The engineer consults the derating chart and discovers that above 30°C, the PSU loses 2 Watts of capacity for every degree of temperature increase.
Let’s solve a real problem: You have 8 current-carrying THHN 90°C copper wires (10 AWG) in a conduit on a rooftop where ambient temp reaches 45°C. derating chart
A typical chart for a power resistor often reveals three distinct zones: The engineer consults the derating chart and discovers
The Horizontal Axis (X-Axis): This usually represents the ambient temperature. It starts at a standard room temperature (often 25°C or 40°C) and moves toward extreme heat. It starts at a standard room temperature (often
A typical derating chart consists of a graph with the following elements:
Thermal Runaway: The component gets hotter, which increases resistance, which generates even more heat until the device melts or catches fire.