Rotary mgba ọkụ bụ ụdị mgba ọkụ na-atụgharị aka iji chịkwaa nkwụsị nke kọntaktị bụ isi.Enwekwara ụdị nhazi abụọ nke rotary switches, ya bụ, otu ogwe otu ogwe osisi na ihe owuwu ọtụtụ oghere.Single-pole unit rotary switches na-ejikarị ọnụ na rotary potentiometers na ngwa, mgbe multi-pole multi-okwa rotary switches na-akasị ji maka ịmafe na-arụ ọrụ ala sekit.