Authorized Littelfuse Distributor
Littelfuse FLA004 - FLA fuses are 125 volt, pin-indicating time-delay fuses for protection of control circuit transformers, solenoids, and other circuits with high inrush currents. Metal indicating pin: pops-out; when fuse opens. Pin gives visual indication of open fuse. Use FLA fuses in conjunction with special fuseblocks to operate mechanical signal switches or energize alarm circuits. Fuses rated 12 amperes and above have dual-tube construction.

Littelfuse FLA004 FLA fuses are 125 volt, pin-indicating time-delay fuses for protection of control…

Alternate Item Number: 0FLA004.T

UPC: 079458130539


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Minimum Qty: 10

Multiplier: 10

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Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

The Littelfuse FLA004 is a 125-volt, pin-indicating, time-delay fuse specifically engineered for the protection of control circuit transformers, solenoids, and other circuits characterized by high inrush currents. A key feature of this fuse is its metal indicating pin, which visually pops out when the fuse opens, providing immediate and unambiguous visual indication of an open fuse. This pop-out pin eliminates the need for manual inspection or testing to determine fuse status, thereby significantly reducing troubleshooting time and minimizing operational downtime in critical industrial control systems. The FLA004 is designed for use in conjunction with special Littelfuse fuseblocks, enabling its integration to operate mechanical signal switches or to energize alarm circuits, thereby enhancing system monitoring and response capabilities. Fuses within the FLA series, including the FLA004, that are rated 12 amperes and above are constructed with a dual-tube design. This dual-tube construction is implemented to provide enhanced thermal performance and increased interrupting capacity, particularly in demanding operational environments where robust protection is paramount. The FLA series fuses are therefore suitable for applications requiring reliable protection against both overloads and short circuits in essential control circuits. The Littelfuse FLA004 offers dependable protection with clear visual fault indication for these vital control circuits.
  • 125 volt, pin-indicating, time-delay fuse
  • Protects control circuit transformers, solenoids, and high inrush current circuits
  • Metal indicating pin provides visual indication of open fuse
  • Compatible with Littelfuse special fuseblocks for signal switches or alarm circuits
  • Dual-tube construction for fuses rated 12 amperes and above

Specifications

Amperage Rating
4 Amp
Amperage Rating
4 A
Application
mechanical indication
Brand Name
Littelfuse
Current Rating
4 A
Current Rating
12 A
Interrupt Rating
10 kA
Material
Metal (indicating pin)
Material
Metal
Series
FLA
Special Features
Pin Indicating Fuse
Sub Brand
FLA
Type
Time-Delay
Voltage Rating
125 V
Voltage Rating
125 VAC
Package Weight (Imperial)
0.014 L
Package Weight (Metric)
6.400 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

What is the current rating of the FLA004 fuse?

The FLA004 fuse is rated for 12 amperes.

How does the pin-indicating feature work on the FLA004?

The metal indicating pin pops out when the fuse opens, providing a clear visual indication of an open circuit.

What applications are suitable for the FLA004 fuse?

The FLA004 is designed for protecting control circuit transformers, solenoids, and other circuits with high inrush currents.

Does the FLA004 fuse require special fuseblocks?

Yes, the FLA004 is designed for use with Littelfuse special fuseblocks to operate mechanical signal switches or energize alarm circuits.

What is dual-tube construction in the FLA004 fuse?

Fuses rated 12 amperes and above in the FLA series feature dual-tube construction, which enhances thermal performance and interrupting capacity.

Is the FLA004 fuse suitable for time-delay applications?

Yes, the FLA004 is a time-delay fuse designed to handle high inrush currents while providing protection.

What voltage rating does the FLA004 fuse have?

The FLA004 fuse has a voltage rating of 125 volts.

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.