Substituting multiple lower voltage resistors for a high voltage resistor.
Certain high voltage resistors are fairly hard to get, such as the HVR37 series from Vishay. I'm looking at redesigning a board that produces 1000V via a transformer, but I want to use parts that are more readily available.
Is it reasonable and safe to replace, say, a 1MOhm axial resistor rated for 2000V with four 250KOhm surface mount resistors rated for 500V? What might I need to watch out for?