My question is about the 4th pin of 2N2907AHR transistor with UB package type.https://www.st.com/resource/en/datasheet/2n2907ahr.pdfWhat should I do with the 4th pin?Because of regulations and standards, I cannot let it flow. 

I am working on RHFL7913A (Flat-16 package) and wants to simulate the components under different conditions. However, when I download and import it in the Orcad PSpice (Cadence), I noticed multiple problems:The reference number is RHFL7913 and not RH...