|Ordered||23 Sep 1939|
|Laid down||8 Apr 1940||Danziger Werft AG, Danzig (werk 102)|
|Launched||16 Dec 1940|
|Commissioned||10 Apr 1941||Kptlt. Gero Zimmermann|
|Successes||No ships sunk or damaged|
Sunk on 3 August 1941 in the North Atlantic south-west of Ireland, in position 50.30N, 19.35W, by depth charges from the British corvette HMS Hydrangea. 45 dead (all hands lost). (Axel Niestlé, February 2004).
Men lost from U-boats
Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-401 did not suffer any casualties (we know of) until the time of her loss.