Littelfuse FLSR100 - FLSR100 is a Class RK5 fuse with an ampere rating of 100 and knife-blade-style construction.
Littelfuse

FLSR100

Alternate Item Number: FLSR100.V

UPC: 079458170825


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Overview

The Littelfuse FLSR100 is a robust and highly reliable Class RK5 fuse, engineered to provide superior overcurrent protection for critical industrial electrical systems. With a substantial 100 Ampere (A) rating and a durable knife-blade-style construction, this fuse is designed to withstand the demanding conditions typically found in industrial environments. Littelfuse, a globally recognized leader in circuit protection, delivers exceptional quality and performance with the FLSR100, ensuring the safety and operational integrity of your valuable equipment. This Class RK5 fuse designation signifies its adherence to specific performance standards, offering a high interrupting rating that is crucial for safely clearing fault currents and preventing extensive damage to electrical infrastructure. The knife-blade design facilitates secure and efficient installation and replacement within compatible fuse holders, a common feature in power distribution panels, motor control centers (MCCs), and various industrial machinery. Its construction prioritizes durability, making it resistant to vibration, shock, and environmental factors that can compromise less robust components. The FLSR100 is an indispensable component for safeguarding sensitive electrical loads against short circuits and overloads. By rapidly interrupting fault conditions, it minimizes downtime, reduces the risk of fire hazards, and extends the lifespan of connected equipment. Professionals in sectors such as manufacturing, utilities, data centers, and heavy industry rely on fuses like the FLSR100 for their consistent performance and adherence to stringent safety regulations. Key features and benefits of the Littelfuse FLSR100 include: * **High Interrupting Rating:** Designed to safely interrupt high fault currents, protecting equipment and personnel. * **Class RK5 Designation:** Meets established industry standards for performance and reliability. * **100A Current Rating:** Suitable for a wide range of industrial applications requiring significant current capacity. * **Knife-Blade Construction:** Ensures secure connection and ease of installation in standard fuse blocks. * **Durable Build:** Engineered for longevity and performance in challenging industrial settings. * **Littelfuse Quality:** Backed by the reputation of a leading manufacturer in circuit protection solutions. When selecting fuses for industrial applications, factors such as voltage rating, interrupting capacity, and physical dimensions are paramount. The FLSR100, with its specific Class RK5 rating and 100A capacity, is a prime choice for applications where dependable protection is non-negotiable. Its application scope extends to protecting transformers, switchgear, and large motor circuits, where the consequences of a fault can be severe. Trust the Littelfuse FLSR100 to provide the essential layer of protection that keeps your industrial operations running smoothly and safely.
  • Littelfuse FLSR100 Class RK5 fuse
  • 100 Ampere (A) current rating
  • Durable knife-blade-style construction
  • Provides reliable overcurrent protection
  • Ideal for industrial power distribution

Specifications

Application
General Purpose
Brand Name
Littelfuse
Connection Type
Knife-blade
Current Rating
100 A
Series
Class RK5
Special Features
Time-Delay
Standard
Standard 248-12 UL Listed/CSA
Sub Brand
POWR-GARD FLSR Series
Type
Class RK5
Package Weight (Imperial)
0.582 L
Package Weight (Metric)
264.400 g
Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount

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

What technical support options are available for Littelfuse products?

Littelfuse offers technical support via phone at +1-800-TEC-FUSE and email at [email protected]. Technical experts can help with product cross-references, engineering drawings, and application assistance.

What types of industrial protection products does Littelfuse offer?

Littelfuse offers a comprehensive range of industrial protection products including fuses, fuse holders, protection relays, timers, voltage monitors, motor protection devices, and ground-fault protection relays.

What types of fuses does Littelfuse manufacture?

Littelfuse manufactures UL Class fuses, high-speed fuses, medium voltage fuses, 10x38mm fuses, solar fuses, and offers fuse blocks and distribution blocks for various industrial applications.

How can distributors access Littelfuse product information and resources?

Distributors can access product information through Littelfuse University, Digital Marketing Assets portal, RepFiles mobile app, Littelfuse Business Center, and technical resources like Techline support.

What is the MROplus™ program for manufacturing facilities?

The MROplus™ program helps manufacturing facilities reduce costs, increase plant safety, decrease downtime, and reduce inventory by optimizing their maintenance and replacement part strategies.

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.