Labada qalab ee korontada ku shaqeeya ee loo yaqaan 'din rail power supply' iyo 'switching power supply' labaduba waa qalab lagu beddelo korontada, laakiin aad bay ugu kala duwan yihiin naqshadeynta, waxqabadka iyo isticmaalka.
Korontada birta ee loo yaqaan 'din rail' waxay korontada beddela gelinta u beddeshaa koronto toos ah iyadoo qoto dheerkeedu yar yahay iyada oo loo marayo wareegyada sida hagaajinta, shaandhaynta iyo nidaaminta danabka.