Does the diode technical documentation specify the operating temperature range?
Except for a few products (1SS389, CES520), there is no description of operating temperature for individual semiconductor elements such as diodes. This is because discrete semiconductors such as diodes differ from ICs in that the heat generated in the elements varies depending on the customer's usage conditions. Use the operating temperature so that the junction temperature during use is less than the junction temperature Tj listed in the absolute maximum ratings.
As a simple judgment, calculate the loss from the voltage and current applied to the diode and make sure that this value is less than the absolute maximum rated power dissipation PD. If the calculated loss is close to the power dissipation PD, if the operating temperature is higher than 25°C, or if the switching speed is fast, please calculate with reference to the following application notes and decide whether to change elements with higher PD.
Application note：Basics of Diodes (Power Losses and Thermal Design)
Basics of Diodes (Power Losses and Thermal Design) (PDF:867KB)
Although use at the maximum channel temperature Tch (max) or less is possible, reliability such as deterioration, life span, etc. must be considered. Degradation, such as performance degradation, accelerates as channel temperature rises.
In order to maintain stable performance for a long period of time on your equipment, please design by derating for the maximum channel temperature Tch (max).
For information on derating, please refer to the following document.
Reliability Information ：Handling Precautions and Requests
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