The Siemens 3NC8434-3 SITOR semiconductor fuse 500A 660VAC 440VDC W/ 3NH7420 base is a circuit protection device from Siemens. It safeguards wiring and connected equipment by opening or isolating the circuit when current exceeds its rated threshold. Key specifications noted on this listing include 660VAC, 440VDC, 500A. It is commonly used in control panels, switchgear, and machine electrical systems.
