Amp-Trap® R-Rated DIN style fuses are current-limiting, high interrupting rating fuses, intended for the short circuit protection of medium voltage motors and motor controllers. This product range offers North American R-Rated performance in the IEC 282-1 DIN mounting configuration of 442mm. R-Rated fuses are applied as back up fuses that have a minimum interrupting rating, and must be coordinated with overload relays in combination motor starters. Amp-Trap R-Rated, DIN type fuses are offered in voltage ratings of 3.3kV, 5.3kV and 7.2kV in ratings from 2R to 19R. All fuses within this product group are UL component recognized. DEFINITIONS ,R-Rating R-Rated fuses are back-up fuses that operate as follows (Per ANSI C37.46-2000) An R-Rated fuse will melt in the range of 15 to 35 seconds at a value of current equal to 100 times the “R” rating ,Back-up Current-Limiting Fuses A back-up current-limiting fuse is a fuse that can interrupt any current between its rated minimum interrupting current and its maximum interrupting current. Back-up fuses are not designed or intended to open under overload conditions ,Continuous Ampere Rating at 40°C The continuous amp rating defines the thermal capability of the fuse per ANSI C37.46 and should not be the sole factor in fuse selection ,Spring-Reinforced Clip MR45 & Spring Ref.# L096472 ,Fuse-Holder SI 24/442 Ref # K209424 In compliance with IEC 282-1, DIN standard 43625 ,Note Ratings above 19R may be achieved by paralleling fuses. Please consult factory for details
