SIEMENS SITOR Cylindrical Fuse Link 80A 660V AC/700V DC gR 22x58mm (3NC2280)

Protecting semiconductor devices from overcurrent requires a fuse that reacts fast and clears high fault currents without damaging sensitive power electronics. The SIEMENS SITOR cylindrical fuse link 3NC2280 is engineered for exactly this task, with a gR operating characteristic that limits let-through energy and ensures reliable protection of diodes, thyristors, and IGBTs in converters, drives, and UPS systems.

Who is it for

This fuse is intended for electrical engineers, panel builders, and maintenance technicians who need dependable semiconductor protection in industrial power electronics. It fits standard 22x58 mm fuse holders and is suitable for both AC and DC circuits up to 660 V AC and 700 V DC.

Main features

• Rated current 80 A, rated voltage 660 V AC / 700 V DC
• gR operating characteristic optimized for semiconductor protection
• High breaking capacity of 100 kA for safe interruption of short-circuit currents
• Compact cylindrical body 22 x 58 mm with ceramic housing and silver-plated contacts
• Power loss at rated current: 10.5 W
• Complies with IEC 60269-4

Specifications

• Fuse type: Cylindrical fuse link
• Size: 22 x 58 mm
• Rated current: 80 A
• Rated voltage AC: 660 V
• Rated voltage DC: 700 V
• Operating characteristic: gR
• Breaking capacity: 100 kA
• Power loss: 10.5 W
• Application: Semiconductor protection
• Mounting: For fuse holders
• Body material: Ceramic
• Contact material: Silver-plated
• Indicator: Without indicator
• Ambient operating temperature: -20 to +50 °C
• Number of poles: 1
• Product series: SITOR

Tips

Always verify that the fuse holder is rated for the same voltage and current. For DC applications, ensure correct polarity and use appropriate holders to maintain contact pressure. Keep spare fuses in stock to minimize downtime in critical power electronic systems.