Littelfuse LA70QS100-22FI - Littelfuse French Cylindrical style semiconductor fuses are an extension to the LA70QS series. They offer a solid-fill design with high interrupting ratings and an optional striker for visual or remote blown fuse indication. The international 14 x 51mm and 22 x 58mm sizes are accepted worldwide.
Littelfuse

LA70QS100-22FI

Alternate Item Number: LA70QS10022FI

UPC: 079458152999


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Overview

The Littelfuse LA70QS100-22FI represents a significant advancement in semiconductor protection, extending the robust capabilities of the LA70QS series. Engineered for demanding industrial environments, this French cylindrical fuse features a sophisticated solid-fill design, a hallmark of Littelfuse's commitment to reliability and performance. This construction method not only enhances the fuse's durability but also contributes to its superior interrupting ratings, ensuring swift and decisive protection against damaging overcurrents and short circuits. Designed to meet global electrical standards, the 22 x 58mm form factor of the LA70QS100-22FI is widely accepted internationally, facilitating seamless integration into a diverse range of equipment and systems. This international compatibility makes it an ideal choice for manufacturers and integrators operating in global markets, simplifying inventory and design considerations. The fuse's high interrupting capacity is crucial for safeguarding sensitive semiconductor devices, such as power transistors, SCRs, and IGBTs, which are fundamental components in modern power electronics, motor drives, and renewable energy systems. Furthermore, the Littelfuse LA70QS100-22FI offers an optional striker mechanism. This feature provides either visual or remote blown fuse indication, a critical element for operational efficiency and safety. Visual indication allows for immediate on-site identification of a tripped fuse, minimizing downtime. Remote indication, often integrated with control systems, enables proactive monitoring and management of fuse status across larger installations. This dual-option capability enhances system diagnostics and maintenance protocols, ensuring that faults are addressed promptly and effectively. Key features and benefits of the Littelfuse LA70QS100-22FI include: * **Solid-Fill Design:** Provides enhanced durability and superior thermal management, contributing to reliable performance under stress. * **High Interrupting Ratings:** Offers robust protection for sensitive semiconductor components against severe fault conditions. * **International 22 x 58mm Size:** Ensures global compatibility and ease of integration into various equipment designs. * **Optional Striker for Indication:** Facilitates quick visual or remote blown fuse detection, improving diagnostics and safety. * **LA70QS Series Extension:** Leverages the proven reliability and performance of a trusted Littelfuse product line. Applications for this fuse are extensive, spanning industrial power supplies, variable speed drives, DC link protection, and inverters. Its ability to handle high fault currents while protecting delicate semiconductor devices makes it indispensable in sectors like manufacturing automation, renewable energy (solar and wind), electric vehicle charging infrastructure, and telecommunications power systems. Littelfuse, a recognized leader in circuit protection, brings decades of expertise to the design and manufacturing of the LA70QS100-22FI, assuring users of its quality, consistency, and long-term dependability. Selecting the LA70QS100-22FI means investing in a critical component that upholds the integrity and operational continuity of your most vital electrical systems.
  • Littelfuse LA70QS100-22FI French cylindrical semiconductor fuse
  • 22 x 58mm international size for global compatibility
  • Solid-fill design for enhanced durability and reliability
  • High interrupting ratings for superior semiconductor protection
  • Optional striker for visual or remote blown fuse indication

Specifications

Application
Protection of Semiconductors
Brand Name
Littelfuse
Series
LA70QS
Size
22 x 58mm
Special Features
Very-Fast Acting
Standard
UL Recognized
Sub Brand
LA Series
Type
Semiconductor Fuse
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GPM-SRR90

Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount
Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20

C331156

Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20
Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8

1SCM8

Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8
Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.

LCC5

POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.
9F61 Size B Clips 1.6in

9F61BWW460

9F61 Size B Clips 1.6in

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.