Tokyu 5000 series (2002)/Tokyu 5050 series

The Tokyu 5050 series is a Japanese city commuter electric multiple unit operated by the Tokyu Corporation since April 2004 on the Tokyu Tōyoko Line.
==History==
The 5050 series sets were designed as the new generation of rolling stock on the Tokyu Tōyoko Line. A total of 224 cars were produced from 2004 to 2019, with the sets entering service on 1 April 2004; a ten-car derivative was introduced in September 2011. 
Set 5155 was involved in an accident in 2014 and was scrapped in 2017; set 5177 was built in 2016 to replace said set. 5156 was transferred to the Yokohama Minatomirai Railway in 2018 to replace Y500 series set Y516 damaged in the same accident; it was subsequently renumbered Y517, with set 5178 being built in 2019 to replace said set. Set 5173 was reformed into a 10 car set in 2020 and renumbered 4111. Set 5166 was later reformed into a 10-car set in 2020 and renumbered 4112.
==Design==
The 5050 series cars use a contemporary design featuring a flat front and top-mounted recessed headlights; these have since been replaced with LED fixtures. As they are mainly used on the Tōyoko line the cars have a pink band running down the sides of the cars.
==Specifications==
Construction of the cars is of stainless steel. The sets are based on the JR East E231 series cars and share some mechanicals. The sets use Hitachi IGBT variable frequency drive traction systems, depending on when the sets were built the drives produce either a a whining noise, a sharp hissing noise or a muted hissing noise.
Category:Electric trainsets
Category:Tokyu trains
Category:J-TREC locomotives
Category:Tokyu Car locomotives