Inexperienced electrical person here, but trying to save significant cost to repair an oven. The oven I have has a MR754 diode off the main convection heating element, that has failed. Unfortunately, since it is part of the wiring, the manufacturer only offers up the entire wiring harness as a replacement part at $500+.
Pending all other things checking out with a multimeter, I would like to simply splice in a replacement diode (~$2 part). However I cannot locate an MR754 in my area and it's multiple business days to get one delivered via online order. Local vendors do have an MR756 available. Both are 6 amp current, but the available replacement would be 600 V vs 400 V. Is this safe to use in this application? What is the risk, should I try this? Do I put the other components in the oven (i.e. element or control board) at risk?
Best Answer
Yes, higher voltage rating is fine. It just means more safety margin against mains transients (which is good). The only difference between the -4 and the -6 is the voltage rating (see datasheet).