Electronic – Inrush current in Apk/us what does it mean

Dealing with the voltage spikes is more like curing the symptoms than curing the causes. The large inrush current seems to be your problem. Parasitic and stray inductances in your circuit store energy due to this inrush currenent spike and after switching off this stored energy causes the voltage spikes. The inrush current can be reduced by using a soft start mechanism that slowly ramps up the duty cycle on startup or by using current-mode control.

The soft start can be implemented easily with most PWM controllers, but current-mode control is much more reliable as it always limits current, not just during startup. It is also more difficult to implement as it requires a current measurement transformer and a suitable PWM controller.

It looks like the Meanwell supply might work as is. Have you tried it?

I don't know how they behave if the load is too small (too much current.) If you got a bench supply, (some cheap Mastech maybe), then when it starts it will just go into CC mode (constant current) and maybe work just fine.