Just like the UL 1077 Breakers, the UL 489 DIN rail mounted Circuit Breakers are only 13 mm thin, one of the thinnest in the Industry offering space savings along the rail so that customers can mount more components in a given space. UL 489 certification relates to Branch Circuit Protection with a medium acting trip curve, toggle reset for easy reset and red flag indication upon trip. They are available up to 25 Amps in 1 and 2 pole variations. They are rated to 10 KA of interrupting Amps. They are UL listed and approved Internationally.