3RACHA (Hangul: 쓰리라차) is a South Korean hip-hop sub-unit group under JYP Entertainment. The group consists of Bang Chan, Changbin and Han under other stage names. All their music is uploaded onto SoundCloud and the trio is credited as writing and producing the majority of Stray Kids' discography alongside JYP producers.
History
The unit was formed by JYP Entertainment in 2016. On January 18, 2017, they uploaded their first untitled mixtape/ extended play, J:/2017/mixtape, onto SoundCloud, consisting of seven tracks. On August 16, 2017, they uploaded their second extended play, 3Days, onto SoundCloud as well, consisting of nine tracks. Before this, they were announced to be a part of a JYP's survival show titled Stray Kids. On December 20, 2017, 3RACHA released their third extended play, Horizon, consisting of eight tracks.
On January 18, 2018, 3RACHA released a special song, "Start Line" to celebrate their first year as a group. On March 26, 2018, they debuted with Stray Kids.
On September 9, 2018, the three returned with a music video for their first release since debut, "Zone".
On January 18, 2020, they released "Carpe Diem" to celebrate their third year as a group.
Source : stray-kids.fandom.com