| U-393 | Type VIIC |
| Feldpost Number | M 52 294 |
| Construction Yard | Howaldtswerke AG, Kiel-Gaarden |
| Yard Number | 24 |
| Ordered | 20th Jan 1941 |
| Keel laid | 8th Apr 1942 |
| Launched | 15th May 1943 |
| Commissioned | 3rd Jul 1943 |
| Baubelehrung | 1.KLA, Kiel |
| Training, Flotillas and Duties |
| 07.43 - 10.44 | 5.U-Flottille, Kiel Ausbildungsboot (under training)
|
| 11.44 - 03.45 | 24.U-Flottille, Gotenhafen Erprobungsboot (under testing)
|
| 04.45 - 05.45 | 5.U-Flottille, Kiel Ausbildungsboot (under training)
|
| Commanders |
| 07.43 - 09.44 | OL Alfred Radermacher see also: U-120 U-5 |
| 09.44 - 01.45 | OL Walter Zenker see also: U-57 U-3535 |
| 01.45 - 03.45 | OL Joachim Seeger see also: UD-3 |
| 03.45 - 05.45 | OL Friedrich-Georg Herrle see also: U-307 U-312 |