The UL 1077 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 1077 certification relates to Supplemental 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 A in 1, 2, and 3 pole variations. They are rated to 5 KA of interrupting Amps. They are UL recognized and approved Internationally.