Littelfuse FLSR110 - FLSR110 is a Class RK5 fuse with an ampere rating of 110 and knife-blade-style construction.
Littelfuse

FLSR110

Alternate Item Number: FLSR110.X

UPC: 079458170832

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Overview

The **Littelfuse FLSR110** is a premium **Class RK5 fuse** engineered for robust industrial electrical protection, combining precision engineering with unmatched reliability. Designed with a **110A ampere rating** and **knife-blade-style construction**, this fuse delivers secure, high-performance connections in demanding power distribution systems. Whether protecting motor control circuits, industrial machinery, or critical infrastructure, the FLSR110 ensures consistent overcurrent protection while meeting the most stringent safety standards. **Key Features and Benefits:** - **Class RK5 Compliance:** The FLSR110 adheres to **Class RK5 standards**, offering superior interrupting ratings and time-current characteristics for enhanced safety in high-fault scenarios. This classification ensures compatibility with a wide range of industrial fuse blocks and panels, simplifying system design and maintenance. - **Knife-Blade Construction:** The **knife-blade-style design** provides a secure mechanical and electrical connection, reducing the risk of loose contacts or arcing. This robust construction is ideal for environments with vibration, thermal cycling, or mechanical stress, ensuring long-term reliability. - **110A Ampere Rating:** With a **110-ampere rating**, the FLSR110 is tailored for medium-to-high-current industrial applications, including power distribution panels, motor starters, and branch circuit protection. Its precise ampere rating allows for accurate coordination with downstream protective devices, minimizing nuisance tripping while maximizing system uptime. - **High Interrupting Rating:** Designed to safely interrupt fault currents up to **100,000 amperes** (typical for Class RK5 fuses), the FLSR110 protects against catastrophic failures in industrial settings where fault currents can reach extreme levels. This capability is critical for safeguarding personnel, equipment, and facilities from electrical hazards. - **Durable and Reliable:** Littelfuse’s **industry-leading manufacturing processes** ensure consistent quality and performance. The FLSR110 undergoes rigorous testing to meet **UL, CSA, and IEC standards**, providing peace of mind in mission-critical applications. **Typical Applications:** The **FLSR110** is widely used in **industrial power distribution**, including: - **Motor control centers (MCCs)** and motor starters, where reliable overcurrent protection is essential for preventing damage to motors and associated equipment. - **Power distribution panels** in manufacturing plants, data centers, and commercial buildings, ensuring safe and efficient current flow. - **Industrial machinery and equipment**, such as CNC machines, conveyors, and pumps, where consistent performance under varying load conditions is required. - **Renewable energy systems**, including wind and solar power installations, where protection against overcurrent and short circuits is critical for system integrity. **Why Choose Littelfuse?** Littelfuse is a **global leader in circuit protection**, with over a century of innovation and expertise in fuse technology. The company’s **FLSR110** exemplifies its commitment to quality, safety, and performance, making it a trusted choice for engineers, electricians, and facility managers worldwide. By selecting Littelfuse, professionals gain access to: - **Extensive technical support** and application expertise to optimize fuse selection and system design. - **Global distribution networks** for fast, reliable delivery of critical components. - **Continuous innovation** in fuse technology, ensuring products evolve to meet the demands of modern industrial environments. **Installation and Maintenance Considerations:** Proper installation of the **FLSR110** is straightforward but requires attention to detail. Always ensure the fuse is installed in a **compatible fuse holder** designed for Class RK5 fuses, and verify that the ampere rating matches the system requirements. Regular inspections should include checking for signs of overheating, corrosion, or physical damage. For optimal performance, replace fuses with **identical Littelfuse models** to maintain system coordination and safety compliance. **Industry Trust and Compliance:** The **FLSR110** meets **UL 248-14 (Class RK5)**, **CSA C22.2 No. 248.14**, and **IEC 60269** standards, ensuring it is suitable for use in North American and international markets. Its compliance with these standards simplifies procurement and installation for multinational projects, reducing the need for multiple product variants. For engineers and technicians seeking a **high-performance, reliable fuse** for industrial applications, the **Littelfuse FLSR110** is an unmatched solution. Its combination of **precision engineering, robust construction, and industry-leading safety standards** makes it the ideal choice for protecting critical electrical systems in the most demanding environments.
  • Class RK5 compliance for superior interrupting ratings
  • 110A ampere rating for medium-to-high-current applications
  • Knife-blade construction ensures secure, vibration-resistant connections
  • High interrupting rating up to 100,000 amperes
  • Meets UL 248-14, CSA C22.2 No. 248.14, and IEC 60269 standards

Specifications

Application
General Purpose
Brand Name
Littelfuse
Special Features
Time-Delay
Standard
Standard 248-12 UL Listed/CSA
Sub Brand
POWR-GARD FLSR Series
Type
Class RK5
Package Weight (Imperial)
1.351 L
Package Weight (Metric)
614.000 g
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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.

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.