Siemens 3NC1440 fusible cilíndrico SITOR 40A 690V aR 14x51mm

Power semiconductor devices fail quickly under short-circuit conditions. The Siemens 3NC1440 cylindrical fuse link interrupts fault currents fast enough to protect rectifiers, inverters and DC drives from thermal damage.

Who is it for

Maintenance engineers and panel builders who need a fast-acting fuse for semiconductor protection in industrial power electronics. It fits standard 14 x 51 mm fuse holders.

Main features

• Rated current 40 A, rated voltage 690 V AC
• Operating class aR for semiconductor protection
• Cylindrical fuse link, size 14 x 51 mm
• Breaking capacity 100 kA
• Ceramic body with silver-plated copper contacts

Specifications

• Rated current: 40 A
• Rated voltage: 690 V AC
• Operating class: aR
• Fuse size: 14 x 51 mm
• Breaking capacity: 100 kA
• Power dissipation: 4.5 W
• Frequency: 50/60 Hz
• Ambient temperature range: -20 to +50 °C
• Body material: Ceramic
• Contact material: Silver-plated copper
• Series: SITOR

Tips

Select the fuse holder according to the same 14 x 51 mm size and verify the rated voltage of the complete assembly.