Littelfuse FLSR030 - FLSR030 is a Class RK5 fuse with an ampere rating of 30 and cartridge-style construction.
Littelfuse

FLSR030

Alternate Item Number: FLSR030.T

UPC: 079458170733

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Multiplier: 10

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Overview

The **Littelfuse FLSR030 Class RK5 30A cartridge fuse** is a premium industrial-grade overcurrent protection solution engineered for demanding power distribution, motor control, and machinery applications. Designed with Littelfuse’s industry-leading precision and durability, this fuse delivers consistent performance in environments where reliability and safety are critical. Its **Class RK5 rating** ensures compliance with stringent North American electrical standards, making it a trusted choice for professionals who require fast-acting, high-interrupting capacity protection against short circuits and overloads. **Key Features and Benefits:** - **High Interrupting Rating:** The FLSR030 provides superior short-circuit interruption, safeguarding sensitive equipment from catastrophic damage during fault conditions. With a robust design, it handles high fault currents effectively, reducing downtime and maintenance costs in industrial settings. - **Class RK5 Compliance:** Meeting the **RK5 specification**, this fuse offers a balance of fast-acting response and high withstand capability, ideal for protecting transformers, motors, and distribution panels. Its performance aligns with UL 248 and CSA standards, ensuring global compatibility and regulatory adherence. - **Cartridge-Style Construction:** The **30A cartridge design** ensures easy installation and replacement in standard fuse blocks, disconnect switches, and panelboards. Its compact form factor optimizes space utilization while maintaining high thermal and mechanical durability. - **Wide Application Range:** From **power distribution systems** to **motor control circuits**, the FLSR030 excels in environments requiring precise overcurrent protection. Common applications include HVAC systems, industrial machinery, renewable energy installations, and commercial buildings where consistent uptime is essential. - **Littelfuse Reliability:** As a product of **Littelfuse**, a global leader in circuit protection, the FLSR030 benefits from decades of innovation and rigorous testing. Littelfuse’s reputation for quality ensures that this fuse delivers long-term performance, minimizing unplanned outages and enhancing operational safety. **Industry Applications:** The FLSR030 is widely deployed in sectors such as **manufacturing, oil and gas, mining, and utilities**, where electrical systems demand robust protection against transient surges and sustained overloads. Its **30A rating** makes it particularly suitable for protecting branch circuits, branch motor controllers, and feeder lines in both new installations and retrofit projects. Professionals in these industries rely on Littelfuse’s Class RK5 fuses to meet **NFPA 70 (NEC) compliance** while ensuring compatibility with existing infrastructure. **Installation and Maintenance Considerations:** Proper selection and installation of the FLSR030 are critical to maximizing its protective capabilities. Engineers and electricians should verify the **ampere rating, voltage rating, and interrupting capacity** to match the specific circuit requirements. The fuse’s **cartridge design** allows for straightforward replacement in standard fuse holders, but it is essential to ensure compatibility with the panel or disconnect switch. Regular inspections for signs of overheating, corrosion, or physical damage will extend the fuse’s service life and maintain system integrity. **Why Choose Littelfuse?** Littelfuse has been at the forefront of circuit protection technology for over a century, earning a reputation for innovation, reliability, and customer trust. The **FLSR030** exemplifies this legacy, offering a fusion of advanced engineering and real-world performance. Whether deployed in a **high-voltage substation, a factory automation line, or a commercial building**, this fuse provides the peace of mind that comes from using a product backed by a manufacturer committed to safety and excellence. For professionals seeking a **high-quality, code-compliant fuse** that balances cost, performance, and durability, the Littelfuse FLSR030 is an unmatched solution in its class.
  • 30A Class RK5 fuse for industrial overcurrent protection
  • High interrupting rating for superior short-circuit safety
  • Cartridge-style construction for easy installation
  • UL 248 and CSA compliant for global standards
  • Trusted Littelfuse quality for long-term reliability

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)
0.173 L
Package Weight (Metric)
78.400 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 Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
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
9F61 Size B Clips 1.6in

9F61BWW460

9F61 Size B Clips 1.6in
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.