The DC Din Rail Circuit Breaker is UL 489A rated and are also only 13 mm thin, one of the thinnest in the Industry offering space savings along the rail so that American Electrical’s customers can mount more components in a given space. UL 489A 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 50 Amps in 1 pole only. They are rated to 10 KA of interrupting Amps. They are UL listed and approved Internationally.