Jak testować podwójne mosfety na zwarcie ?

patryk006 писал(а):Czy niska oporność względem G1 a S2 to "norma" ?(ok. 15Ω)

Hello!
No, this resistance should be in MΩ range. It is probably also low resistance between pin "G1" and "PHASE" (large pad on bottom side) and the same between pin "S2" and "PHASE".
In this case this transistor is bad and needs to be replaced.

patryk006 писал(а):Jak mierzyć na przebicie tego typu mosfety ?

If you checked the data sheet for this transistor, you probably noticed that there are actually two MOS-FET transistors in single package. Treat it as two separate transistors (Q1 and Q2) and test each of it separately (like all other single MOS-FET transistors).