TG170 PCBs

On a circuit board, Tg denotes the maximum temperature rating of the base laminate material before its physical properties begin to change. A higher Tg value means the board can handle greater thermal stress without warping, expanding, or losing dielectric integrity. This is especially important in multilayer boards where thermal cycles during soldering and operation can stress the laminate significantly.

Standard FR4 has a glass transition temperature of approximately 130–140°C (referred to as Tg130 or Tg140). High-Tg FR4 variants are specially formulated to achieve higher ratings: Tg150 (150°C), Tg170 (170°C), and Tg180 (180°C or above). TG170 FR4 is a widely adopted upgrade for applications requiring improved thermal stability beyond what standard FR4 can reliably provide.

TG170 PCB material is a high-performance FR4 laminate with a glass transition temperature of 170°C. Compared to standard FR4, it offers better dimensional stability under thermal cycling, lower moisture absorption, improved mechanical rigidity, and enhanced flame resistance. It supports lead-free (RoHS-compliant) soldering processes and is well-suited for multilayer board constructions used in aerospace, automotive, medical, and industrial control applications.

Choose TG170 over standard FR4 when your application involves sustained high operating temperatures, repeated thermal cycling, lead-free soldering processes, or densely packed multilayer designs. Standard FR4 (Tg130–140°C) is sufficient for most consumer electronics, but TG170 is recommended for industrial control systems, automotive electronics, military hardware, and medical devices where thermal margin and long-term reliability are critical.

Yes. TG170 PCBs are specifically designed to be compatible with lead-free (RoHS-compliant) soldering processes, which typically require peak reflow temperatures of 245–260°C. The higher glass transition temperature provides the necessary thermal headroom to withstand these elevated process temperatures without delamination or dimensional distortion, making TG170 a preferred substrate choice for RoHS-compliant manufacturing environments.

Yes. TG170 material is fully compatible with multilayer PCB constructions, including 4, 6, 8, or more layer configurations. The improved thermal and mechanical stability of TG170 laminate is particularly beneficial in multilayer boards, where inner layer registration and laminate integrity must be maintained through multiple lamination and drilling cycles. Impedance control and high-speed signal routing are also fully supported.