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Littelfuse 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.

Littelfuse MEG450 FUSE - MEGA BOLT-ON BOX 450A. The MEGA® Fuse is designed for high current circuit…

Alternate Item Number: 0MEG450.X

UPC: 079458185553

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Minimum Qty: 10

Multiplier: 10

*Contact for lower quantities*

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

Overview

The Littelfuse MEG450 Bolt-On Fuse delivers high-current circuit protection for demanding applications requiring ultra-high current safeguarding. Rated at 450 Amperes with a 32V AC/DC voltage rating, this MEGA® Series fuse is engineered to handle extreme electrical loads in battery, alternator, and heavy-gauge cable systems. The MEG450 utilizes Littelfuse's patented Diffusion Pill Technology, which precisely controls melting characteristics to manage significant inrush currents while ensuring rapid interruption during fault conditions. This advanced technology prevents nuisance tripping from temporary overcurrents, thanks to its time-delay characteristics, thereby enhancing system uptime and reliability. The bolt-on mounting type ensures a secure and durable connection, critical for high-vibration environments such as heavy-duty vehicles, industrial machinery, and renewable energy systems. The fuse is available in bulk, boxed, or carded packaging (0MEG450.X, 0MEG450.L, 0MEG450.XP) to suit various inventory and application needs. Ideal for OEM vehicle applications, marine systems, and industrial electrical infrastructure, the MEG450 provides dependable short-circuit and overcurrent protection where standard fuses fall short. Manufactured by Littelfuse, a leader in circuit protection, the MEG450 combines innovation with proven performance to meet the rigorous demands of modern electrical designs.
  • 450A current rating for ultra-high current protection
  • 32V AC/DC voltage rating for versatile applications
  • Patented Diffusion Pill Technology for precise melting control
  • Time-delay characteristics to prevent nuisance tripping
  • Bolt-on mounting for secure, durable connections in high-vibration environments

Specifications

Amperage Rating
450 A
Application
Automotive
Brand Name
Littelfuse
Current Rating
450 A
Mounting Type
Bolt-On
Series
MEGA
Special Features
Splashproof
Sub Brand
MEGA Series
Type
Bolt Down Fuse Holder
Voltage Rating
32 V AC/DC
MEGA® SLO-BLO® automotive fuses employ diffusion pill technology to provide time-delay circuit protection. MEGA fuses are ideal for use on batteries, alternators, and heavy gauge wire harnesses that experience large inrushes of current. Use MEGA fuses with ratings of 300 A to 500 A only for short circuit protection.

0298250.TXN

MEGA® SLO-BLO® automotive fuses employ diffusion pill technology to provide time-delay circuit protection. MEGA fuses are ideal for use on batteries, alternators, and heavy gauge wire harnesses that experience large inrushes of current. Use MEGA fuses with ratings of 300 A to 500 A only for short circuit 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.
FUSE AGX 8AG 32V BOX 30A. 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.

AGX30

FUSE AGX 8AG 32V BOX 30A. 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 AGU 5AG 32V BOX 1A. 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.

AGU1

FUSE AGU 5AG 32V BOX 1A. 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 AGU 5AG 32V BOX 4A. 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.

AGU4

FUSE AGU 5AG 32V BOX 4A. 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 is the voltage rating of the MEG450 fuse?

The MEG450 fuse has a voltage rating of 32V AC/DC.

What is the current rating of the MEG450 fuse?

The MEG450 fuse is rated for 450 Amperes.

What technology does the MEG450 fuse use?

The MEG450 fuse utilizes Littelfuse's patented Diffusion Pill Technology for precise melting control.

What are the time-delay characteristics of the MEG450 fuse?

The MEG450 fuse provides time-delay characteristics to prevent nuisance tripping from temporary overcurrents.

What is the mounting type for the MEG450 fuse?

The MEG450 fuse features a bolt-on mounting type for secure connections.

What applications is the MEG450 fuse suitable for?

The MEG450 fuse is ideal for battery and alternator protection, heavy-gauge cables, and high-vibration environments like heavy-duty vehicles and industrial machinery.

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.