Verification of the junction temperature (Tj) is required to determine whether or not this temperature is a problem.
In the case of the AC10DGM, the thermal resistance Rth(j-c) between the junction and the case is 1.8°C/W, so that at the ambient temperature of 45°C, the following Tj value is obtained when the measured temperature (Tc) is approximately 55°C:
Tj = 1.8 × Pd + 55
Please calculate Pd and check whether Tj is equal to or lower than the junction temperature of 125°C in the above equation.
|Zener Diodes for Surge Absorption|
|Diodes for Constant Voltage|