Tatra T6B5

{{Short description|Electrical tram used in former Warsaw Pact countries}}

{{more citations needed|date=February 2022}}

{{Infobox train

| background = #B11018

| name = Tatra T6B5

| image = J26 192 ul. Pirotska, ET 4134.jpg

| caption = Coupled Tatra T6B5 trams in Sofia

| imagesize = 280px

| manufacturer = ČKD Tatra
Tatra-Yug

| assembly = {{flagicon|Czech Republic}} Prague
{{flagicon|Ukraine}} Dnipropetrovsk

| family = Tatra

| yearconstruction = 1983–2007

| numberbuilt = 1,279

| predecessor = Tatra T3

| successor = Tatra-Yug K1

| capacity = 120

| carlength = {{convert|15300|mm|ftin|abbr=on}}

| width = {{convert|2500|mm|ftin|abbr=on}}

| height = {{convert|3145|mm|ftin|abbr=on}}

| doors = 3

| maxspeed = {{convert|65|km/h|mph|abbr=on}}

| weight = {{convert|18000|kg|lb|abbr=on}}

| enginetype = TE 023

| traction motors = 4

| poweroutput = 4×45 kW

| electricsystem = 600 V DC

| collectionmethod = pantograph

| wheels driven = 4

| bogies = 2

| coupling = Scharfenberg

| gauge = {{Track gauge|sg|lk=on}}, {{Track gauge|1524mm|lk=on}}

}}

Tatra T6B5 is a Czechoslovak-built high floor four axle tram with a pulse-width-modulation ('chopper') speed control. This model of tram was produced by CKD Praha in Smíchov, Prague in the period of 1983–1995, following one year in Zličín until 1996. After ČKD Praha went bankrupt, the final assembly and sale of incomplete trams were managed by Inekon Trams until 2007. The last four trams were supplied to the city of Ufa by late 2007. About 1,150 tramcars of this model were produced. In the former Soviet Union, it is also known as Tatra T3M. In 2015 most of these trams were used in Russia, Belarus, Ukraine, and Uzbekistan.In 1994-1996 being licensed Czech Manufacturers Dnipropetrovsk (now Dnipro) based plant, Pivdenmash (literally translated as "Southern Machinery Plant", because it is located in Dnipro, southern Ukraine) built 38 trams of this kind, designated as Tatra-Yug (Tatra-Yug is Russian for "Tatra-South", the index word "south" came from the fact that Dnepropetrovsk is located in the southern part of Ukraine). Then they produced 75 modified trams based on T6B5 model, which was designated as Tatra-Yug K1. Besides the countries of the former Soviet Union, T6B5 trams were also supplied to Bulgaria and North Korea.