I have a PCBA where I want to test the IGBTs but I want to test them in ICT mode, that is, without powering the board and without desoldering the IGBTs. If I measure the resistance between the terminals is it an unequivocal way to find out if the IGBT is good? Is there another effective method without unsoldering and without powering the circuit?

 

Without powering the board, you can only measure a very few static parameters on the transistors. You can not tell if they are functional without applying gate bias.

 

Without powering the board, you can only measure a very few static parameters on the transistors. You can not tell if they are functional without applying gate bias.

thanks for your answer,
the IGBT reference I'm trying to measure is RGS50TSX2HR is a 1200V, 25A Field Stop Trench IGBT, designed for high-efficiency switching applications. The application is for a high voltage coolant heater for electric cars.
My objective is to measure In Circuit testing mode and I can´t remove the IGBT from the board, and i can´t power the PCBA, is there any external circuit that I can apply to the IGBT without compromising the functionality of the components around it?

 

thanks for your answer,
the IGBT reference I'm trying to measure is RGS50TSX2HR is a 1200V, 25A Field Stop Trench IGBT, designed for high-efficiency switching applications. The application is for a high voltage coolant heater for electric cars.
My objective is to measure In Circuit testing mode and I can´t remove the IGBT from the board, and i can´t power the PCBA, is there any external circuit that I can apply to the IGBT without compromising the functionality of the components around it?

That all depends on what components are connected to the IGBT, and how they are interconnected.

 

is there any external circuit that I can apply to the IGBT without compromising the functionality of the components around it?

Possibly, but only if you know the exact circuitry connected to the IGBT.