What is the CTI for FR4?
Andrew Thornton What is the CTI for FR4?
175
The default CTI value for FR4 is 175 and goes up to 600 on special materials. The CTI / PTI value is determined using standard test methods.
What is CTI value in PCB?
PCB CTI Value The comparative tracking index value depicts the resistance of the printed circuit board materials against ecological influences like moisture and dirt. This is well explained in terms of when the value is higher, then the higher the material is, the more resistant.
What is Tg170?
The material never burns but always softens within specific temperature ranges. It is this temperature tipping point that gets inferred as TG or the glass transition temperature. Tg170 implies the fr4 tg170 material (making the epoxy) withstanding temperatures of up to 170 degrees Celsius during lamination.
What is high Tg PCB material?
As usual, made with Tg ≥ 170℃ PCB material, which is called a high Tg printed circuit board. With the rapid development of the electronics industry, high Tg material is widely used in computers, communication equipment, precise apparatus, and instruments, etc….High-TG PCB:
| Feature | Capability |
|---|---|
| Lead time | 2-3 days |
What is CTI rating?
The Comparative Tracking Index (CTI) is the maximum voltage, measured in volts, at which a material withstands 50 drops of contaminated water without tracking. Tracking is defined as the formation of conductive paths due to electrical stress, humidity, and contamination.
What is High Voltage PCB?
1.1 What is a high voltage PCB? In short, any PCB that runs at a much higher voltage than the normal rail voltage can call a medium or high voltage PCB. Boards like mains powered power supplies, Inverters, EV chargers, etc. fall into this category.
What is CTI in material?
Tracking Index Test. The Comparative Tracking Index (CTI) is the maximum voltage, measured in volts, at which a material withstands 50 drops of contaminated water without tracking. Tracking is defined as the formation of conductive paths due to electrical stress, humidity, and contamination.
How much heat can a PCB take?
1. Component Malfunction Causing Dissipation. One common cause of high heat in a PCB is that one component within the PCB malfunctions and dissipates, failing to generate the amount of power it typically produces. When this happens, the surrounding components have to generate more power to compensate.
What is FR-4 TG130?
FR-4 TG130 TG stands for Glass Transition and is the temperature at which a PCB substrate changes from a rigid structure to a viscous one. Measured in Celsius, TG130 simply means that 130 degrees Celsius is the temperature range which would cause FR-4 TG 130 will transition to its softened state.
What is FR-4 PCB?
FR-4 is a common material for printed circuit boards (PCBs). A thin layer of copper foil is typically laminated to one or both sides of an FR-4 glass epoxy panel. These are commonly referred to as copper clad laminates. The copper thickness or copper weight can vary and so is specified separately.
What is PCB temperature?
Medium Tg PCBs generally have a maximum temperature of above 150°C while high Tg PCBs are rated above 170°C. PCBs with higher Tg value also demonstrate better moisture and chemical resistance, as well as sturdier physical structure in heat. Unless specified, manufacturers will use low Tg PCB for fabrication.
