R-rated MOTOR STARTER FUSES 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 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.