British standard Extremely high breaking capacity fuses: Protection of power semiconductors as per IEC standard 60269-1 and -4 690 V voltage rating as per IEC 33 gR class (gRB ratings 50 to 65A) as per VDE 636-23 - Clearing all overloads - Improved safety and protection - Enabling selective coordination with all fuses aR class (URC and URD ratings 75 to 500 A) as per VDE 636-23 and IEC 60269-4 Designs without blown fuse indicator and with separate trip-indicator These fuses are UL Recognized.
