Oceangoing very long-range combat U-boat type of conventional design developed in 1942. First two units converted to transport U-boats during construction in 1944.
| Surface/submerged displacement: | 1616/1804 t |
| Overall length/beam/draught: | 87.58 m/7.50 m/5.35 m |
| Standard main armament: | 6 torpedo tubes (4 bow, 2 stern) with up to 27 torpedoes, after conversion to transport role in 1944 all bow torpedo tubes removed with 5 torpedoes remaining in the stern compartment |