I'm developing a home automation system, and using a triac to power on/off some lights.
My problem is that lights from other rooms when switched on/off are producing noise/spikes and flashing the lights turned on by the automation (triac).
I added a snubber like this, and it is all good now. My point is how to calculate the ratings of the RC components.
The answer is "calculate the necessary power dissipation, and after that the RC", but considering that spikes are randomly and in rare situations I'm using a 0805 resistor and a 0805 capacitor.
My voltage is 220Vac. The resistor has Umax = 150V. I'm using it and it is working as expected. Aparently the lower voltage is not a problem for the spikes.
Can I desconsider the resistor Umax for spikes, and use it definatevly in my system? I'm assuming the RC will dissipate a very low energy.