Original AC adapters for these systems are very difficult to find, and when you do find them they can be quite expensive. Many universal DC adapters do not come with a plug that fits the this unusually sized DC jack.
Using this 6' cable, a suitable power supply can have it's cord replaced with this direct-fit match.
Or if your existing SNES power supply is damaged, this cable can be soldered in for repair.
Super Nintendo (North America)