Electronic Glossary

TG (Glass transition temperature) is the point at which rising temperatures cause resin inside the solid base laminate to start to exhibit soft, plastic-like symptoms. This is expressed in degrees Celsius (°C). The temperature at which a polymer changes from …

What Is Thermal Conductivity?   Thermal Conductivity (Κ, λ, or κ.) is an important physical quantity in PCB measures the rate at which heat flows away from a heat source and towards cooler regions of the PCB assembly (PCBA). The …

What Is Thermal Management for PCBs?   Thermal Management is the ability to control the temperature of a PCB by means of technology based on thermodynamics and heat transfer. All electronic devices with printed circuit board (PCB), and circuitry generate …

What’s Thermal Pad in PCB? A Thermal Pad, also called Thermal Relief Pad, or simply Thermal, which is a PCB pad connected to a copper pour using a thermal connection. It looks like a normal pad with copper “spokes” (tracks) …

A Thermal Relief or Heat Relief is a type of circuit pad used at a location where there is a component pin or fan-out via that connects to a copper plane. The pad of a thermal relief is connected to …

What Is Thermal Resistance in PCB?   Thermal Resistance in printed circuit board (PCB) is a physical quantity and the reciprocal of the thermal conductivity (Er or Dk). The primary parameter that determines how well your board distributes and dissipates heat is …

What’s Thermal Stability in PCB?   Thermal Stability is defined as the ability of a PCB to resist breaking down under heat stress, and maintain stable characteristics in spite of increased temperature. The maximum use temperature is the suggested maximum …

In mechanics and thermodynamics, thermal stress is mechanical stress created by any change in temperature of a material. These stresses can lead to fracturing or plastic deformation depending on the other variables of heating, which include material types and constraints. …

What Are Thermal Vias?   Thermal Vias are simple plated through holes (PTHs) that located under a surface-mounted heat source component in a printed circuit board (PCB) that allow heat transfer. The vias establish a low thermal resistance path from …

What’s A Thermistor?   A Thermistor is a type of resistor whose resistance is strongly dependent on temperature, more so than in standard resistors. The word is a combination of thermal and resistor. The relationship between a thermistor’s temperature and …