In a faulty tester due to overvoltage with 220 VAC, wrong measurement in incorrect scale (mV) I found an SMD component that looks like a Rectifier diode and on the board it appears as D5 4007 but when checking it with the typical diode test of a tester me It gives as if it were open, that is, it does not give any resistance reading (R. infinite) either directly or in reverse. I wanted to know if this test is correct and what component it is and how to replace it if necessary. Thank you so much.