Hello, I am designing a simple circuit and I need some guidance over snubber diode. When we open the switch, when we have a inductor in circuit, we will have that arc over switch which is something that we don't want. Using this snubber diode, we can avoid this. I feel that we will have HUGE voltage spike, on inductor, when we open that switch. How can I (safely) measure that voltage spike, in order to determine how much inverse breakdown voltage my diode has to have? I am assuming oscilloscope. My source is 30V DC.