Sounds a bit like it.
That PSU has dual 12V rails internally (according to the page you linked). Each rail will have a max current rating, and if all your electronics are on the same rail, then it this might be the issue.
You should try using one rail specifically to run your hot end/motors/fan, and the other to run the heated bed. I don't have the same PSU here, so I can't tell you which one is which.
Note: The fact that it works again after being off for a short while usually means it's tripped an over-current limit. It switches off to avoid dumping a lot of current into a possible short circuit, and the only way to get it back is to disconnect the power and leave it till certain internal currents have discharged (time will vary depending on the PSU, and the nature of the over-current issue).
That PSU has dual 12V rails internally (according to the page you linked). Each rail will have a max current rating, and if all your electronics are on the same rail, then it this might be the issue.
You should try using one rail specifically to run your hot end/motors/fan, and the other to run the heated bed. I don't have the same PSU here, so I can't tell you which one is which.
Note: The fact that it works again after being off for a short while usually means it's tripped an over-current limit. It switches off to avoid dumping a lot of current into a possible short circuit, and the only way to get it back is to disconnect the power and leave it till certain internal currents have discharged (time will vary depending on the PSU, and the nature of the over-current issue).