Siemens 3NA3 144 NH Fuse Link

Description

The Siemens 3NA3 144 is a robust NH fuse link of size 1, designed for industrial circuit protection. It provides reliable performance with a rated current of 250A and a rated voltage of 500V AC. Its gG operating class ensures full-range protection for cables and lines against both overload and short-circuit conditions, making it a critical component for system safety and integrity.

Specifications

• Manufacturer: Siemens
• Part Number: 3NA3 144
• Type: NH Fuse Link
• Size: NH1
• Rated Current: 250A
• Rated Voltage: 500V AC
• Operating Class: gG
• Breaking Capacity: 120 kA
• Indicator: Front indicator

Label Info

• Siemens 3NA3 144
• NH1-gG
• 250A
• 500V a.c. / 120kA

Application

This fuse link is ideal for use in industrial distribution boards, motor control centers, and general machinery for protecting main circuits and equipment from overcurrent events.

Country of Origin

Made in Greece.

CO2 Impact

Opting for a refurbished component like this one saves approximately 8.4 kg of CO2 compared to manufacturing a new one, supporting a more sustainable industrial environment.

Availability

This item is in stock and ready for immediate dispatch. Order now from PLC2Day for expert support and fast delivery.

FAQ

What does the 'gG' operating class signify for this 3NA3 144 fuse?

The 'gG' class indicates a full-range breaking capacity fuse for general applications. It is designed to protect cables, lines, and equipment against both overloads (the 'g' part) and short-circuits (the 'G' part).

Yes, the Siemens 3NA3 144 is manufactured to DIN standards for size NH1. It will fit any standard NH1 fuse base, fuse rail, or switch disconnector designed for knife-blade fuses of this size.

Yes, this fuse link is equipped with a front indicator. This small colored indicator on the front plate pops out to provide a clear visual signal when the fuse has blown, simplifying fault finding.

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Last Update: Friday, March 13, 2026