Littelfuse 344403A - 344 INDICATING PANEL 344 Bar Knob 16-32V 3AG. Blown-Fuse Indicating Panel Mount Fuseholder for 3AG Fuses (Round Knob).
Littelfuse

344403A

Alternate Item Number: 03440403X

UPC: 079458106992

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Overview

The Littelfuse 344403A Indicating Panel Mount Fuseholder is a critical component for ensuring operational integrity and safety in a wide array of industrial and automotive electrical systems. Engineered by Littelfuse, a globally recognized leader in circuit protection, this fuseholder is specifically designed to accommodate 3AG fuses and features a distinct blown-fuse indication capability. This visual indicator is paramount for rapid diagnostics, allowing technicians to quickly identify a tripped fuse without the need for manual testing, thereby significantly reducing downtime and maintenance costs. The 344403A series fuseholder is built for panel-mount applications, offering a secure and professional installation. Its robust construction ensures durability and reliable performance even in demanding environments where vibration, temperature fluctuations, and electrical stress are common. The integrated round knob provides convenient access for fuse replacement, enhancing user-friendliness during routine maintenance or troubleshooting. Operating within a voltage range of 16-32V, this fuseholder is compatible with a broad spectrum of low-voltage DC applications. Its primary function is to protect sensitive electronic circuits and equipment from damage caused by overcurrents, short circuits, and other electrical anomalies. The blown-fuse indicator is a key feature, typically manifesting as a visual change (e.g., a colored element or flag) when the fuse element has opened, signaling a fault condition. Key features and benefits of the Littelfuse 344403A include: * **Blown-Fuse Indication:** Provides immediate visual confirmation of fuse status, streamlining troubleshooting and minimizing operational interruptions. * **Panel Mount Design:** Ensures secure and professional integration into control panels, power distribution units, and equipment enclosures. * **3AG Fuse Compatibility:** Specifically designed for standard 3AG fuses, offering broad compatibility with existing fuse inventories. * **16-32V Voltage Rating:** Suitable for a wide range of low-voltage DC applications commonly found in industrial machinery, automotive systems, and specialized electronic equipment. * **Durable Construction:** Built with high-quality materials to withstand harsh operating conditions and ensure long-term reliability. * **Round Knob Operation:** Facilitates easy and safe fuse access and replacement. This fuseholder is an indispensable component for applications such as: * Industrial control panels * Power supplies and distribution systems * Automotive electrical systems * Marine electronics * Test and measurement equipment * Specialty vehicle and equipment manufacturing By incorporating the Littelfuse 344403A into your designs, you enhance system safety, improve maintenance efficiency, and ensure the longevity of your valuable electrical equipment. Trust in Littelfuse's expertise in circuit protection to safeguard your operations.
  • Littelfuse 344 Indicating Panel Mount Fuseholder
  • Designed for 3AG Fuses with Round Knob
  • Voltage Rating: 16-32V
  • Features Blown-Fuse Visual Indication
  • Ideal for Panel Mount Applications in Industrial & Automotive Sectors

Specifications

Amperage Rating
15 Amperes
Brand Name
Littelfuse
Mounting Type
Panel Mount
Series
344
Size
3AG
Special Features
Blown fuse indicator
Standard
UL Listed CSA
Sub Brand
344/348 Series
Type
Blown Fuse Indicating / Low Profile Holders for 3AG Fuses
Voltage Rating
16-32V
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PANEL MOUNT ALARM FUSE FUSEHOLDER. Ideal for telecommunications and control panel circuits, the 482 Series fuseholder series is designed for use with Littelfuse 481 Alarm Indicating Fuses. Each holder is designed to accept other manufacturer’s replacement fuses as well. The fuseholder is available in three versions: PCB Mount - 15A: Can be soldered directly to a printed circuit board. Rated up to 15 amperes. Available in single pole or gangable up to 20 poles. Fuseholder is keyed to prevent insertion of 20 ampere fuse. Can be soldered directly to a printed circuit board. Rated up to 15 amperes. Available in single pole or gangable up to 20 poles. Fuseholder is keyed to prevent insertion of 20 ampere fuse. Panel Mount - 20A: Available in a single pole version rated up to 20 amperes. Large leads for wire attachment. Available in a single pole version rated up to 20 amperes. Large leads for wire attachment. Panel Mount - 15A: 15 ampere gangable version of fuseholder is keyed to prevent insertion of 20 ampere fuse. 15 ampere gangable version of fuseholder is keyed to prevent insertion of 20 ampere fuse.

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PANEL MOUNT ALARM FUSE FUSEHOLDER. Ideal for telecommunications and control panel circuits, the 482 Series fuseholder series is designed for use with Littelfuse 481 Alarm Indicating Fuses. Each holder is designed to accept other manufacturer’s replacement fuses as well. The fuseholder is available in three versions: PCB Mount - 15A: Can be soldered directly to a printed circuit board. Rated up to 15 amperes. Available in single pole or gangable up to 20 poles. Fuseholder is keyed to prevent insertion of 20 ampere fuse. Can be soldered directly to a printed circuit board. Rated up to 15 amperes. Available in single pole or gangable up to 20 poles. Fuseholder is keyed to prevent insertion of 20 ampere fuse. Panel Mount - 20A: Available in a single pole version rated up to 20 amperes. Large leads for wire attachment. Available in a single pole version rated up to 20 amperes. Large leads for wire attachment. Panel Mount - 15A: 15 ampere gangable version of fuseholder is keyed to prevent insertion of 20 ampere fuse. 15 ampere gangable version of fuseholder is keyed to prevent insertion of 20 ampere fuse.
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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.