Tg 130 PCB vs. Tg 150 PCB vs. Tg 170 PCB: What is the Difference?

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When it comes to printed circuit boards (PCBs), the term “Tg” is a measure of the glass transition temperature of the PCB material. In other words, it is the temperature at which the material undergoes a change in its physical properties, such as its dimensional stability and fragility. Tg is typically measured in degrees Celsius and is an important factor to consider when selecting a PCB for a particular application.

There are three common types of PCBs that are differentiated by their Tg values: Tg 130, Tg 150, and Tg 170. But what exactly is the difference between these three types, and how do you know which one is right for your application? In this blog post, we’ll explore the key differences between Tg 130, Tg 150, and Tg 170 PCBs and provide some guidance on how to choose the right one for your needs.

Overview of Tg 130, Tg 150, and Tg 170 PCBs

Tg 130 PCBs are made from materials with a Tg value of 130°C or lower. These PCBs are known for their low cost and good electrical conductivity, but they have limited thermal stability and are not suitable for use in high-temperature environments. Tg 130 PCBs are commonly used in consumer electronics and other low-temperature applications.

Tg 150 PCBs are made from materials with a Tg value between 130°C and 150°C. These PCBs offer improved thermal stability compared to Tg 130 PCBs, but they may have slightly lower electrical conductivity and may be more expensive to manufacture. Tg 150 PCBs are often used in industrial and automotive applications, as well as in some consumer electronics.

Tg 170 PCBs are made from materials with a Tg value of 170°C or higher. These PCBs have the highest thermal stability of the three types and are suitable for use in high-temperature environments. They may also have improved electrical performance and signal integrity, but they are typically the most expensive of the three types. Tg 170 PCBs are used in a wide range of applications, including aerospace, defense, and medical devices.

Comparison of Tg 130, Tg 150, and Tg 170 PCBs

Now that we’ve provided a general overview of Tg 130, Tg 150, and Tg 170 PCBs, let’s delve deeper into the key differences between these three types.

Materials used

The materials used to manufacture Tg 130, Tg 150, and Tg 170 PCBs vary based on their Tg values. Tg 130 PCBs are typically made from epoxy-glass laminates, while Tg 150 and Tg 170 PCBs may be made from a variety of materials, including polyimide, BT (bismaleimide triazine), and FR4 (fire-retardant).

Thermal stability

As mentioned previously, Tg 130 PCBs have limited thermal stability and are not suitable for use in high-temperature environments. Tg 150 PCBs offer improved thermal stability compared to Tg 130 PCBs, but Tg 170 PCBs have the highest thermal stability of the three types. This makes Tg 170 PCBs the best choice for applications that require reliable performance in high-temperature environments.

Performance characteristics

In terms of electrical conductivity and signal integrity, Tg 130 PCBs generally have the best performance of the three types. However, they may not be suitable for applications that require good thermal stability. 

Cost

One of the key differences between Tg 130, Tg 150, and Tg 170 PCBs is their cost. Tg 130 PCBs are generally the least expensive of the three types due to their low Tg value and the materials used to manufacture them. Tg 150 PCBs may be slightly more expensive due to their improved thermal stability, while Tg 170 PCBs are typically the most expensive due to their high Tg value and the materials used to manufacture them.

Choosing the Right Tg PCB for Your Application

So, how do you know which Tg PCB is right for your application? Here are a few factors to consider:

  • Temperature: If your application requires the PCB to operate in a high-temperature environment, you’ll need to choose a Tg 170 PCB. If the environment is moderate or low, either a Tg 130 or Tg 150 PCB may be suitable.
  • Cost: If budget is a major concern, a Tg 130 PCB may be the most cost-effective option. However, keep in mind that these PCBs have limited thermal stability and may not be suitable for all applications.
  • Electrical performance: If electrical performance is a key consideration, a Tg 130 PCB may be the best choice due to its good electrical conductivity and signal integrity. However, if thermal stability is also a requirement, you’ll need to choose a Tg 150 or Tg 170 PCB.
  • Industry standards: Some industries have specific standards or regulations that dictate the type of PCB that must be used. For example, the aerospace industry often requires the use of Tg 170 PCBs due to their high thermal stability.

Conclusion

In summary, Tg 130, Tg 150, and Tg 170 PCBs are differentiated by their glass transition temperature and the materials used to manufacture them. Tg 130 PCBs are the least expensive and have good electrical conductivity, but limited thermal stability. Tg 150 PCBs offer improved thermal stability and may be suitable for moderate-temperature environments, while Tg 170 PCBs have the highest thermal stability and are suitable for high-temperature environments. When choosing a Tg PCB for your application, consider factors such as temperature, cost, electrical performance, and industry standards.

PCBA Tech

PCBA Tech