Product Description

Siemens 3NW61121 Cylindrical Fuse – 32A, 690V AC, 14 x 51 mm, gG

The Siemens 3NW61121 is a SENTRON cylindrical fuse link designed for low-voltage electrical protection applications. It has a 32 A rated current, 690 V AC rated voltage, 14 × 51 mm fuse size, and gG operating class. Siemens' official datasheet identifies the product as a cylindrical fuse link for selective line protection.

For SB Smart, this product is positioned as a Siemens industrial electrical protection component for supply, procurement, replacement and maintenance requirements.

Siemens 3NW61121 Cylindrical Fuse

The 3NW61121 belongs to the Siemens SENTRON 3NW cylindrical fuse system. Siemens describes these cylindrical fuse links and compatible holders as suitable for industrial plants and selective line protection applications.

The cylindrical fuse system is designed for use with compatible fuse holders and fuse disconnectors. Siemens notes that the fuse disconnectors are tested as fuse disconnectors and are not intended for switching under load.

32 A Rated Current

The exact 3NW61121 has a rated current of 32 A. Siemens' official datasheet confirms the 32 A rating.

The 32 A rating should be selected according to the protected circuit, conductor capacity, equipment requirements and the overall protection-coordination design.

690 V AC Rated Voltage

The 3NW61121 is rated for 690 V AC. Siemens' official datasheet specifies the operating voltage as 690 V AC and a 250 V DC supply voltage.

The actual system voltage should always be checked before selecting or replacing the fuse.

14 × 51 mm Fuse Size

The exact 3NW61121 uses a 14 × 51 mm cylindrical fuse format. This physical dimension is confirmed by Siemens' official product documentation.

The fuse dimensions must match the corresponding fuse holder or fuse-disconnector arrangement. A replacement should therefore be checked for both electrical and mechanical compatibility.

gG Operating Class

The 3NW61121 has a gG operating class. Siemens identifies the fuse as a gG cylindrical fuse link.

gG fuses are used for general-purpose protection against overload and short-circuit conditions in suitable low-voltage electrical circuits.

Cylindrical Fuse for Selective Line Protection

Siemens describes the 3NW cylindrical fuse system as suitable for selective line protection.

This makes the 3NW61121 relevant for electrical distribution and protection arrangements where coordinated fuse protection is required.

Proper selection should consider the upstream and downstream protective devices and the characteristics of the protected circuit.

No Striker

The official Siemens datasheet specifies that the 3NW61121 has no striker.

This means the fuse does not include a striker element for mechanically actuating an associated indication or switching mechanism.

Mounting Position

Siemens specifies the mounting position for the 3NW61121 as any position, preferably vertical.

The installation should still follow the recommendations for the selected fuse holder and electrical assembly.

Power Dissipation

Siemens' current datasheet lists approximately 3.5 W power loss, with approximately 4 W at the rated current in hot operating condition per pole.

This information can be useful when considering heat generation and thermal conditions inside enclosed electrical panels.

Compact Industrial Fuse Design

The 14 × 51 mm cylindrical format provides a compact fuse solution for compatible electrical protection assemblies.

The exact product has an approximate net weight of 21 g, according to Siemens' official datasheet.

Its compact construction can be useful where space-efficient fuse protection is required.

Suitable for Industrial Electrical Systems

The 3NW61121 can be considered for compatible applications such as:

• Industrial electrical panels

• Low-voltage distribution

• Feeder protection

• Selective line protection

• Electrical equipment protection

• Machinery protection

• Industrial control panels

• Fuse replacement applications

Actual application should always be based on system voltage, load current, prospective short-circuit current and the complete protection design.

Fuse Replacement Applications

The 3NW61121 can be used as a replacement where the existing fuse requires compatible:

• Rated current

• Rated voltage

• Fuse size

• Operating class

• Fuse-holder compatibility

A replacement fuse should not be selected solely because the current rating is the same. Physical size and voltage rating must also match.

Compatible Fuse Holder Selection

Because the 3NW61121 is a 14 × 51 mm cylindrical fuse, the corresponding fuse holder must be designed for this physical format and the applicable electrical rating.

The Siemens 3NW cylindrical fuse system includes dedicated fuse holders and fuse-disconnector solutions for compatible 3NW fuse links.

Standardized Siemens SENTRON Solution

The 3NW61121 is part of the Siemens SENTRON cylindrical-fuse family. Siemens documentation lists multiple 14 × 51 mm current ratings, including the 32 A 3NW61121.

Published Siemens product documentation also identifies the broader 3NW cylindrical fuse family with rated currents from approximately 0.5 A to 100 A, depending on the fuse size and configuration.

Suitable for Electrical Panel Builders and Industrial Buyers

The Siemens 3NW61121 is relevant for:

• Electrical panel builders

• Industrial buyers

• Maintenance departments

• Electrical contractors

• OEM equipment maintenance

• Electrical product dealers

• Replacement-part procurement

For SB Smart, the product is positioned around industrial electrical product supply and procurement, without claiming automation integration or automation-service work.

Key Features

• Siemens SENTRON 3NW cylindrical fuse link

• Article number 3NW61121

• 32 A rated current

• 690 V AC rated voltage

• 250 V DC supply voltage

• 14 × 51 mm cylindrical fuse size

• gG operating class

• No striker

• Mounting position: any, preferably vertical

• Approx. 21 g net weight

• Approx. 3.5 W power loss

• Approx. 4 W power loss at rated current in hot operating condition per pole

Benefits

• 32 A protection: Suitable for compatible circuits requiring a 32 A fuse.

• 690 V AC rating: Suitable for compatible higher-voltage low-voltage systems within the specified rating.

• 14 × 51 mm format: Supports compact cylindrical fuse installations.

• gG protection: Suitable for general-purpose overload and short-circuit protection.

• Selective line protection: Relevant for coordinated electrical distribution applications.

• Compact construction: Useful for space-conscious panel designs.

• Siemens SENTRON design: Provides a standardized cylindrical-fuse solution.

• 21 g net weight: Convenient for compact fuse assemblies.

Why Choose Siemens 3NW61121?

The Siemens 3NW61121 is a 32 A, 690 V AC, 14 × 51 mm cylindrical fuse link with gG operating class, designed for compatible Siemens SENTRON 3NW fuse systems and selective line-protection applications.

It is suitable for customers looking to buy or source Siemens cylindrical fuse links for industrial electrical distribution, panel maintenance and replacement requirements.

For SB Smart, this product is best presented as a Siemens industrial electrical protection component for supply and procurement across India.

Delivery Across India

SB Smart supplies Siemens industrial electrical products across Faridabad, Gurgaon/Gurugram, Delhi NCR, Haryana, Noida, Punjab, Mumbai and other major Indian cities.

Major delivery locations include:

• Faridabad

• Delhi

• Gurgaon/Gurugram

• Delhi NCR

• Noida

• Greater Noida

• Haryana

• Punjab

• Mumbai

• Pune

• Ahmedabad

• Bengaluru

• Hyderabad

• Chennai

• Kolkata

• Jaipur

• Chandigarh

• Lucknow

• Indore

• Surat

• Vadodara

• Nagpur

• Coimbatore

• And other major cities across India

Frequently Asked Questions

1. What is Siemens 3NW61121?

The 3NW61121 is a Siemens SENTRON cylindrical fuse link rated at 32 A, with a 14 × 51 mm size and 690 V AC operating voltage.

2. What is the operating class?

The operating class is gG.

3. What is the fuse size?

The exact fuse size is 14 × 51 mm.

4. What is the rated current?

The rated current is 32 A.

5. What is the rated voltage?

The rated operating voltage is 690 V AC. Siemens also specifies a 250 V DC supply voltage.

6. Does it have a striker?

No. Siemens specifies no striker for the 3NW61121.

7. What is the approximate power loss?

Siemens lists approximately 3.5 W, with approximately 4 W at rated current in hot operating condition per pole.

8. What is the recommended mounting position?

It can be mounted in any position, preferably vertical.

9. Where is the 3NW61121 used?

It is suitable for compatible industrial electrical distribution, selective line protection, panels and fuse-protection assemblies.

10. Where can I buy Siemens 3NW61121 in India?

SB Smart supplies Siemens industrial electrical products and cylindrical fuse links in India for industrial buyers, panel builders, maintenance requirements and replacement procurement.