triac diac question

When using a diac to fire the triac, and the diac fires at 30 volts, is not the rise time to 30 volts reflected as clipping on the output sine wave. I am seeing strange results using our simulator. Thanks

Comments (may or may not be related)

Remember that triacs can fire on their own if dv/dt is exceeded. That's why snubbers are used.

Triacs need a minimum load.

Thanks for the reply, yes I have see what you described. I worked out roughly 30volts rms of 120 volt source equated to 22.5 degrees firing angle.