| HHA-Baureihe A / B / T / TU1 / TU2 | |
| Service: | 1912–1970 |
| Manufacturer: | AEG, Busch, Credé, Waggonfabrik Falkenried, Siemens |
| Yearconstruction: | 1911–1929, 1940, 1943 |
| Yearservice: | 1912 |
| Refurbishment: | 1947–53, 1959–61 |
| Yearscrapped: | 1970 |
| Numberbuilt: | 377 cars |
| Numberpreserved: | 6 cars |
| Numberscrapped: | 371 cars |
| Fleetnumbers: | 11–417 |
| Capacity: | 34 seats[1] |
| Operator: | Hamburger Hochbahn AG |
| Depots: | Barmbek |
| Trainlength: | 12.80NaN0–130NaN0 |
| Width: | 2.560NaN0 |
| Height: | 3.140NaN0 |
| Doors: | 2 per side (per car) |
| Maxspeed: | 600NaN0, 800NaN0 (later batches) |
| Weight: | 24.6t |
| Acceleration: | 0.6m/s² |
| Traction Motors: | 2x AEG U109 with 81 kW |
| Poweroutput: | 162-1NaN-1 |
| Electricsystem: | 750 V DC third rail |
| Collectionmethod: | Contact shoe |
| Uicclass: | Bo'Bo' |
| Brakes: | Air brake |
| Safety: | Sifa |
| Coupling: | Central-buffer coupler, Scharfenberg (from 11. batch onwards) |
The Type A is an electric multiple unit (EMU) train type formerly operated on the Hamburg U-Bahn system. They were the first type of subway cars in Hamburg, entering service on 15 February 1912, and were later designated as Type T. Some cars were converted to maintenance service cars.
Type A cars, later designated as Type T, had wooden car bodies and two manually operated sliding doors per side. Seating accommodation consisted of a mix of longitudinal and transverse seats.[2] Some cars were equipped with two cabs. The last Type T car was withdrawn in 1970.[2]
Some cars damaged during World War II were rebuilt with new car bodies and electro-pneumatic doors. These cars rebuilt between 1947 and 1953 were initially redesignated as Type B, but were later designated as Type TU1.[2] 100 cars underwent refurbishment from 1959 until 1961 and received stainless steel paneling and rebuilt car ends, and were designated as Type TU2.[2]