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AN10384
Triacs: How to calculate power and predict Tjmax
Rev. 01 — 10 August 2005 Application note
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Keywords Triac, Silicon Controlled Rectifier, power, thermal resistance, heatsink,
T
j
max, knee voltage, slope resistance
Abstract This Application Note describes how to calculate the power dissipation for
triacs and Silicon Controlled Rectifiers. Thermal calculations are also
included to help the circuit designer to predict the maximum junction
temperature or calculate the required heatsink thermal resistance. Four
worked examples ensure that all the power and thermal questions that
arise during the design process are covered.
