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Littelfuse MEG350 - FUSE - MEGA BOLT-ON BOX 350A. The MEGA® Fuse is designed for high current circuit protection up to 250 amperes with Diffusion Pill Technology. The MEGA® Fuse also provides time delay characteristics. Designed and patented by Littelfuse, the MEGA® Fuse is ideal for battery and alternator protection application and other heavy gauge cables requiring ultra-high current protection.

Littelfuse MEG350 FUSE - MEGA BOLT-ON BOX 350A. The MEGA® Fuse is designed for high current circuit…

Alternate Item Number: 0MEG350.X

UPC: 079458185539


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Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

The Littelfuse MEG350 is a 350A Mega Bolt-On Fuse designed for ultra-high current protection in demanding industrial and automotive applications. Utilizing Littelfuse's patented Diffusion Pill Technology, this fuse provides reliable overcurrent protection up to 32V AC/DC. The MEGA® Fuse series is specifically engineered for applications requiring robust safeguarding of heavy-gauge cables, such as battery and alternator connections. Its Slo-Blo® feature eliminates nuisance blowing during temporary, short-duration overloads, ensuring uninterrupted operation while still providing rapid interruption during sustained overcurrent events. This precise tripping behavior is crucial for protecting sensitive components and preventing potential damage to critical electrical systems. The bolt-on design facilitates secure and dependable installation in heavy-duty electrical configurations, built to withstand rigorous conditions. The MEG350 is an ideal choice for applications where uncompromising circuit protection is paramount, offering a dependable and technologically advanced solution for extreme electrical loads. Trust Littelfuse, a recognized leader in circuit protection, for quality and performance in your critical applications. Key features include: 350A current rating, 32V AC/DC voltage rating, Diffusion Pill Technology for precise interruption, Slo-Blo® time-delay characteristics to prevent nuisance tripping, and a secure bolt-on design for heavy-duty installations. Commonly used for battery and alternator connections and other heavy gauge cables requiring ultra-high current protection. Additional information available at Littelfuse.com/MEGA.
  • 350A Current Rating
  • 32V AC/DC Voltage Rating
  • Diffusion Pill Technology for precise interruption
  • Slo-Blo® time-delay characteristics to prevent nuisance tripping
  • Bolt-on design for secure, heavy-duty installations

Specifications

Amperage Rating
350 A
Application
Automotive
Brand Name
Littelfuse
Connection Type
Bolt-on
Current Rating
350 A
Mounting Type
Bolt-On
Series
MEGA
Special Features
Splashproof
Sub Brand
MEGA Series
Type
Bolt Down Fuse Holder
FUSE - MEGA BOLT-ON BOX 300A. The MEGA® Fuse is designed for high current circuit protection up to 250 amperes with Diffusion Pill Technology. The MEGA® Fuse also provides time delay characteristics. Designed and patented by Littelfuse, the MEGA® Fuse is ideal for battery and alternator protection application and other heavy gauge cables requiring ultra-high current protection.

MEG300

FUSE - MEGA BOLT-ON BOX 300A. The MEGA® Fuse is designed for high current circuit protection up to 250 amperes with Diffusion Pill Technology. The MEGA® Fuse also provides time delay characteristics. Designed and patented by Littelfuse, the MEGA® Fuse is ideal for battery and alternator protection application and other heavy gauge cables requiring ultra-high current protection.
FUSE - MEGA BOLT-ON BOX 400A. The MEGA® Fuse is designed for high current circuit protection up to 250 amperes with Diffusion Pill Technology. The MEGA® Fuse also provides time delay characteristics. Designed and patented by Littelfuse, the MEGA® Fuse is ideal for battery and alternator protection application and other heavy gauge cables requiring ultra-high current protection.

MEG400

FUSE - MEGA BOLT-ON BOX 400A. The MEGA® Fuse is designed for high current circuit protection up to 250 amperes with Diffusion Pill Technology. The MEGA® Fuse also provides time delay characteristics. Designed and patented by Littelfuse, the MEGA® Fuse is ideal for battery and alternator protection application and other heavy gauge cables requiring ultra-high current protection.
FUSE - MEGA BOLT-ON BOX 500A. The MEGA® Fuse is designed for high current circuit protection up to 250 amperes with Diffusion Pill Technology. The MEGA® Fuse also provides time delay characteristics. Designed and patented by Littelfuse, the MEGA® Fuse is ideal for battery and alternator protection application and other heavy gauge cables requiring ultra-high current protection.

MEG500

FUSE - MEGA BOLT-ON BOX 500A. The MEGA® Fuse is designed for high current circuit protection up to 250 amperes with Diffusion Pill Technology. The MEGA® Fuse also provides time delay characteristics. Designed and patented by Littelfuse, the MEGA® Fuse is ideal for battery and alternator protection application and other heavy gauge cables requiring ultra-high current protection.
FUSE - MEGA BOLT-ON BOX 450A. The MEGA® Fuse is designed for high current circuit protection up to 250 amperes with Diffusion Pill Technology. The MEGA® Fuse also provides time delay characteristics. Designed and patented by Littelfuse, the MEGA® Fuse is ideal for battery and alternator protection application and other heavy gauge cables requiring ultra-high current protection.

MEG450

FUSE - MEGA BOLT-ON BOX 450A. The MEGA® Fuse is designed for high current circuit protection up to 250 amperes with Diffusion Pill Technology. The MEGA® Fuse also provides time delay characteristics. Designed and patented by Littelfuse, the MEGA® Fuse is ideal for battery and alternator protection application and other heavy gauge cables requiring ultra-high current protection.
FUSE AGU 5AG 32V BOX 25A. Originally stood for “all glass.” The automotive industry uses the “AG” prefix (AGC, AGW) for most glass fuses. They vary in length, diameter and amperage rating.

AGU25

FUSE AGU 5AG 32V BOX 25A. Originally stood for “all glass.” The automotive industry uses the “AG” prefix (AGC, AGW) for most glass fuses. They vary in length, diameter and amperage rating.
FUSE PAL AUTO LINK 32V MALE BOX 120A. PAL™ Fuses are available in current ratings up to 120 amperes, with either female or bolt-on terminals.

PAL1120

FUSE PAL AUTO LINK 32V MALE BOX 120A. PAL™ Fuses are available in current ratings up to 120 amperes, with either female or bolt-on terminals.
FUSE AGU 5AG 32V BOX 3A. Originally stood for “all glass.” The automotive industry uses the “AG” prefix (AGC, AGW) for most glass fuses. They vary in length, diameter and amperage rating.

AGU3

FUSE AGU 5AG 32V BOX 3A. Originally stood for “all glass.” The automotive industry uses the “AG” prefix (AGC, AGW) for most glass fuses. They vary in length, diameter and amperage rating.
FUSE AGX 8AG 32V BOX 25A. Originally stood for “all glass.” The automotive industry uses the “AG” prefix (AGC, AGW) for most glass fuses. They vary in length, diameter and amperage rating.

AGX25

FUSE AGX 8AG 32V BOX 25A. Originally stood for “all glass.” The automotive industry uses the “AG” prefix (AGC, AGW) for most glass fuses. They vary in length, diameter and amperage rating.

Frequently Asked Questions

What types of fuses does Littelfuse offer for industrial applications?

Littelfuse offers UL Class fuses, high-speed fuses, medium voltage fuses, 10 x 38 mm fuses, and solar fuses for industrial applications.

What are Littelfuse fuse blocks and holders designed for?

Littelfuse fuse blocks and holders are selected by OEMs and designers for their compact designs, indication features, and DIN-rail mounting flexibility.

What do POWR-BLOKS power distribution blocks provide?

POWR-BLOKS power distribution blocks offer a safe and convenient way to splice cables and manage power distribution requirements within panels and systems.

What is the purpose of Littelfuse feeder protection relays?

Feeder protection relays protect circuits from overcurrent, ground faults, phase loss, overload, and other detrimental conditions.

What is the Industrial Shock-Block® GFCI designed for?

The Industrial Shock-Block® GFCI is designed for people protection in industrial facilities and meets UL Standard 943C Class C and Class D.

How do high-resistance grounding systems benefit industrial applications?

High-resistance grounding limits point-of-fault damage and eliminates arc-flash hazards and transit overvoltages associated with ground faults.

What protection do Littelfuse voltage monitors offer?

Voltage monitors provide protection against both supply line and load side faults when the motor is running.

What functions do Littelfuse timers and flashers control?

Timers and flashers delay starting and stopping loads, and control cycling and sequencing of motors, pumps, compressors, heaters, and lighting.

How do Littelfuse arc-flash protection relays enhance safety?

Arc-flash relays detect a developing arc-flash incident and send a trip signal to interrupt power before significant damage occurs.

What types of motor protection does Littelfuse provide?

Littelfuse offers voltage monitors, current monitors, and Bluetooth enhanced overload relays for low and medium voltage motor protection applications.

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.