In the picture below, you can see an array of 10 resistors used for DC bus voltage sensing. I think that the blue resistors (the original ones) are 400k/1W. The colors are: yellow, black, black, orange. One of the resistors got open, and I replaced it with the one you see different in the array, the one in the red circle. It's a 390k/1W resistor. The equipment worked well for a couple of hours, then the resistor in the white circle got open.
Do you think the new resistor could have affected the array so that a new resistor got damaged? Well, indeed we have a variation of 10k in the array with the addition of a 390k, which leads to increase the current. I did not find the 400k resistors in the market in that package (MELF). What would you recommend?
Do you think the new resistor could have affected the array so that a new resistor got damaged? Well, indeed we have a variation of 10k in the array with the addition of a 390k, which leads to increase the current. I did not find the 400k resistors in the market in that package (MELF). What would you recommend?