Product review (5 stars): It's a fridge compressor relay. That's all there is to it.
Outside of being marked "China," which is probably just a manufacturing change, this is identical to the part I removed from my Samsung fridge. Installed along with a new overload and my "uncool" fridge is back to perfect working order. It's been installed for about a month now - I'll try to remember to update if it fails prematurely.