Mersen UltraSafe US14 and US22 modular fuseholders offer the highest levels of safety and features for IEC Cylindrical 14x51mm fuses and 22x58mm. Like all UltraSafe fuseholders, they qualify as "finger safe" to an IP20 grade of protection under IEC standards. These fuseholders come standard with a mechanical indicator that indicates fuse presence. If a fuse with a mechanical striker is used, the fuseholders mechanical indicator will also indicate a blown fuse. Microswitches can be supplied with the fuseholders if desired to allow for remote blown fuse indication. These fuseholders also feature padlocking capabilities. 750 Volts 50 Amps 3 pole with indicator series.