This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LM2576SX-ADJNOPB and LM2678SX-5.0NOPB Tab material

I am doing a thermal analysis on the switching regulators LM2576SX-ADJNOPB and LM2678SX-5.0NOPB. 

Can you tell me what the material on the tab is made from?

Any help is appreciated.

Regards,

Frank