potential issues such as insulation breakdown, heat generation, and power loss, enabling them to effectively design and optimize electrical systems. Whether in high-frequency applications, power electronics, or telecommunications, the dissipation factor assists in selecting the appropriate materials, reducing energy loss, and enhancing electrical equipment's overall efficiency.
A high dissipation factor can indicate potential problems such as inefficient energy transfer or excessive heat generation in dielectric materials. By assessing this data, engineers can determine if a material is suitable for a specific application or needs replacing.

Measurement Techniques 

The dissipation factor is calculated by dividing the loss tangent of a dielectric material by its capacitance. The loss tangent is the ratio of the dissipated power to the stored energy in the material. There are several ways to determine the dissipation factor of various materials accurately. Professionals can use these techniques to obtain precise data and evaluate the performance and reliability of materials.

Bridge Method

The bridge method is a common measurement technique. It uses a bridge circuit consisting of resistors, capacitors, and inductors. By balancing the bridge, engineers can determine the material's dissipation factor under test.

Parallel-Plate Method

The parallel-plate method is another popular technique. It involves placing the material between two parallel plates and applying an alternating voltage across them. The dissipation factor is determined by measuring the power loss in the material.

Guard-Ring Method

The guard-ring method is a technique that minimizes the effects of stray capacitance during measurement. It involves placing a guard ring around the measurement electrodes to prevent current leakage due to the stray capacitance. This method helps to improve accuracy.

Variables Affecting Dissipation Factor

Several factors can influence the dissipation factor, affecting the efficiency and performance of electrical systems. Engineers and designers can optimize electrical systems by understanding and considering these factors, ensuring efficient and reliable operation.

Temperature

Temperature plays a significant role. As the temperature increases, molecular motion and energy losses increase, leading to a higher value. It is important to consider the temperature range in which a material will be used to ensure its dissipation factor remains within acceptable limits.

Dielectric Loss

Dielectric loss refers to the energy lost as heat due to the interaction between the electric field and the dielectric material. Materials with higher dielectric losses tend to have higher dissipation factors. Selecting materials with low dielectric loss can help minimize dissipation and improve system performance.

Frequency of Operation

The frequency of operation has a direct impact. At higher frequencies, the energy losses from the materials increase significantly, leading to an increased value. It is essential to consider the operating frequency when evaluating the dissipation factor of materials for electrical systems.

Resistance in the Circuit

The resistance in the circuit also contributes to the dissipation factor. Higher resistance causes larger energy losses and a greater value. Minimizing resistance through proper circuit design and selecting low-resistance components can help reduce the overall dissipation factor.

 Material Selection

The dissipation factor provides valuable insights into the electrical behavior of components, enabling manufacturers to make informed decisions regarding their application in different industries. This value is relevant across various industries heavily relying on electrical components. Industries such as telecommunications, power generation, aerospace, and automotive require strict adherence to quality standards to ensure optimal performance and safety.

Engineers can compare materials' performance at high frequencies by evaluating this property. This evaluation allows them to select materials with lower dissipation factors, which result in reduced energy losses and improved system efficiency. Furthermore, optimizing this property can also lead to increased power handling capabilities and improved reliability. If you are designing an electronic product and need help selecting a protective coating with beneficial electrical properties, please contact our team for a consultation. Or, you can learn more about thin film coating properties.

Additional Resources

The Difference Between
Video

The Difference Between "Hydrophilic and Hydrophobic" Coating Properties

Ensure Your Products Meet Market Claims With Our IP Ratings Checklist
Checklist

Ensure Your Products Meet Market Claims With Our IP Ratings Checklist

Learn About Corrosion Resistance From An Industry-Leading Engineer
Webinar

Learn About Corrosion Resistance From An Industry-Leading Engineer

Understand the Capabilities of Thin Film Coatings With Our Resource Page
Resource

Understand the Capabilities of Thin Film Coatings With Our Resource Page

Understand UL94 Rating - Testing, How to Choose a Material, and More
Blog

Understand UL94 Rating - Testing, How to Choose a Material, and More

Learn About HZO Parylene With Our Resource Page
Resource

Learn About HZO Parylene With Our Resource Page

What's the Difference Between Hydrophobic Coatings and Hydrophilic Coatings?
Blog

What's the Difference Between Hydrophobic Coatings and Hydrophilic Coatings?

Download HZO's Nanocoating Datasheet
Datasheet

Download HZO's Nanocoating Datasheet

Learn About the Costs of Corrosion
Infographic

Learn About the Costs of Corrosion

Understand How to Avoid Premature Product Failure
Webinar

Understand How to Avoid Premature Product Failure

Learn About Waterproof and Corrosion Resistant Coatings
Webinar

Learn About Waterproof and Corrosion Resistant Coatings

Why You Need HZO Protection For Your Electronics
Video

Why You Need HZO Protection For Your Electronics

HZO Coating Demo Video
Video

HZO Coating Demo Video

How To Design a Waterproof Product With IP Ratings
Blog

How To Design a Waterproof Product With IP Ratings

How To Prevent Devices From Overheating
Blog

How To Prevent Devices From Overheating

NEMA Enclosure Ratings vs IP Standards
Blog

NEMA Enclosure Ratings vs IP Standards

Arc Resistance - Concepts And Testing Explained
Blog

Arc Resistance - Concepts And Testing Explained

Dielectric Strength - Formula, Testing, Table of Values
Blog

Dielectric Strength - Formula, Testing, Table of Values

Dielectric Constant of Insulator - Materials, Formula, Table of Values
Blog

Dielectric Constant of Insulator - Materials, Formula, Table of Values

Military Standards for Safeguarding PCBAs
Blog

Military Standards for Safeguarding PCBAs

Tensile Strength at Yield - Testing, Definition, Material Selection
Blog

Tensile Strength at Yield - Testing, Definition, Material Selection

Elongation At Break - Definition, Testing, Material Selection
Blog

Elongation At Break - Definition, Testing, Material Selection

Elongation Yield Overview - Unit of Measurement, Data, Testing
Blog

Elongation Yield Overview - Unit of Measurement, Data, Testing

Young's Modulus of Polymers - Measurement, Calculation, Material Selection
Blog

Young's Modulus of Polymers - Measurement, Calculation, Material Selection

Dissipation Factor - Definition, Measurement, Variables
Blog

Dissipation Factor - Definition, Measurement, Variables

Volume Resistivity - Definition, Measurement, Implications For Product Design
Blog

Volume Resistivity - Definition, Measurement, Implications For Product Design

Biocompatible Coating Material
Blog

Biocompatible Coating Material

Transparent Polymers - Applications, Material Selection
Blog

Transparent Polymers - Applications, Material Selection

WVTR - Coating Standards, Testing, Material Selection
Blog

WVTR - Coating Standards, Testing, Material Selection

What is the Index of Refraction? Measurement, Definition & More
Blog

What is the Index of Refraction? Measurement, Definition & More

What is Thermal Conductivity? Explanation, Measurement, Uses
Blog

What is Thermal Conductivity? Explanation, Measurement, Uses

Polymer Glass Transition Temperature – Material Properties, Impact
Blog

Polymer Glass Transition Temperature – Material Properties, Impact

What is Coefficient of Linear Expansion? Formula, Units & More
Blog

What is Coefficient of Linear Expansion? Formula, Units & More

Prevent Electronic Failure Webinar
Webinar

Prevent Electronic Failure Webinar

Safeguarding with Nanocoatings Webinar
Webinar

Safeguarding with Nanocoatings Webinar