Siemens Control Systems Fuses Torpedo fuse holder inset 613637 - Siemens 3NC1440, Siemens manufactures the 3NC1440 Torpedo fuse holder inset, designed for use with 40 A fuses at up to 690 V. This component is suitable for holding cylindrical and miniature fuses, ensuring reliable electrical protection in various applications. Typically, it is used in industrial or commercial settings where robust circuit protection is required. Siemens 3NC1440 SITOR Fuse Holder 40A 690V 14x51mm aR Un AC/DC