Littelfuse NH3M400 - EUROPEAN STYLE TYPE NH FUSE 3 M 400A. Littelfuse® European style NH fuse links are designed for the protection of conductors and motors. The gL-gG characteristic fuse links are generally used to protect cables and installation lines from overloads and short-circuits. The aM characteristic fuse links are used for the short-circuit protection of motors and switchgear. They are available in NH00C to NH3 sizes up to 630 amperes.
Littelfuse

NH3M400

UPC: 079458037005


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Overview

The Littelfuse NH3M400 is a European Style Type NH fuse link, engineered for robust protection of conductors and motors in industrial electrical systems. With a substantial 400A current rating and NH3 size, this fuse link is designed to safeguard critical infrastructure against overloads and short-circuits. It features a gL-gG characteristic, making it ideal for general protection of cables and installation lines, ensuring operational continuity and preventing damage from sustained overcurrent conditions. Furthermore, its aM characteristic provides specialized, rapid short-circuit protection for motors and switchgear, preventing catastrophic failures during fault events. This fuse link is compatible with NH fuse bases up to 630 amperes and operates at 400VAC. Manufactured by Littelfuse, a trusted name in circuit protection, the NH3M400 adheres to stringent industry standards, providing reliable performance and peace of mind. Its construction ensures durability and precise tripping, essential for maintaining the integrity of high-power industrial circuits. The NH3M400 is a key component for ensuring the safety and longevity of electrical installations where high currents and demanding protection requirements are present. It is designed for use in systems requiring reliable overload and short-circuit interruption, making it a vital part of motor control centers, power distribution panels, and other critical industrial applications. The Littelfuse NH3M400 is built to deliver consistent protection, minimizing downtime and protecting valuable equipment from electrical hazards. Its application extends to protecting motor circuits, power cables, and main distribution lines where precise and dependable fault interruption is paramount. The NH3M400 is part of a comprehensive range of NH fuse links available in sizes from NH00C to NH3, catering to a wide spectrum of current requirements up to 630A. Specifications include a 400A current rating and NH3 size, suitable for 400VAC applications. The NH3M400 offers a power dissipation of 25.1W at its rated current (In) and has a width of 51 mm.
  • European Style Type NH Fuse Link
  • 400A Current Rating
  • NH3 Size
  • gL-gG and aM Characteristics for Conductor and Motor Protection
  • 400VAC Rated Voltage

Specifications

Application
Electronic
Brand Name
Littelfuse
Special Features
EUROPEAN STYLE
Sub Brand
NH Series
Type
NH Fuses
EUROPEAN STYLE TYPE NH FUSE 2 G 400A. Littelfuse® European style NH fuse links are designed for the protection of conductors and motors. The gL-gG characteristic fuse links are generally used to protect cables and installation lines from overloads and short-circuits. The aM characteristic fuse links are used for the short-circuit protection of motors and switchgear. They are available in NH00C to NH3 sizes up to 630 amperes.

NH2G400

EUROPEAN STYLE TYPE NH FUSE 2 G 400A. Littelfuse® European style NH fuse links are designed for the protection of conductors and motors. The gL-gG characteristic fuse links are generally used to protect cables and installation lines from overloads and short-circuits. The aM characteristic fuse links are used for the short-circuit protection of motors and switchgear. They are available in NH00C to NH3 sizes up to 630 amperes.
DIN D Fuse-link gG Size DII 500VAC 500VDC 32A Color code Black

M229091

DIN D Fuse-link gG Size DII 500VAC 500VDC 32A Color code Black

Frequently Asked Questions about Littelfuse

What certifications and standards do Littelfuse products comply with?

Littelfuse products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Customers can verify specific product certifications by consulting individual product datasheets on Littelfuse.com, which provide comprehensive details about standards compliance for each component.

What industries and applications are Littelfuse products used for?

Littelfuse products are critical for electrical protection and safety across multiple industrial sectors, including manufacturing, automation, power distribution, and electrical control systems. Their comprehensive product portfolio serves industries that require robust electrical protection, including motor and pump applications, solar installations, programmable logic controllers (PLCs), electrical switch panels, and critical infrastructure environments. Key product lines protect against overcurrent, voltage transients, ground faults, and temperature-related electrical risks, ensuring equipment safety and operational reliability.

What technical support does Littelfuse offer?

Littelfuse offers comprehensive technical support through multiple channels. Their Technical Hotline (800-TEC-FUSE) provides direct access to engineers who can help identify issues and recommend solutions. Additionally, Littelfuse offers extensive online Technical Resources at Littelfuse.com, including datasheets, product manuals, whitepapers, application guides, and online design tools. Their experienced product and application engineers also provide step-by-step support from design to installation.

What are the main product lines offered by Littelfuse?

Littelfuse offers comprehensive industrial protection and control product lines, including fuses, fuse holders, protection relays, temperature sensors, and electrical safety components. Their key product categories span surge protective devices, custom OEM products, electrical switch panels, medium voltage fuses, ground-fault protection relays, motor and pump protection devices, and temperature sensors. These products are designed to minimize electrical safety hazards, limit equipment damage, improve productivity, and safeguard personnel from electrical faults.

What are the key features of Littelfuse products?

Littelfuse products feature exceptional circuit protection technologies with key characteristics including UL/IEC safety standard compliance, low internal resistance, and advanced protective capabilities across multiple product lines. Their components provide critical protection for industrial systems, offering features like overcurrent protection, voltage transient suppression, and resettable protection devices with ultra-low resistance and compact designs. Key product lines include fuses, metal oxide varistors (MOVs), TVS diodes, PolySwitch devices, and specialized electronic protection components that enhance system reliability and safety.

What environmental ratings do Littelfuse products have?

Littelfuse products feature comprehensive environmental ratings, including NEMA Type 1, 2, 3, 3R, 4/4X, 12, and 13 certifications, as well as IP65 protection. These ratings ensure superior protection in diverse industrial environments, with an operating temperature range of -40°F to +131°F (-40°C to +55°C). Many products also include UV-stabilized materials and neoprene gaskets for enhanced durability in outdoor and challenging conditions.

What accessories are available for Littelfuse products?

Littelfuse offers several key accessories across their product lines, including fuse holders, voltage monitoring modules, and terminal connectors. Specific accessories include the LPSM003ZXID (indicating) and LPSM003Z (non-indicating) POWR-SAFE Dead Front fuse holders for Class CC and Midget-Style fuses, the VRM6048 voltage monitor accessory module, and female quick connect terminals (P1015 series) in various wire gauge sizes. These accessories are designed to enhance protection, monitoring, and connectivity for Littelfuse electrical components.

What is Littelfuse's warranty policy?

Littelfuse provides comprehensive warranty details on their official website at www.littelfuse.com/warranty. Customers should visit this page to review the specific warranty terms and conditions for their specific product lines. For direct warranty support or questions, customers can contact Littelfuse Technical Support at 1-800-TEC-FUSE or email [email protected].

What communication protocols do Littelfuse products support?

Littelfuse supports a comprehensive range of industrial communication protocols, including PROFIBUS, PROFINET, EtherNet/IP, DeviceNet, Modbus RTU, and CANopen. Our products provide flexible connectivity solutions across multiple industrial automation platforms, enabling seamless integration with various control systems and network architectures.

How are Littelfuse products typically installed?

Littelfuse products are typically installed using specialized mounting hardware like fuse holders, blocks, and panels designed for specific industrial applications. The POWR-SAFE Dead Front holders, for example, provide optimum protection for Class CC and Midget-Style fuses, supporting installations up to 600 VAC/DC. Installation often involves using precision terminals with strain relief, such as 0.25 in. female quick connect terminals, to ensure secure and safe electrical connections in industrial control systems.