Littelfuse 354903-GY - OMNI-BLOK MTG 3 POLE. A low profile fuse block featuring individual barriers which reinforce the fuse clips while providing greater protection against clip damage and electrical shock. The unique design permits self-alignment of clips to fuse cap. This, plus a one-piece clip/terminal assures low contact resistance. Higher current ratings have been attained using spring brass clips. With the exception of the two-pole unit, multiple pole units may be broken apart to obtain desired number of poles.
Littelfuse

354903-GY

Alternate Item Number: 03540903ZXGY

UPC: 079458780031

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Overview

The Littelfuse OMNI-BLOK MTG 3 Pole Fuse Block, SKU 354903-GY, represents a significant advancement in fuse protection technology for demanding industrial environments. Engineered with a low-profile design, this robust fuse block prioritizes both safety and operational efficiency. Its core innovation lies in the individual barriers integrated around each fuse clip. These barriers serve a dual purpose: they significantly reinforce the fuse clips, preventing damage from vibration or accidental impact, and simultaneously enhance electrical shock protection for personnel working near the equipment. This meticulous design ensures greater reliability and reduces the risk of downtime due to component failure or safety incidents. The OMNI-BLOK's unique construction facilitates a self-aligning mechanism, ensuring that the fuse clips make precise and consistent contact with the fuse cap. This self-alignment, coupled with a robust one-piece clip/terminal design, is critical for achieving and maintaining exceptionally low contact resistance. Low contact resistance is paramount in power distribution systems as it minimizes energy loss as heat, leading to improved system efficiency and preventing premature component degradation. This attention to detail in electrical contact ensures optimal performance and longevity of the protected circuit. Littelfuse has further enhanced the performance capabilities of the OMNI-BLOK series. By utilizing high-quality spring brass clips, this 3-pole unit is capable of handling higher current ratings compared to standard fuse blocks, making it suitable for a wider range of applications where robust current handling is a necessity. The versatility of the OMNI-BLOK extends to its modular design. With the exception of the two-pole unit, multiple pole units can be easily broken apart. This feature allows for custom configurations, enabling engineers and technicians to tailor the fuse block to the exact number of poles required for a specific application, thereby optimizing space and simplifying installation. This adaptability makes it an ideal choice for OEMs and system integrators seeking flexible and reliable power distribution solutions. Applications for the Littelfuse OMNI-BLOK MTG 3 Pole Fuse Block are diverse and span across numerous industrial sectors. It is commonly employed in control panels, motor control centers, power supplies, and various machinery where reliable overcurrent protection is essential. Industries such as manufacturing, automation, renewable energy, and transportation frequently rely on fuse blocks of this caliber to safeguard sensitive electronic components and critical power circuits. The combination of enhanced safety features, superior electrical performance, and flexible configuration options makes the Littelfuse OMNI-BLOK MTG 3 Pole Fuse Block (SKU: 354903-GY) a trusted component for ensuring the integrity and safety of industrial electrical systems. Its durable construction and thoughtful engineering reflect Littelfuse's commitment to providing high-quality, reliable protection solutions for the most demanding applications.
  • Low-profile 3-pole fuse block for efficient space utilization.
  • Individual barriers reinforce fuse clips and enhance electrical shock protection.
  • Unique self-aligning design ensures optimal clip-to-fuse cap contact.
  • One-piece clip/terminal construction guarantees low contact resistance for improved efficiency.
  • Spring brass clips enable higher current ratings for demanding applications.

Specifications

Application
Curcuit Board
Brand Name
Littelfuse
Color
Gray
Material
Brass
Poles
3
Series
OMNI-BLOK MTG
Standard
RoHS
Sub Brand
354 OMNI-BLOK Series
Package Dimensions (L x W x H)
6 IN x 5 IN x 6 IN
Package Dimensions (L x W x H)
15.24 cm x 12.7 cm x 15.24 cm
Package Weight (Imperial)
1.000 L
Package Weight (Metric)
0.454 kg
ACS 3AG OMNI-BLOK SLDR TERM 3 POLE MTG. A low profile fuse block featuring individual barriers which reinforce the fuse clips while providing greater protection against clip damage and electrical shock. The unique design permits self-alignment of clips to fuse cap. This, plus a one-piece clip/terminal assures low contact resistance. Higher current ratings have been attained using spring brass clips. With the exception of the two-pole unit, multiple pole units may be broken apart to obtain desired number of poles.

354003-GY

ACS 3AG OMNI-BLOK SLDR TERM 3 POLE MTG. A low profile fuse block featuring individual barriers which reinforce the fuse clips while providing greater protection against clip damage and electrical shock. The unique design permits self-alignment of clips to fuse cap. This, plus a one-piece clip/terminal assures low contact resistance. Higher current ratings have been attained using spring brass clips. With the exception of the two-pole unit, multiple pole units may be broken apart to obtain desired number of poles.
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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.