Sony also said it would cut the price of its 60-gigabyte PS3 by 100 euros to 499 euros "while stocks last."
Sony launched the PS3 in the United States last November with a 20-gigabyte model and the bigger 60-gigabyte model, which was expected to cater to gamers who also use the device to watch video and movies. Sony discontinued the lower-capacity PS3 in North America due to strong sales of the higher-capacity model.
Unlike the 60-gigabyte version, the 40-gigabyte PS3 cannot play games developed for the older PlayStation 2 model.
Sony did not say when it might launch a 40-gigabyte PS3 in the United States.