Soft start on DC OEM box

Could someone share please a product (soft start circuit) that can be bought? I’ve seen some videos how you can make one but I prefer to buy it.
Or maybe 1-phase power supply, 230V AC that doesn’t need soft start. We have ur5 robot.

Thank you!

You can by a solution here https://www.digikey.dk/en/products/detail/ametherm/MM35-1R550-DIN/7652447