MAIN CHARACTERISTICS range of product ISFT250..630 range FUPACT product name FUPACT ISFT device short name ISFT250 product or component type FUSE-SWITCH DISCONNECTOR device application DISTRIBUTION COMPLEMETARY CHARACTERISTICS poles description 3P protected poles description 3F fuse type DIN fuse size NH1 network type AC network frequency 50 60 HZ control type FUSE CARRIERS HANDLE [Ith] conventional free air thermal current 175 A 70 DC HORIZONTAL [Ithe] conventional enclosed thermal current 250 A 40 C POWER DISSIPATION PER FUSE 23 W rated duty UNINTERRUPTED [Ui] rated insulation voltage 800 V AC 5060 HZ [Uimp] rated impulse withstand voltage 8 KV [Ue] rated operational voltage 440 V DC [Ie] rated operational current 250 A AC-21B 220240 V AC 5060 HZ [Im] rated making and breaking capacity ICM 105 KA 500 V suitability for isolation YES visible break YES contact operation SINGLE BREAK mechanical durability 1600 CYCLES electrical durability 200 CYCLES 690 V AC 5060 HZ AC-21B provision for padlocking 3 PADLOCKS mounting support MOUNTING PLATE mounting support MOUNTING PLATE mounting location SIDE BY SIDE design HORIZONTAL DESIGN connections terminals SCREW CONNECTION connections - terminals SCREW CONNECTION M10 250 A