Siemens NH Fuse Link 630A 500V 3NA3 372

Description

The Siemens 3NA3 372 is a high-quality NH fuse link, size 3, designed for reliable protection of industrial installations and equipment against short circuits and overloads. With a rated current of 630A and a voltage rating of 500V AC, it is suitable for a wide range of low-voltage applications. The gG operating class makes it ideal for general-purpose line and cable protection.

Specifications

• Manufacturer: Siemens
• Part Number: 3NA3 372
• Rated Current: 630A
• Rated Voltage: 500V AC
• Fuse Size: NH3
• Operating Class: gG (General Purpose)
• Breaking Capacity: 120kA

Label Info

• Brand: SIEMENS
• Model: 3NA3 372
• Type: NH3-gG
• Rating: 630A
• Voltage: 500V

Application

Ideal for use in power distribution boards, switchgear, and motor control centers in industrial environments to protect cables, power lines, and other critical equipment from overcurrent events.

Country of Origin

This product is typically manufactured in Europe, with common origins including Hungary or Slovenia.

CO2 Impact

By choosing this refurbished item, you are helping to avoid approximately 13.0 kg of CO2 emissions, which is equivalent to driving a standard passenger car for 65 kilometers.

Availability

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

FAQ

What is the difference between gG and gL characteristics?

The gL characteristic is an older standard for general line protection. The gG characteristic is the current standard for general purpose protection and fully replaces the gL class, covering the same applications for cable and line protection.

Can this fuse be used in a DC circuit?

While primarily designed for AC systems, many NH fuses have a DC voltage rating which is typically lower than the AC rating. Always consult the official Siemens datasheet for the specific DC application capabilities and breaking capacity of the 3NA3 372.

Does this fuse have a trip indicator?

Yes, this NH fuse is equipped with a front indicator (red pop-out tab) that provides a clear visual signal when the fuse has blown, allowing for quick identification and replacement.

Last Update: Friday, March 13, 2026

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